RHSA-2026:94596

Vulnerability from csaf_redhat - Published: 2026-11-03 15:43 - Updated: 2026-11-09 09:49
Summary
Red Hat Security Advisory: kernel security update
Severity
Important
Notes
Topic: An update for kernel is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On. 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: HID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq (CVE-2026-43051) * kernel: ipvs: reload ip header after head reallocation (CVE-2026-68476) * kernel: ipvs: clear IPv4 options after rebasing tunnel ICMP errors (CVE-2026-74669) * kernel: ALSA: usx2y: bound the hwdep mmap fault offset (CVE-2026-74641) * kernel: Linux kernel IPVS: Denial of Service due to stale memory references (CVE-2026-80714) * 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.
CVE-2026-43051

A flaw was found in the Linux kernel's Wacom Human Interface Device (HID) driver. This vulnerability allows a remote attacker to trigger an out-of-bounds read by sending a specially crafted, short Bluetooth HID report. This can lead to the disclosure of sensitive information from the system's memory.

7.1 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
CWE-125 - Out-of-bounds Read
Affected products
Product Identifier Version Remediation
Unresolved product id: BaseOS-8.4.0.Z.AUS:bpftool-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:bpftool-debuginfo-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-0:4.18.0-305.217.1.el8_4.src —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-abi-stablelists-0:4.18.0-305.217.1.el8_4.noarch —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-core-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debug-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debug-core-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debug-debuginfo-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debug-devel-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debug-modules-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debug-modules-extra-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debuginfo-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debuginfo-common-x86_64-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-devel-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-doc-0:4.18.0-305.217.1.el8_4.noarch —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-modules-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-modules-extra-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-tools-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-tools-debuginfo-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-tools-libs-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:perf-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:perf-debuginfo-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:python3-perf-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.AUS:python3-perf-debuginfo-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:bpftool-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:bpftool-debuginfo-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-0:4.18.0-305.217.1.el8_4.src —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-abi-stablelists-0:4.18.0-305.217.1.el8_4.noarch —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-core-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-debug-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-debug-core-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-debug-debuginfo-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-debug-devel-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-debug-modules-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-debug-modules-extra-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-debuginfo-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-debuginfo-common-x86_64-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-devel-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-doc-0:4.18.0-305.217.1.el8_4.noarch —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-modules-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-modules-extra-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-tools-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-tools-debuginfo-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-tools-libs-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:perf-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:perf-debuginfo-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:python3-perf-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:python3-perf-debuginfo-0:4.18.0-305.217.1.el8_4.x86_64 —
Vendor Fix fix
Threats
Impact Moderate
CVE-2026-68476

A flaw was found in the Linux kernel's IP Virtual Server (IPVS) module. When processing network packets, a buffer reallocation can leave an IP header pointer referencing freed memory. An attacker could exploit this use-after-free condition to cause a Denial of Service (DoS) by crashing the system or potentially corrupt system memory.

7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-825 - Expired Pointer Dereference
Affected products
Fixed 50 products, the same list as for CVE-2026-43051
Threats
Impact Important
CVE-2026-74641

A flaw was found in the Advanced Linux Sound Architecture (ALSA) usx2y driver in the Linux kernel. A local attacker, by opening the hwdep node of an attached US-X2Y device, could exploit an unbounded memory mapping (mmap) fault offset. This allows read-write access to arbitrary kernel memory, potentially leading to a denial of service (kernel crash) or privilege escalation.

7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-787 - Out-of-bounds Write
Affected products
Fixed 50 products, the same list as for CVE-2026-43051
Threats
Impact Moderate
CVE-2026-74669

A flaw was found in the Linux kernel's IP Virtual Server (IPVS) component. When processing Internet Control Message Protocol (ICMP) errors for tunneled packets, the system can incorrectly use a stale IPv4 option offset. A remote attacker could exploit this by sending a specially crafted ICMP packet, leading to a stack out-of-bounds write. This vulnerability could result in a denial of service or potentially arbitrary code execution.

8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-787 - Out-of-bounds Write
Affected products
Fixed 50 products, the same list as for CVE-2026-43051
Threats
Impact Important
CVE-2026-80714

A flaw was found in the Linux kernel's IP Virtual Server (IPVS) component. When a synced connection is established, it can incorrectly inherit a "one-packet" flag from its destination. This misconfiguration causes the connection's expiry process to mishandle its cleanup, leaving behind stale memory references. This issue could potentially be exploited by an attacker to cause a denial of service (DoS) or lead to system instability.

