RHSA-2026:95556
Vulnerability from csaf_redhat - Published: 2026-11-05 14:17 - Updated: 2026-11-09 09:54Summary
Red Hat Security Advisory: kernel security update
Severity
Important
Notes
Topic: An update for kernel is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table() (CVE-2026-43450)
* kernel: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers (CVE-2026-46056)
* kernel: procfs: fix missing RCU protection when reading real_parent in do_task_stat() (CVE-2026-46259)
* kernel: dm cache policy smq: fix missing locks in invalidating cache blocks (CVE-2026-53062)
* kernel: ipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo() (CVE-2026-63924)
* kernel: ipv6: exthdrs: refresh nh after handling HAO option (CVE-2026-63922)
* kernel: ipv6: validate extension header length before copying to cmsg (CVE-2026-63920)
* kernel: selinux: check connect-related permissions on TCP Fast Open (CVE-2026-72243)
* kernel: ipv4: validate checksum_start before completing checksum (CVE-2026-99999)
* kernel: ZDI-CAN-33367: Linux Kernel skbuff skb_zerocopy Improper Ownership Management Local Privilege Escalation Vulnerability ()
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in the Linux kernel's `nfnetlink_cthelper` component. This vulnerability, an out-of-bounds read, occurs in the `nfnl_cthelper_dump_table()` function when a network connection tracking helper is removed during a dump operation, leading to a bypassed bounds check. A local attacker could exploit this to cause a system crash (denial of service) or potentially access sensitive information from kernel memory.
7.1 (High)
Affected products
Fixed
93 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-ELS:bpftool-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
|
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| Unresolved product id: 7Server-ELS:bpftool-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
|
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| Unresolved product id: 7Server-ELS:bpftool-0:3.10.0-1160.169.1.el7.s390x | — |
Vendor Fix
fix
|
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| Unresolved product id: 7Server-ELS:bpftool-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
|
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| Unresolved product id: 7Server-ELS:bpftool-debuginfo-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
|
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| Unresolved product id: 7Server-ELS:bpftool-debuginfo-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:bpftool-debuginfo-0:3.10.0-1160.169.1.el7.s390x | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:bpftool-debuginfo-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
|
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| Unresolved product id: 7Server-ELS:kernel-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-0:3.10.0-1160.169.1.el7.s390x | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-0:3.10.0-1160.169.1.el7.src | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-abi-whitelists-0:3.10.0-1160.169.1.el7.noarch | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-bootwrapper-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-bootwrapper-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-debug-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-debug-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-debug-0:3.10.0-1160.169.1.el7.s390x | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-debug-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-debug-debuginfo-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-debug-debuginfo-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-debug-debuginfo-0:3.10.0-1160.169.1.el7.s390x | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-debug-debuginfo-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-debug-devel-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-debug-devel-0:3.10.0-1160.169.1.el7.s390x | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-debug-devel-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-debuginfo-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-debuginfo-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-debuginfo-0:3.10.0-1160.169.1.el7.s390x | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-debuginfo-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-debuginfo-common-ppc64-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-debuginfo-common-ppc64le-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-debuginfo-common-s390x-0:3.10.0-1160.169.1.el7.s390x | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-debuginfo-common-x86_64-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-devel-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-devel-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-devel-0:3.10.0-1160.169.1.el7.s390x | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-devel-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-doc-0:3.10.0-1160.169.1.el7.noarch | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-kdump-0:3.10.0-1160.169.1.el7.s390x | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-kdump-debuginfo-0:3.10.0-1160.169.1.el7.s390x | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-kdump-devel-0:3.10.0-1160.169.1.el7.s390x | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-tools-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-tools-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-tools-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-tools-debuginfo-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-tools-debuginfo-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-tools-debuginfo-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-tools-libs-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-tools-libs-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:kernel-tools-libs-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:perf-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:perf-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
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| Unresolved product id: 7Server-ELS:perf-0:3.10.0-1160.169.1.el7.s390x | — |
Vendor Fix
