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OpenAdvisories
High ALSA-2026:24381 3 CVEs

Important: kernel security update

Published Jun 8, 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: smb: client: fix OOB reads parsing symlink error response (CVE-2026-31613)
* kernel: Buffer overflow in drivers/xen/sys-hypervisor.c (CVE-2026-31786)
* kernel: Linux kernel: smb: client: reject userspace cifs.spnego descriptions (CVE-2026-46243)

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 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-64k 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-64k-core 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-64k-debug 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-64k-debug-core 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-64k-debug-devel 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-64k-debug-devel-matched 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-64k-debug-modules 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-64k-debug-modules-core 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-64k-debug-modules-extra 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-64k-devel 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-64k-devel-matched 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-64k-modules 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-64k-modules-core 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-64k-modules-extra 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-abi-stablelists 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-core 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-cross-headers 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-debug 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-debug-core 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-debug-devel 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-debug-devel-matched 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-debug-modules 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-debug-modules-core 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-debug-modules-extra 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-debug-uki-virt 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-devel 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-devel-matched 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-doc 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-headers 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-modules 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-modules-core 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-modules-extra 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-64k 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-64k-core 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug-core 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug-devel 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug-modules 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug-modules-core 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug-modules-extra 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-64k-devel 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-64k-modules 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-64k-modules-core 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-64k-modules-extra 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-core 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-debug 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-debug-core 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-debug-devel 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-debug-modules 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-debug-modules-core 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-debug-modules-extra 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-devel 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-modules 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-modules-core 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-rt-modules-extra 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-tools 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-tools-libs 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-tools-libs-devel 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-uki-virt 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-uki-virt-addons 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-zfcpdump 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-core 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-devel 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-devel-matched 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-modules 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-modules-core 5.14.0-687.13.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-modules-extra 5.14.0-687.13.1.el9_8
AlmaLinux · 9 libperf 5.14.0-687.13.1.el9_8
AlmaLinux · 9 perf 5.14.0-687.13.1.el9_8
AlmaLinux · 9 python3-perf 5.14.0-687.13.1.el9_8
AlmaLinux · 9 rtla 5.14.0-687.13.1.el9_8
AlmaLinux · 9 rv 5.14.0-687.13.1.el9_8

Vulnerabilities 3

  • High 8.1
    CVE-2026-31613

    smb: client: fix OOB reads parsing symlink error response

    In the Linux kernel, the following vulnerability has been resolved: smb: client: fix OOB reads parsing symlink error response When a CREATE returns STATUS_STOPPED_ON_SYMLINK, smb2_check_message() returns success without any length validation, leaving the syml…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2026-31786

    Buffer overflow in drivers/xen/sys-hypervisor.c

    In the Linux kernel, the following vulnerability has been resolved: Buffer overflow in drivers/xen/sys-hypervisor.c The build id returned by HYPERVISOR_xen_version(XENVER_build_id) is neither NUL terminated nor a string. The first causes a buffer overflow as …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.1
    CVE-2026-46243 Public exploit

    smb: client: reject userspace cifs.spnego descriptions

    In the Linux kernel, the following vulnerability has been resolved: smb: client: reject userspace cifs.spnego descriptions cifs.spnego key descriptions contain authority-bearing fields such as pid, uid, creduid, and upcall_target that cifs.upcall treats as ke…

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

References

  • report
    https://access.redhat.com/security/cve/CVE-2026-31613
  • report
    https://access.redhat.com/security/cve/CVE-2026-31786
  • report
    https://access.redhat.com/security/cve/CVE-2026-46243
  • report
    https://bugzilla.redhat.com/2461480
  • report
    https://bugzilla.redhat.com/2464096
  • report
    https://bugzilla.redhat.com/2481486
  • advisory
    https://errata.almalinux.org/9/ALSA-2026-24381.html