7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-825 - Expired Pointer Dereference
Affected products
Fixed 50 products, the same list as for CVE-2026-43051
Threats
Impact Important
CVE-2026-99284

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)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-281 - Improper Preservation of Permissions
Affected products
Fixed 50 products, the same list as for CVE-2026-43051
Threats
Impact Important
References
URL Category
https://access.redhat.com/errata/RHSA-2026:94596 self
https://access.redhat.com/security/updates/classi… external
https://bugzilla.redhat.com/show_bug.cgi?id=2464462 external
https://bugzilla.redhat.com/show_bug.cgi?id=2516251 external
https://bugzilla.redhat.com/show_bug.cgi?id=2521375 external
https://bugzilla.redhat.com/show_bug.cgi?id=2521436 external
https://bugzilla.redhat.com/show_bug.cgi?id=2525436 external
https://bugzilla.redhat.com/show_bug.cgi?id=2559835 external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2026-43051 self
https://bugzilla.redhat.com/show_bug.cgi?id=2464462 external
https://www.cve.org/CVERecord?id=CVE-2026-43051 external
https://nvd.nist.gov/vuln/detail/CVE-2026-43051 external
https://lore.kernel.org/linux-cve-announce/202605… external
https://access.redhat.com/security/cve/CVE-2026-68476 self
https://bugzilla.redhat.com/show_bug.cgi?id=2516251 external
https://www.cve.org/CVERecord?id=CVE-2026-68476 external
https://nvd.nist.gov/vuln/detail/CVE-2026-68476 external
https://lore.kernel.org/linux-cve-announce/202608… external
https://access.redhat.com/security/cve/CVE-2026-74641 self
https://bugzilla.redhat.com/show_bug.cgi?id=2521436 external
https://www.cve.org/CVERecord?id=CVE-2026-74641 external
https://nvd.nist.gov/vuln/detail/CVE-2026-74641 external
https://lore.kernel.org/linux-cve-announce/202608… external
https://access.redhat.com/security/cve/CVE-2026-74669 self
https://bugzilla.redhat.com/show_bug.cgi?id=2521375 external
https://www.cve.org/CVERecord?id=CVE-2026-74669 external
https://nvd.nist.gov/vuln/detail/CVE-2026-74669 external
https://lore.kernel.org/linux-cve-announce/202608… external
https://access.redhat.com/security/cve/CVE-2026-80714 self
https://bugzilla.redhat.com/show_bug.cgi?id=2525436 external
https://www.cve.org/CVERecord?id=CVE-2026-80714 external
https://nvd.nist.gov/vuln/detail/CVE-2026-80714 external
https://lore.kernel.org/linux-cve-announce/202608… external
https://access.redhat.com/security/cve/CVE-2026-99284 self
https://bugzilla.redhat.com/show_bug.cgi?id=2568683 external
https://www.cve.org/CVERecord?id=CVE-2026-99284 external
https://nvd.nist.gov/vuln/detail/CVE-2026-99284 external
https://git.kernel.org/stable/c/1a9c180cd8435917b… external
https://git.kernel.org/stable/c/1c623e3cbf43f12dd… external
https://git.kernel.org/stable/c/79dc34beb1fdb3da7… external
https://git.kernel.org/stable/c/d7d6ff98d5d1b400f… external
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      "cve": "CVE-2026-43051",
      "cwe": {
        "id": "CWE-125",
        "name": "Out-of-bounds Read"
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      "discovery_date": "2026-05-01T00:00:00+00:00",
      "ids": [
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          "text": "2464462"
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          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s Wacom Human Interface Device (HID) driver. This vulnerability allows a remote attacker to trigger an out-of-bounds read by sending a specially crafted, short Bluetooth HID report. This can lead to the disclosure of sensitive information from the system\u0027s memory.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: HID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "A Bluetooth HID report parsing bug in the Wacom driver can cause an out of bounds read in wacom_intuos_bt_irq. Report 0x03 needs at least 22 bytes and report 0x04 needs 32 bytes because it falls through into the 0x03 handling path, but the old code processed shorter reports without validating these lengths. A malicious or compromised Bluetooth HID device can send a crafted short report and make the kernel read past the received report buffer while updating Wacom input or battery state. For the CVSS the PR:N is used in the paranoid score because the attacker only needs Bluetooth device control and does not need a local account on the victim. The issue is adjacent network reachable over Bluetooth rather than Internet reachable.",
          "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-2026-43051"
        },
        {
          "category": "external",
          "summary": "RHBZ#2464462",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464462"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-43051",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-43051"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-43051",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43051"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026050107-CVE-2026-43051-0d15@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026050107-CVE-2026-43051-0d15@gregkh/T"
        }
      ],
      "release_date": "2026-05-01T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-11-03T15:43:54+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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            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
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    {
      "cve": "CVE-2026-68476",
      "cwe": {
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2516251"
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        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s IP Virtual Server (IPVS) module. When processing network packets, a buffer reallocation can leave an IP header pointer referencing freed memory. An attacker could exploit this use-after-free condition to cause a Denial of Service (DoS) by crashing the system or potentially corrupt system memory.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: ipvs: reload ip header after head reallocation",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat has rated this vulnerability as Important rather than Moderate because improper memory handling during packet processing can lead to kernel memory corruption or an abrupt system crash. The issue specifically affects environments running IP Virtual Server (IPVS) functionality, which is not enabled or loaded by default across standard installations. Consequently, exposure is limited to hosts actively configured for IPVS packet forwarding or load-balancing clusters.",
          "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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      "title": "kernel: ipvs: reload ip header after head reallocation"
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    {
      "cve": "CVE-2026-74641",
      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
      },