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| Unresolved product id: 7Server-ELS:perf-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:perf-debuginfo-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:perf-debuginfo-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:perf-debuginfo-0:3.10.0-1160.169.1.el7.s390x | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:perf-debuginfo-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:python-perf-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:python-perf-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:python-perf-0:3.10.0-1160.169.1.el7.s390x | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:python-perf-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:python-perf-debuginfo-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:python-perf-debuginfo-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:python-perf-debuginfo-0:3.10.0-1160.169.1.el7.s390x | — |
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fix
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| Unresolved product id: 7Server-ELS:python-perf-debuginfo-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:bpftool-debuginfo-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:bpftool-debuginfo-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:bpftool-debuginfo-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:kernel-debug-debuginfo-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:kernel-debug-debuginfo-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:kernel-debug-debuginfo-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:kernel-debug-devel-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:kernel-debuginfo-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:kernel-debuginfo-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:kernel-debuginfo-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:kernel-debuginfo-common-ppc64-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:kernel-debuginfo-common-ppc64le-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:kernel-debuginfo-common-x86_64-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:kernel-tools-debuginfo-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:kernel-tools-debuginfo-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:kernel-tools-debuginfo-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
|
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| Unresolved product id: 7Server-optional-ELS:kernel-tools-libs-devel-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:kernel-tools-libs-devel-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:kernel-tools-libs-devel-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:perf-debuginfo-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
|
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| Unresolved product id: 7Server-optional-ELS:perf-debuginfo-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
|
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| Unresolved product id: 7Server-optional-ELS:perf-debuginfo-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:python-perf-debuginfo-0:3.10.0-1160.169.1.el7.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:python-perf-debuginfo-0:3.10.0-1160.169.1.el7.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:python-perf-debuginfo-0:3.10.0-1160.169.1.el7.x86_64 | — |
Vendor Fix
fix
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Threats
Impact
Moderate
A flaw was found in the Linux kernel's Bluetooth subsystem. This vulnerability, a Use-After-Free (UAF), exists within the Secure Simple Pairing (SSP) passkey handlers. It occurs when `hci_conn` lookup and field access are performed without proper locking, allowing a connection to be freed concurrently. This could potentially enable a local attacker to cause a denial of service or execute arbitrary code.
7.1 (High)
Affected products
Fixed
93 products, the same list as for
CVE-2026-43450
Threats
Impact
Moderate
A flaw was found in the Linux kernel's procfs component. When reading /proc/[pid]/stat, the do_task_stat() function accesses task->real_parent without proper Read-Copy-Update (RCU) protection. This missing protection creates a race condition, which can lead to a Use-After-Free (UAF) vulnerability. A local attacker could potentially exploit this to cause a system crash or achieve other unspecified impacts.
7.1 (High)
Affected products
Fixed
93 products, the same list as for
CVE-2026-43450
Threats
Impact
Moderate
A flaw was found in the Linux kernel's device-mapper (dm) cache policy, specifically within the smq module. In passthrough mode, the invalidate_mapping operation lacks proper locking, allowing for concurrent access. This can lead to data races, resulting in data corruption or use-after-free issues, which may cause system instability or a denial of service.
7.0 (High)
Affected products
Fixed
93 products, the same list as for
CVE-2026-43450
Threats
Impact
Moderate
A flaw was found in the Linux kernel's IPv6 networking stack. An unprivileged local user could exploit a vulnerability in how IPv6 extension header lengths are handled. By manipulating these headers using nftables, an attacker can trigger an out-of-bounds read, leading to information disclosure from kernel memory.
7.0 (High)
Affected products
Fixed
93 products, the same list as for
CVE-2026-43450
Threats
Impact
Moderate
A flaw was found in the Linux kernel's IPv6 extension header processing. When processing the Home Address Option (HAO), the cached network header pointer may become invalid if the packet's memory is reallocated. This can lead to incorrect parsing of subsequent IPv6 Type-Length-Value (TLV) options, potentially causing unexpected network behavior or a denial of service.
7.5 (High)
Affected products
Fixed
93 products, the same list as for
CVE-2026-43450
Threats
Impact
Important
A flaw was found in the Linux kernel's handling of IPv6 extended headers. Specifically, the `ipv6_hop_jumbo()` function, which processes jumbo payloads, can modify internal packet buffer (skb) pointers. However, the network header (nh) pointer is not recomputed after these modifications. This oversight could lead to incorrect data processing, potentially causing system instability or a denial of service (DoS) due to malformed packets.
7.5 (High)
Affected products
Fixed
93 products, the same list as for
CVE-2026-43450
Threats
Impact
Important
A flaw was found in the Linux kernel's Security-Enhanced Linux (SELinux) module. When using TCP Fast Open, SELinux failed to properly check connect-related permissions. This oversight could allow a local attacker to bypass SELinux network access controls, potentially enabling unauthorized network connections that should have been restricted by security policies.
