AlmaLinux released errata ALSA-2026:47040 for version 9 to patch five kernel vulnerabilities affecting network security, memory management, and storage subsystems. The update resolves specific issues tied to CVE-2025-39797 through CVE-2026-64017 while fixing a general protection fault that triggered during NFS state revocation operations. Deployment also enables Pretimeout Watchdog Panic functionality for x86 processors, which streamlines crash reporting and system recovery procedures.

ALSA-2026:47040: kernel security, bug fix, and enhancement update (Important)

ALSA-2026:47040: kernel security, bug fix, and enhancement update (Important)

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AlmaLinux: 9
Type: Security
Severity: Important
Release date: 2026-08-01

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.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/9/ALSA-2026-47040.html

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Kind regards,
AlmaLinux Team