RHSA-2026:84793
Vulnerability from csaf_redhat - Published: 2026-10-19 10:55 - Updated: 2026-10-19 17:13Summary
Red Hat Security Advisory: kernel security update
Severity
Important
Notes
Topic: An update for kernel is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service.
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: scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show() (CVE-2026-46149)
* kernel: dm cache policy smq: fix missing locks in invalidating cache blocks (CVE-2026-53062)
* kernel: blk-cgroup: fix UAF in __blkcg_rstat_flush() (CVE-2026-63802)
* 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)
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
72 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:bpftool-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:bpftool-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:bpftool-debuginfo-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:bpftool-debuginfo-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-0:4.18.0-477.175.1.el8_8.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-abi-stablelists-0:4.18.0-477.175.1.el8_8.noarch | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-core-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-core-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-core-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-core-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-debuginfo-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-debuginfo-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-devel-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-devel-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-modules-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-modules-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-modules-extra-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-modules-extra-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debuginfo-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debuginfo-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debuginfo-common-ppc64le-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debuginfo-common-x86_64-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-devel-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-devel-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-doc-0:4.18.0-477.175.1.el8_8.noarch | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-modules-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-modules-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
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|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-modules-extra-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
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|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-modules-extra-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-debuginfo-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-debuginfo-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-libs-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-libs-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:perf-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:perf-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:perf-debuginfo-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:perf-debuginfo-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:python3-perf-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:python3-perf-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:python3-perf-debuginfo-0:4.18.0-477.175.1.el8_8.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:python3-perf-debuginfo-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:bpftool-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
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|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:bpftool-debuginfo-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-0:4.18.0-477.175.1.el8_8.src | — |
Vendor Fix
fix
|
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-abi-stablelists-0:4.18.0-477.175.1.el8_8.noarch | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-core-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-core-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-debuginfo-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-devel-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-modules-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-modules-extra-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debuginfo-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debuginfo-common-x86_64-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-devel-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-doc-0:4.18.0-477.175.1.el8_8.noarch | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-modules-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-modules-extra-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-tools-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-tools-debuginfo-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-tools-libs-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:perf-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:perf-debuginfo-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:python3-perf-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:python3-perf-debuginfo-0:4.18.0-477.175.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
Threats
Impact
Moderate
A flaw was found in the Linux kernel's SCSI target subsystem. This vulnerability, a buffer overflow, occurs in the `tg_pt_gp_members_show()` function when processing long iSCSI IQN names. An attacker could potentially exploit this by providing a specially crafted input, leading to the disclosure of sensitive information from the kernel stack or a denial of service (DoS) if `CONFIG_FORTIFY_SOURCE` is enabled.
7.0 (High)
Affected products
Fixed
72 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
72 products, the same list as for
CVE-2026-43450
Threats
Impact
Moderate
A flaw was found in the Linux kernel's block input/output control group (blk-cgroup) component. This vulnerability, a Use-After-Free (UAF), occurs when multiple block control groups are released at the same time. A race condition allows one group to remove another's entries while it is still in use, leading to premature memory deallocation. This can result in system instability or a denial of service.
7.0 (High)
Affected products
Fixed
72 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
72 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.
7.0 (High)
Affected products
Fixed
72 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.
7.0 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2026-43450
Threats
Impact
Important
References
45 references
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"cve": "CVE-2026-43450",
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"name": "Out-of-bounds Read"
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"discovery_date": "2026-05-08T00:00:00+00:00",
"ids": [
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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": "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": "2026-10-19T10:55:05+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"
},
"url": "https://access.redhat.com/errata/RHSA-2026:84793"
}
],
"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-2026-46149",
"cwe": {
"id": "CWE-120",
"name": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)"
},
"discovery_date": "2026-05-28T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2482566"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s SCSI target subsystem. This vulnerability, a buffer overflow, occurs in the `tg_pt_gp_members_show()` function when processing long iSCSI IQN names. An attacker could potentially exploit this by providing a specially crafted input, leading to the disclosure of sensitive information from the kernel stack or a denial of service (DoS) if `CONFIG_FORTIFY_SOURCE` is enabled.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show()",
"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-2026-46149"
},
{
"category": "external",
"summary": "RHBZ#2482566",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482566"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-46149",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-46149"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-46149",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46149"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026052822-CVE-2026-46149-ad2e@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026052822-CVE-2026-46149-ad2e@gregkh/T"
}
],
"release_date": "2026-05-28T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-19T10:55:05+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"
},
"url": "https://access.redhat.com/errata/RHSA-2026:84793"
}
],
"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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}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show()"
},
{
"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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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-53062"
},
{
"category": "external",
"summary": "RHBZ#2492278",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492278"
},
{
"category": "external",
"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": "2026-10-19T10:55:05+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": {
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},
"url": "https://access.redhat.com/errata/RHSA-2026:84793"
}
],
"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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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: dm cache policy smq: fix missing locks in invalidating cache blocks"
},
{
"cve": "CVE-2026-63802",
"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": "2502251"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s block input/output control group (blk-cgroup) component. This vulnerability, a Use-After-Free (UAF), occurs when multiple block control groups are released at the same time. A race condition allows one group to remove another\u0027s entries while it is still in use, leading to premature memory deallocation. This can result in system instability or a denial of service.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: blk-cgroup: fix UAF in __blkcg_rstat_flush()",
"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-2026-63802"
},
{
"category": "external",
"summary": "RHBZ#2502251",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502251"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-63802",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-63802"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63802",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63802"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026071901-CVE-2026-63802-1c53@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026071901-CVE-2026-63802-1c53@gregkh/T"
}
],
"release_date": "2026-07-19T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-19T10:55:05+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-2026:84793"
}
],
"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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],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: blk-cgroup: fix UAF in __blkcg_rstat_flush()"
},
{
"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": "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-2026-63920"
},
{
"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": "2026-10-19T10:55:05+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": {
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},
"url": "https://access.redhat.com/errata/RHSA-2026:84793"
}
],
"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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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"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"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-63922"
},
{
"category": "external",
"summary": "RHBZ#2502327",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502327"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-63922",
"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": "2026-10-19T10:55:05+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-2026:84793"
},
{
"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": "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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],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"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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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-63924"
},
{
"category": "external",
"summary": "RHBZ#2502326",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502326"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-63924",
"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"
}
],
"release_date": "2026-07-19T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-19T10:55:05+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-2026:84793"
},
{
"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": "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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}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: ipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo()"
}
]
}
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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.
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- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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- 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
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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.