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High ALSA-2026:47040 5 CVEs

Important: kernel security, bug fix, and enhancement update

Published Jul 28, 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: xfrm: Duplicate SPI Handling (CVE-2025-39797)
* kernel: lib/buildid: use __kernel_read() for sleepable context (CVE-2026-23002)
* kernel: futex: Drop CLONE_THREAD requirement for private default hash alloc (CVE-2026-52973)
* kernel: iommu/vt-d: Avoid NULL pointer dereference or refcount corruption (CVE-2026-53281)
* kernel: blk-mq: pop cached request if it is usable (CVE-2026-64017)

Bug Fix(es) and Enhancement(s):

* general protection fault during exportfs / nfsd4_revoke_states [almalinux-9.8.z] (JIRA:AlmaLinux-188257)
* Enable Pretimeout Watchdog Panic Functionality on x86 [almalinux-9.8.z] (JIRA:AlmaLinux-193729)

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 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-64k 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-64k-core 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-64k-debug 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-64k-debug-core 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-64k-debug-devel 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-64k-debug-devel-matched 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-64k-debug-modules 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-64k-debug-modules-core 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-64k-debug-modules-extra 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-64k-devel 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-64k-devel-matched 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-64k-modules 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-64k-modules-core 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-64k-modules-extra 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-abi-stablelists 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-core 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-cross-headers 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-debug 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-debug-core 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-debug-devel 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-debug-devel-matched 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-debug-modules 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-debug-modules-core 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-debug-modules-extra 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-debug-uki-virt 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-devel 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-devel-matched 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-doc 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-headers 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-modules 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-modules-core 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-modules-extra 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-64k 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-64k-core 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug-core 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug-devel 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug-modules 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug-modules-core 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-64k-debug-modules-extra 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-64k-devel 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-64k-modules 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-64k-modules-core 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-64k-modules-extra 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-core 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-debug 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-debug-core 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-debug-devel 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-debug-modules 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-debug-modules-core 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-debug-modules-extra 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-devel 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-modules 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-modules-core 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-rt-modules-extra 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-tools 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-tools-libs 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-tools-libs-devel 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-uki-virt 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-uki-virt-addons 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-zfcpdump 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-core 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-devel 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-devel-matched 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-modules 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-modules-core 5.14.0-687.31.1.el9_8
AlmaLinux · 9 kernel-zfcpdump-modules-extra 5.14.0-687.31.1.el9_8
AlmaLinux · 9 libperf 5.14.0-687.31.1.el9_8
AlmaLinux · 9 perf 5.14.0-687.31.1.el9_8
AlmaLinux · 9 python3-perf 5.14.0-687.31.1.el9_8
AlmaLinux · 9 rtla 5.14.0-687.31.1.el9_8
AlmaLinux · 9 rv 5.14.0-687.31.1.el9_8

Vulnerabilities 5

  • High 8.8
    CVE-2026-53281

    iommu/vt-d: Avoid NULL pointer dereference or refcount corruption

    In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Avoid NULL pointer dereference or refcount corruption Commit 60f030f7418d ("iommu/vt-d: Avoid use of NULL after WARN_ON_ONCE") fixed a NULL pointer dereference in an unlikely situ…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.8
    CVE-2026-52973

    futex: Drop CLONE_THREAD requirement for private default hash alloc

    In the Linux kernel, the following vulnerability has been resolved: futex: Drop CLONE_THREAD requirement for private default hash alloc Currently need_futex_hash_allocate_default() depends on strict pthread semantics, abusing CLONE_THREAD. This breaks the non…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.8
    CVE-2026-64017

    blk-mq: pop cached request if it is usable

    In the Linux kernel, the following vulnerability has been resolved: blk-mq: pop cached request if it is usable When submitting a bio to blk-mq, if the task should sleep after peeking a cached request, but before it pops it, the plug flushes and calls blk_mq_f…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • Unscored —
    CVE-2025-39797

    xfrm: Duplicate SPI Handling

    In the Linux kernel, the following vulnerability has been resolved: xfrm: Duplicate SPI Handling The issue originates when Strongswan initiates an XFRM_MSG_ALLOCSPI Netlink message, which triggers the kernel function xfrm_alloc_spi(). This function is expecte…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • Unscored —
    CVE-2026-23002 Public exploit

    lib/buildid: use __kernel_read() for sleepable context

    In the Linux kernel, the following vulnerability has been resolved: lib/buildid: use __kernel_read() for sleepable context Prevent a "BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio". For the sleepable context, convert freader to u…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu

References

  • report
    https://access.redhat.com/security/cve/CVE-2025-39797
  • report
    https://access.redhat.com/security/cve/CVE-2026-23002
  • report
    https://access.redhat.com/security/cve/CVE-2026-52973
  • report
    https://access.redhat.com/security/cve/CVE-2026-53281
  • report
    https://access.redhat.com/security/cve/CVE-2026-64017
  • report
    https://bugzilla.redhat.com/2400057
  • report
    https://bugzilla.redhat.com/2432666
  • report
    https://bugzilla.redhat.com/2492413
  • report
    https://bugzilla.redhat.com/2493728
  • report
    https://bugzilla.redhat.com/2502449
  • advisory
    https://errata.almalinux.org/9/ALSA-2026-47040.html