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Medium ALSA-2026:51035 5 CVEs

Moderate: kernel security, bug fix, and enhancement update

Published Aug 6, 2026 · Updated Oct 29, 2026

Ecosystem: AlmaLinux

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

* kernel: futex: Fix UaF between futex_key_to_node_opt() and vma_replace_policy() (CVE-2026-23415)
* kernel: netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table() (CVE-2026-43450)

Bug Fix(es) and Enhancement(s):

* kernel panics caused by NULL pointer dereferences within octeon_ep_vf [almalinux-9.8.z] (JIRA:AlmaLinux-186331)
* [AlmaLinux 9.4] Kernel memory reclaim bug [almalinux-9.8.z] (JIRA:AlmaLinux-211058)
* Bond network interface is not coming up with MTU 9000 while vPMEM is enabled [almalinux-9.8.z] (JIRA:AlmaLinux-215575)

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.

Fixed packages 74

ReleasePackageFixed in
AlmaLinux · 9 kernel 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-64k 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-64k-core 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-64k-debug 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-64k-debug-core 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-64k-debug-devel 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-64k-debug-devel-matched 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-64k-debug-modules 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-64k-debug-modules-core 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-64k-debug-modules-extra 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-64k-devel 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-64k-devel-matched 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-64k-modules 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-64k-modules-core 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-64k-modules-extra 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-abi-stablelists 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-core 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-cross-headers 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-debug 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-debug-core 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-debug-devel 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-debug-devel-matched 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-debug-modules 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-debug-modules-core 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-debug-modules-extra 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-debug-uki-virt 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-devel 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-devel-matched 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-doc 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-headers 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-modules 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-modules-core 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-modules-extra 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-64k 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-64k-core 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug-core 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug-devel 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug-modules 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug-modules-core 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug-modules-extra 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-64k-devel 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-64k-modules 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-64k-modules-core 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-64k-modules-extra 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-core 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-debug 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-debug-core 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-debug-devel 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-debug-modules 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-debug-modules-core 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-debug-modules-extra 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-devel 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-modules 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-modules-core 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-rt-modules-extra 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-tools 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-tools-libs 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-tools-libs-devel 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-uki-virt 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-uki-virt-addons 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-zfcpdump 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-core 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-devel 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-devel-matched 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-modules 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-modules-core 5.14.0-687.36.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-modules-extra 5.14.0-687.36.1.el9_8
AlmaLinux · 9 libperf 5.14.0-687.36.1.el9_8
AlmaLinux · 9 perf 5.14.0-687.36.1.el9_8
AlmaLinux · 9 python3-perf 5.14.0-687.36.1.el9_8
AlmaLinux · 9 rtla 5.14.0-687.36.1.el9_8
AlmaLinux · 9 rv 5.14.0-687.36.1.el9_8

Vulnerabilities 5

  • High 7.8
    CVE-2026-23415 Public exploit

    futex: Fix UaF between futex_key_to_node_opt() and vma_replace_policy()

    In the Linux kernel, the following vulnerability has been resolved: futex: Fix UaF between futex_key_to_node_opt() and vma_replace_policy() During futex_key_to_node_opt() execution, vma->vm_policy is read under speculative mmap lock and RCU. Concurrently, mbi…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.8
    CVE-2026-31554

    futex: Require sys_futex_requeue() to have identical flags

    In the Linux kernel, the following vulnerability has been resolved: futex: Require sys_futex_requeue() to have identical flags Nicholas reported that his LLM found it was possible to create a UaF when sys_futex_requeue() is used with different flags. The init…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Unscored —
    CVE-2026-31555

    futex: Clear stale exiting pointer in futex_lock_pi() retry path

    In the Linux kernel, the following vulnerability has been resolved: futex: Clear stale exiting pointer in futex_lock_pi() retry path Fuzzying/stressing futexes triggered: WARNING: kernel/futex/core.c:825 at wait_for_owner_exiting+0x7a/0x80, CPU#11: futex_lock…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • Unscored —
    CVE-2026-43450

    netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table()

    In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table() nfnl_cthelper_dump_table() has a 'goto restart' that jumps to a label inside the for loop body. When the "last" helpe…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Unscored —
    CVE-2026-52977

    futex: Prevent lockup in requeue-PI during signal/ timeout wakeup

    In the Linux kernel, the following vulnerability has been resolved: futex: Prevent lockup in requeue-PI during signal/ timeout wakeup During wait-requeue-pi (task A) and requeue-PI (task B) the following race can happen: Task A Task B futex_wait_requeue_pi() …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu

References

  • report
    https://access.redhat.com/security/cve/CVE-2026-23415
  • report
    https://access.redhat.com/security/cve/CVE-2026-43450
  • report
    https://bugzilla.redhat.com/2454320
  • report
    https://bugzilla.redhat.com/2468228
  • advisory
    https://errata.almalinux.org/9/ALSA-2026-51035.html
  • report
    https://www.redhat.com/security/data/cve/CVE-2026-31554.html
  • report
    https://www.redhat.com/security/data/cve/CVE-2026-31555.html
  • report
    https://www.redhat.com/security/data/cve/CVE-2026-52977.html