7.3 (High)
Affected products
Fixed
93 products, the same list as for
CVE-2026-43450
Threats
Impact
Important
A flaw was found in the Linux kernel. A local unprivileged user could exploit this flaw to achieve privilege escalation by modifying read-only files cached in memory. The issue occurs because the networking subsystem fails to preserve shared memory indicators when transferring network data buffers. Consequently, subsequent operations such as Encapsulating Security Payload (ESP) decryption modify shared memory pages directly in place rather than creating a safe copy.
7.8 (High)
Affected products
Fixed
93 products, the same list as for
CVE-2026-43450
Threats
Impact
Important
A flaw was found in the Linux kernel. A local attacker or untrusted guest virtual machine can exploit this vulnerability by transmitting network packets containing malformed checksum metadata into the IPv4 networking subsystem. This failure to validate checksum metadata can corrupt memory during packet handling, potentially leading to arbitrary code execution on the host, a system crash resulting in Denial of Service (DoS), or information disclosure of sensitive memory.
8.8 (High)
Affected products
Fixed
93 products, the same list as for
CVE-2026-43450
Threats
Impact
Important
References
66 references
{
"document": {
"aggregate_severity": {
"namespace": "https://access.redhat.com/security/updates/classification/",
"text": "Important"
},
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "en",
"notes": [
{
"category": "summary",
"text": "An update for kernel is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
"title": "Topic"
},
{
"category": "general",
"text": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table() (CVE-2026-43450)\n\n* kernel: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers (CVE-2026-46056)\n\n* kernel: procfs: fix missing RCU protection when reading real_parent in do_task_stat() (CVE-2026-46259)\n\n* kernel: dm cache policy smq: fix missing locks in invalidating cache blocks (CVE-2026-53062)\n\n* kernel: ipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo() (CVE-2026-63924)\n\n* kernel: ipv6: exthdrs: refresh nh after handling HAO option (CVE-2026-63922)\n\n* kernel: ipv6: validate extension header length before copying to cmsg (CVE-2026-63920)\n\n* kernel: selinux: check connect-related permissions on TCP Fast Open (CVE-2026-72243)\n\n* kernel: ipv4: validate checksum_start before completing checksum (CVE-2026-99999)\n\n* kernel: ZDI-CAN-33367: Linux Kernel skbuff skb_zerocopy Improper Ownership Management Local Privilege Escalation Vulnerability ()\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
"title": "Details"
},
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"name": "Out-of-bounds Read"
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"discovery_date": "2026-05-08T00:00:00+00:00",
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"text": "2468228"
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"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s `nfnetlink_cthelper` component. This vulnerability, an out-of-bounds read, occurs in the `nfnl_cthelper_dump_table()` function when a network connection tracking helper is removed during a dump operation, leading to a bypassed bounds check. A local attacker could exploit this to cause a system crash (denial of service) or potentially access sensitive information from kernel memory.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table()",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Red Hat has evaluated this vulnerability as Moderate because exploitation requires local system access to query netfilter connection-tracking tables, restricting the threat scope to local denial of service or unintended kernel memory disclosure. In default Red Hat Enterprise Linux environments, user-space connection-tracking helper infrastructure is not actively utilized, significantly reducing common exposure. Triggering the boundary flaw requires racing table dump requests against helper removals through local netlink sockets.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-43450"
},
{
"category": "external",
"summary": "RHBZ#2468228",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468228"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-43450",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-43450"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-43450",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43450"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026050857-CVE-2026-43450-8919@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026050857-CVE-2026-43450-8919@gregkh/T"
}
],
"release_date": "2026-05-08T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-11-05T14:17:35+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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"url": "https://access.redhat.com/errata/RHSA-2026:95556"
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],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table()"
},
{
"cve": "CVE-2026-46056",
"cwe": {
"id": "CWE-413",
"name": "Improper Resource Locking"
},
"discovery_date": "2026-05-27T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2482181"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s Bluetooth subsystem. This vulnerability, a Use-After-Free (UAF), exists within the Secure Simple Pairing (SSP) passkey handlers. It occurs when `hci_conn` lookup and field access are performed without proper locking, allowing a connection to be freed concurrently. This could potentially enable a local attacker to cause a denial of service or execute arbitrary code.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This vulnerability is rated as Moderate because exploitation requires adjacent proximity or local interaction to initiate a Bluetooth Secure Simple Pairing transaction, and standard Red Hat Enterprise Linux server deployments do not enable or attach Bluetooth hardware by default. On hosts equipped with an active Bluetooth interface, concurrent connection release during passkey processing can trigger memory corruption, potentially leading to a kernel crash or privilege escalation. Systems operating without Bluetooth adapters or with the subsystem disabled are not exposed to this issue.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-46056"
},
{
"category": "external",