      "discovery_date": "2026-08-22T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2521436"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Advanced Linux Sound Architecture (ALSA) usx2y driver in the Linux kernel. A local attacker, by opening the hwdep node of an attached US-X2Y device, could exploit an unbounded memory mapping (mmap) fault offset. This allows read-write access to arbitrary kernel memory, potentially leading to a denial of service (kernel crash) or privilege escalation.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: ALSA: usx2y: bound the hwdep mmap fault offset",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "ALSA usx2y hwdep mmap fault handling can use an attacker controlled page offset without a bounds check and convert an address outside the shared buffer into a mapped struct page. A local process that can open the hwdep node for an attached US-X2Y device can choose the mmap offset and may obtain read-write access to kernel memory outside the intended object. The buf is not triggerable if no hardware that is being used by snd-usb-usx2y driver (that is Kernel module).",
          "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": "external",
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          "url": "https://lore.kernel.org/linux-cve-announce/2026082223-CVE-2026-74641-92d7@gregkh/T"
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      "title": "kernel: ALSA: usx2y: bound the hwdep mmap fault offset"
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    {
      "cve": "CVE-2026-74669",
      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
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      "discovery_date": "2026-08-22T00:00:00+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2521375"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s IP Virtual Server (IPVS) component. When processing Internet Control Message Protocol (ICMP) errors for tunneled packets, the system can incorrectly use a stale IPv4 option offset. A remote attacker could exploit this by sending a specially crafted ICMP packet, leading to a stack out-of-bounds write. This vulnerability could result in a denial of service or potentially arbitrary code execution.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: ipvs: clear IPv4 options after rebasing tunnel ICMP errors",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability is rated with an Important severity because a remote attacker can cause kernel stack memory corruption by sending malicious network packets, which can lead to a denial of service or potential code execution. In standard Red Hat Enterprise Linux installations, the IP Virtual Server (IPVS) kernel module is not loaded by default, limiting risk to systems configured as load balancers. Exploitation requires the host to actively handle encapsulated network flows and process ICMP error messages for tunneled sessions.",
          "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": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-74669"
        },
        {
          "category": "external",
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          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2521375"
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          "url": "https://www.cve.org/CVERecord?id=CVE-2026-74669"
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74669"
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          "summary": "https://lore.kernel.org/linux-cve-announce/2026082229-CVE-2026-74669-f574@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026082229-CVE-2026-74669-f574@gregkh/T"
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          "category": "vendor_fix",
          "date": "2026-11-03T15:43:54+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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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/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: ipvs: clear IPv4 options after rebasing tunnel ICMP errors"
    },
    {
      "cve": "CVE-2026-80714",
      "cwe": {
        "id": "CWE-825",
        "name": "Expired Pointer Dereference"
      },
      "discovery_date": "2026-08-28T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2525436"
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      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s IP Virtual Server (IPVS) component. When a synced connection is established, it can incorrectly inherit a \"one-packet\" flag from its destination. This misconfiguration causes the connection\u0027s expiry process to mishandle its cleanup, leaving behind stale memory references. This issue could potentially be exploited by an attacker to cause a denial of service (DoS) or lead to system instability.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: ipvs: do not propagate one-packet flag to synced conns",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability is rated as Important because an authenticated local user could exploit improper connection cleanup in the kernel to trigger memory corruption, potentially leading to a denial of service or local privilege escalation. On default Red Hat Enterprise Linux deployments, IP Virtual Server synchronization is not enabled unless the system is specifically configured as a load-balancing node or cluster proxy. Hosts that do not load the IPVS subsystem or participate in connection state replication are not exposed to this flaw during standard operations.",
          "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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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-80714"
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          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-80714",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-80714"
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          "category": "external",
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          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026082809-CVE-2026-80714-799a@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026082809-CVE-2026-80714-799a@gregkh/T"
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          "date": "2026-11-03T15:43:54+00:00",
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      "cve": "CVE-2026-99284",
      "cwe": {
        "id": "CWE-281",
        "name": "Improper Preservation of Permissions"
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      "discovery_date": "2026-11-07T20:50:50.996937+00:00",
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          "text": "2568683"
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        {
          "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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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-99284"
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          "category": "external",
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          "category": "vendor_fix",
          "date": "2026-11-03T15:43:54+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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            "attackVector": "LOCAL",
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            "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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      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "kernel: kernel: privilege escalation via missing shared fragment flag in skb_zerocopy"
    }
  ]
}



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