RHSA-2026:47040 — Security Advisory
Red Hat Security Advisory: kernel security, bug fix, and enhancement update
Severity
ImportantRed Hat Product Security
Products
Official CSAF product identity
Published · July 28, 2026
Updated · November 4, 2026
Topic
An update for kernel is now available for Red Hat Enterprise Linux 9.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
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kernel: xfrm: Duplicate SPI Handling (CVE-2025-39797)
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kernel: lib/buildid: use __kernel_read() for sleepable context (CVE-2026-23002)
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kernel: futex: Drop CLONE_THREAD requirement for private default hash alloc (CVE-2026-52973)
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kernel: iommu/vt-d: Avoid NULL pointer dereference or refcount corruption (CVE-2026-53281)
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kernel: blk-mq: pop cached request if it is usable (CVE-2026-64017)
Bug Fix(es) and Enhancement(s):
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general protection fault during exportfs / nfsd4_revoke_states [rhel-9.8.z] (JIRA:RHEL-188257)
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Enable Pretimeout Watchdog Panic Functionality on x86 [rhel-9.8.z] (JIRA:RHEL-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.