"summary": "RHBZ#2482181",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482181"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-46056",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-46056"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-46056",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46056"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026052754-CVE-2026-46056-0ff1@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026052754-CVE-2026-46056-0ff1@gregkh/T"
}
],
"release_date": "2026-05-27T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-11-05T14:17:35+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Moderate"
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],
"title": "kernel: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers"
},
{
"cve": "CVE-2026-46259",
"cwe": {
"id": "CWE-820",
"name": "Missing Synchronization"
},
"discovery_date": "2026-06-03T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2484477"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s procfs component. When reading /proc/[pid]/stat, the do_task_stat() function accesses task-\u003ereal_parent without proper Read-Copy-Update (RCU) protection. This missing protection creates a race condition, which can lead to a Use-After-Free (UAF) vulnerability. A local attacker could potentially exploit this to cause a system crash or achieve other unspecified impacts.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: procfs: fix missing RCU protection when reading real_parent in do_task_stat()",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-46259"
},
{
"category": "external",
"summary": "RHBZ#2484477",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2484477"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-46259",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-46259"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-46259",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46259"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026060336-CVE-2026-46259-6c94@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026060336-CVE-2026-46259-6c94@gregkh/T"
}
],
"release_date": "2026-06-03T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-11-05T14:17:35+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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"url": "https://access.redhat.com/errata/RHSA-2026:95556"
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: procfs: fix missing RCU protection when reading real_parent in do_task_stat()"
},
{
"cve": "CVE-2026-53062",
"cwe": {
"id": "CWE-414",
"name": "Missing Lock Check"
},
"discovery_date": "2026-06-24T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2492278"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s device-mapper (dm) cache policy, specifically within the smq module. In passthrough mode, the invalidate_mapping operation lacks proper locking, allowing for concurrent access. This can lead to data races, resulting in data corruption or use-after-free issues, which may cause system instability or a denial of service.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: dm cache policy smq: fix missing locks in invalidating cache blocks",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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{
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"url": "https://access.redhat.com/security/cve/CVE-2026-53062"
},
{
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{
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"summary": "https://www.cve.org/CVERecord?id=CVE-2026-53062",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-53062"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-53062",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53062"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026062402-CVE-2026-53062-a727@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026062402-CVE-2026-53062-a727@gregkh/T"
}
],
"release_date": "2026-06-24T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-11-05T14:17:35+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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{
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"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
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{
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"details": "Moderate"
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"title": "kernel: dm cache policy smq: fix missing locks in invalidating cache blocks"
},
{
"cve": "CVE-2026-63920",
"cwe": {
"id": "CWE-125",
"name": "Out-of-bounds Read"
},
"discovery_date": "2026-07-19T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2502330"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s IPv6 networking stack. An unprivileged local user could exploit a vulnerability in how IPv6 extension header lengths are handled. By manipulating these headers using nftables, an attacker can trigger an out-of-bounds read, leading to information disclosure from kernel memory.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: ipv6: validate extension header length before copying to cmsg",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This vulnerability is rated as Moderate severity for Red Hat Enterprise Linux because exploitation is restricted to local attackers who must construct packet-filtering rules, constraining the impact primarily to kernel memory disclosure or system crash rather than remote compromise. Although unprivileged user namespaces allow local accounts to configure nftables rules within isolated network namespaces, the flaw cannot be triggered directly by untrusted incoming traffic across external network boundaries. Consequently, typical production environments face confined risk limited to local information leakage.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-63920"
},
{
"category": "external",
"summary": "RHBZ#2502330",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502330"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-63920",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-63920"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63920",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63920"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026071948-CVE-2026-63920-54a7@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026071948-CVE-2026-63920-54a7@gregkh/T"
}
],
"release_date": "2026-07-19T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-11-05T14:17:35+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"category": "impact",
"details": "Moderate"
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],
"title": "kernel: ipv6: validate extension header length before copying to cmsg"
},
{
"cve": "CVE-2026-63922",
"cwe": {
"id": "CWE-825",
"name": "Expired Pointer Dereference"
},
