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OpenAdvisories
High ALSA-2026:49212 3 CVEs

Important: kernel security update

Published Jul 31, 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: ipc: limit next_id allocation to the valid ID range (CVE-2026-52923)
* kernel: tipc: fix double-free in tipc_buf_append() (CVE-2026-52993)
* kernel: net: sched: UAF via missing handler for TC_ACT_CONSUMED in tcf_qevent_handle ()
* kernel: net/sched: cls_api: Handle TC_ACT_CONSUMED in tcf_qevent_handle (CVE-2026-64530)

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 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-64k 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-64k-core 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-64k-debug 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-64k-debug-core 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-64k-debug-devel 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-64k-debug-devel-matched 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-64k-debug-modules 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-64k-debug-modules-core 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-64k-debug-modules-extra 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-64k-devel 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-64k-devel-matched 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-64k-modules 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-64k-modules-core 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-64k-modules-extra 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-abi-stablelists 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-core 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-cross-headers 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-debug 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-debug-core 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-debug-devel 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-debug-devel-matched 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-debug-modules 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-debug-modules-core 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-debug-modules-extra 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-debug-uki-virt 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-devel 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-devel-matched 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-doc 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-headers 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-modules 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-modules-core 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-modules-extra 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-64k 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-64k-core 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug-core 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug-devel 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug-modules 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug-modules-core 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug-modules-extra 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-64k-devel 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-64k-modules 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-64k-modules-core 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-64k-modules-extra 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-core 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-debug 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-debug-core 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-debug-devel 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-debug-modules 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-debug-modules-core 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-debug-modules-extra 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-devel 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-modules 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-modules-core 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-rt-modules-extra 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-tools 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-tools-libs 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-tools-libs-devel 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-uki-virt 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-uki-virt-addons 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-zfcpdump 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-core 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-devel 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-devel-matched 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-modules 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-modules-core 5.14.0-687.33.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-modules-extra 5.14.0-687.33.1.el9_8
AlmaLinux · 9 libperf 5.14.0-687.33.1.el9_8
AlmaLinux · 9 perf 5.14.0-687.33.1.el9_8
AlmaLinux · 9 python3-perf 5.14.0-687.33.1.el9_8
AlmaLinux · 9 rtla 5.14.0-687.33.1.el9_8
AlmaLinux · 9 rv 5.14.0-687.33.1.el9_8

Vulnerabilities 3

  • Critical 9.8
    CVE-2026-52993 Public exploit

    tipc: fix double-free in tipc_buf_append()

    In the Linux kernel, the following vulnerability has been resolved: tipc: fix double-free in tipc_buf_append() tipc_msg_validate() can potentially reallocate the skb it is validating, freeing the old one. In tipc_buf_append(), it was being called with a point…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Critical 9.8
    CVE-2026-64530

    net/sched: cls_api: Handle TC_ACT_CONSUMED in tcf_qevent_handle

    In the Linux kernel, the following vulnerability has been resolved: net/sched: cls_api: Handle TC_ACT_CONSUMED in tcf_qevent_handle tcf_classify() can return TC_ACT_CONSUMED while the skb is held by the defragmentation engine (e.g. act_ct on out-of-order frag…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2026-52923 Public exploit

    ipc: limit next_id allocation to the valid ID range

    In the Linux kernel, the following vulnerability has been resolved: ipc: limit next_id allocation to the valid ID range The checkpoint/restore sysctl path can request the next SysV IPC id through ids->next_id. ipc_idr_alloc() currently forwards that request t…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux

References

  • report
    https://access.redhat.com/security/cve/CVE-2026-52923
  • report
    https://access.redhat.com/security/cve/CVE-2026-52993
  • report
    https://access.redhat.com/security/cve/CVE-2026-64530
  • report
    https://bugzilla.redhat.com/2492094
  • report
    https://bugzilla.redhat.com/2492437
  • report
    https://bugzilla.redhat.com/2504052
  • report
    https://bugzilla.redhat.com/2507345
  • advisory
    https://errata.almalinux.org/9/ALSA-2026-49212.html