"discovery_date": "2026-07-19T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2502327"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s IPv6 extension header processing. When processing the Home Address Option (HAO), the cached network header pointer may become invalid if the packet\u0027s memory is reallocated. This can lead to incorrect parsing of subsequent IPv6 Type-Length-Value (TLV) options, potentially causing unexpected network behavior or a denial of service.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: ipv6: exthdrs: refresh nh after handling HAO option",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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{
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"url": "https://access.redhat.com/security/cve/CVE-2026-63922"
},
{
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{
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"url": "https://www.cve.org/CVERecord?id=CVE-2026-63922"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63922",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63922"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026071948-CVE-2026-63922-5716@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026071948-CVE-2026-63922-5716@gregkh/T"
}
],
"release_date": "2026-07-19T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-11-05T14:17:35+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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"url": "https://access.redhat.com/errata/RHSA-2026:95556"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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{
"category": "impact",
"details": "Important"
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],
"title": "kernel: ipv6: exthdrs: refresh nh after handling HAO option"
},
{
"cve": "CVE-2026-63924",
"cwe": {
"id": "CWE-825",
"name": "Expired Pointer Dereference"
},
"discovery_date": "2026-07-19T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2502326"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s handling of IPv6 extended headers. Specifically, the `ipv6_hop_jumbo()` function, which processes jumbo payloads, can modify internal packet buffer (skb) pointers. However, the network header (nh) pointer is not recomputed after these modifications. This oversight could lead to incorrect data processing, potentially causing system instability or a denial of service (DoS) due to malformed packets.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: ipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo()",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
{
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{
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"url": "https://www.cve.org/CVERecord?id=CVE-2026-63924"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63924",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63924"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026071948-CVE-2026-63924-ec60@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026071948-CVE-2026-63924-ec60@gregkh/T"
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"release_date": "2026-07-19T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-11-05T14:17:35+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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"url": "https://access.redhat.com/errata/RHSA-2026:95556"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
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{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"details": "Important"
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],
"title": "kernel: ipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo()"
},
{
"cve": "CVE-2026-72243",
"cwe": {
"id": "CWE-551",
"name": "Incorrect Behavior Order: Authorization Before Parsing and Canonicalization"
},
"discovery_date": "2026-08-15T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2516684"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s Security-Enhanced Linux (SELinux) module. When using TCP Fast Open, SELinux failed to properly check connect-related permissions. This oversight could allow a local attacker to bypass SELinux network access controls, potentially enabling unauthorized network connections that should have been restricted by security policies.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: selinux: check connect-related permissions on TCP Fast Open",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This vulnerability is rated as an Important severity flaw because it allows an unprivileged local user or confined domain to subvert mandatory access controls and initiate restricted outbound network communications. On Red Hat Enterprise Linux systems running SELinux in enforcing mode, the lack of socket connection authorization checks during TCP Fast Open operations undermines isolation boundaries intended to confine unprivileged processes. While exploitation necessitates local code execution on the host, the ability to defeat security policy enforcement without elevated privileges warrants the Important classification.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
{
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{
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},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-72243",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72243"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026081551-CVE-2026-72243-04e7@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026081551-CVE-2026-72243-04e7@gregkh/T"
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"release_date": "2026-08-15T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-11-05T14:17:35+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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"url": "https://access.redhat.com/errata/RHSA-2026:95556"
},
{
"category": "workaround",
"details": "To mitigate this issue, TCP Fast Open (TFO) can be disabled if not required by applications. Disabling TFO prevents the vulnerable code path from being exercised, thereby eliminating the SELinux permission bypass.\n\nTo disable TCP Fast Open:\n1. Check the current setting:\n `sysctl net.ipv4.tcp_fastopen`\n2. To disable it temporarily:\n `sudo sysctl -w net.ipv4.tcp_fastopen=0`\n3. To make the change persistent across reboots, add or modify the following line in `/etc/sysctl.conf`:\n `net.ipv4.tcp_fastopen = 0`\n4. Apply the persistent changes:\n `sudo sysctl -p`\n\nDisabling TCP Fast Open may impact the performance of applications that utilize this feature for faster connection establishment.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "LOW",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L",
"version": "3.1"
},
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{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: selinux: check connect-related permissions on TCP Fast Open"
},
{
"cve": "CVE-2026-99284",
"cwe": {
"id": "CWE-281",
"name": "Improper Preservation of Permissions"
},
"discovery_date": "2026-11-07T20:50:50.996937+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2568683"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel. A local unprivileged user could exploit this flaw to achieve privilege escalation by modifying read-only files cached in memory. The issue occurs because the networking subsystem fails to preserve shared memory indicators when transferring network data buffers. Consequently, subsequent operations such as Encapsulating Security Payload (ESP) decryption modify shared memory pages directly in place rather than creating a safe copy.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: kernel: privilege escalation via missing shared fragment flag in skb_zerocopy",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This vulnerability is classified as having an Important severity because it enables an authenticated local attacker to bypass system file protections and achieve root-level privilege escalation. In standard deployments, the Linux kernel networking subsystem mishandles shared buffer state during packet zero-copy procedures, which allows subsequent cryptographic operations to overwrite memory-cached pages belonging to write-protected system files. While exploiting the condition depends on interactions with packet processing pathways such as netfilter queueing or Open vSwitch, the resulting ability to alter sensitive files presents a severe threat to host integrity.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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{
"category": "vendor_fix",
"date": "2026-11-05T14:17:35+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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"url": "https://access.redhat.com/errata/RHSA-2026:95556"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
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{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: kernel: privilege escalation via missing shared fragment flag in skb_zerocopy"
},
{
"cve": "CVE-2026-99999",
"cwe": {
"id": "CWE-787",
"name": "Out-of-bounds Write"
},
"discovery_date": "2026-10-15T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2553429"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel. A local attacker or untrusted guest virtual machine can exploit this vulnerability by transmitting network packets containing malformed checksum metadata into the IPv4 networking subsystem. This failure to validate checksum metadata can corrupt memory during packet handling, potentially leading to arbitrary code execution on the host, a system crash resulting in Denial of Service (DoS), or information disclosure of sensitive memory.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: ipv4: validate checksum_start before completing checksum",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This IMPORTANT-severity flaw affects the Linux kernel as shipped in Red Hat products, including the kernel and kernel-rt packages in Red Hat Enterprise Linux and the kernels shipped in Red Hat In-Vehicle OS. The IPv4 networking subsystem does not validate packet checksum metadata before completing a checksum: when a packet with a malformed checksum_start value enters the IPv4 stack, skb_checksum_help() can write out of bounds and corrupt the network header and other kernel memory (CWE-787). A local attacker or an untrusted guest virtual machine able to transmit such packets into an affected host could exploit this to crash the system (denial of service), disclose sensitive kernel memory, or potentially execute arbitrary code on the host. Red Hat tracks this flaw as a KEV active-exploit case. All currently tracked Red Hat product streams are marked affected, and fixes are being pursued by the responsible Red Hat product teams under delegated resolution. Red Hat\u0027s severity differs from the upstream assessment: Red Hat assigns a CVSS 3.1 score of 8.8 (IMPORTANT, AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H), while the CVE.org record assigns 9.3 (CRITICAL, AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H); the two assessments differ on the privileges-required metric.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"url": "https://access.redhat.com/security/cve/CVE-2026-99999"
},
{
"category": "external",
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{
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"url": "https://www.cve.org/CVERecord?id=CVE-2026-99999"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-99999",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-99999"
},
{
"category": "external",
"summary": "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-99999.mbox",
"url": "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-99999.mbox"
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"release_date": "2026-10-15T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-11-05T14:17:35+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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"restart_required": {
"category": "machine"
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"url": "https://access.redhat.com/errata/RHSA-2026:95556"
},
{
"category": "workaround",
"details": "Check the virtio-net device name with monitor command \"info network\":\n~~~\n(qemu) info network\nnet0: index=0,type=nic,model=virtio-net-pci,macaddr=52:54:00:12:34:57\n \\ vhost0: index=0,type=tap,ifname=tap-vm0,script=no,downscript=no\n~~~\n\nRemove the device and re-add it with csum=off:\n~~~\n(qemu) device_del net0\n(qemu) device_add virtio-net-pci,netdev=vhost0,id=net0,mac=52:54:00:12:34:57,csum=off\n~~~",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
},
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"7Server-optional-ELS:perf-debuginfo-0:3.10.0-1160.169.1.el7.x86_64",
"7Server-optional-ELS:python-perf-debuginfo-0:3.10.0-1160.169.1.el7.ppc64",
"7Server-optional-ELS:python-perf-debuginfo-0:3.10.0-1160.169.1.el7.ppc64le",
"7Server-optional-ELS:python-perf-debuginfo-0:3.10.0-1160.169.1.el7.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: ipv4: validate checksum_start before completing checksum"
}
]
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.