RHSA-2026:55445 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 10.0 Extended Update Support.

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):

• kernel: iommu: disable SVA when CONFIG_X86 is set (CVE-2025-71089)
• kernel: crypto: seqiv - Do not use req->iv after crypto_aead_encrypt (CVE-2025-71131)
• kernel: scsi: core: Wake up the error handler when final completions race against each other (CVE-2026-23110)
• kernel: mm: thp: deny THP for files on anonymous inodes (CVE-2026-23375)
• kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() (CVE-2026-23455)
• kernel: drm/amd/display: Do not skip unrelated mode changes in DSC validation (CVE-2026-31488)
• kernel: ALSA: usb-audio: Add sanity check for OOB writes at silencing (CVE-2026-43279)
• kernel: rxrpc: Fix potential UAF after skb_unshare() failure (CVE-2026-45998)
• kernel: Arm Processors: Privilege escalation or information disclosure via writes to higher exception level resources (CVE-2025-10263)
• kernel: netfilter: nat: use kfree_rcu to release ops (CVE-2026-53000)
• kernel: dm log: fix out-of-bounds write due to region_count overflow (CVE-2026-53059)
• kernel: net/sched: act_api: use RCU with deferred freeing for action lifecycle (CVE-2026-53264)

Bug Fix(es) and Enhancement(s):

• backport make module and modules-core provides use variant [rhel-10.0.z] (JIRA:RHEL-219433)

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.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture.

Because of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat's CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.

Affected Products

• Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.0 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 10.0 s390x
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.0 ppc64le
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.0 aarch64
• Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 10.0 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 10.0 ppc64le
• Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support 10.0 s390x
• Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 10.0 aarch64
• Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.0 aarch64
• Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 10.0 s390x
• Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.0 ppc64le
• Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.0 x86_64

Fixes

• BZ - 2429104 - CVE-2025-71089 kernel: iommu: disable SVA when CONFIG_X86 is set
• BZ - 2429583 - CVE-2025-71131 kernel: crypto: seqiv - Do not use req->iv after crypto_aead_encrypt
• BZ - 2436755 - CVE-2026-23110 kernel: scsi: core: Wake up the error handler when final completions race against each other
• BZ - 2451199 - CVE-2026-23375 kernel: mm: thp: deny THP for files on anonymous inodes
• BZ - 2454810 - CVE-2026-23455 kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931()
• BZ - 2460619 - CVE-2026-31488 kernel: drm/amd/display: Do not skip unrelated mode changes in DSC validation
• BZ - 2467215 - CVE-2026-43279 kernel: ALSA: usb-audio: Add sanity check for OOB writes at silencing
• BZ - 2482024 - CVE-2026-45998 kernel: rxrpc: Fix potential UAF after skb_unshare() failure
• BZ - 2486958 - CVE-2025-10263 kernel: Arm Processors: Privilege escalation or information disclosure via writes to higher exception level resources
• BZ - 2492273 - CVE-2026-53000 kernel: netfilter: nat: use kfree_rcu to release ops
• BZ - 2492277 - CVE-2026-53059 kernel: dm log: fix out-of-bounds write due to region_count overflow
• BZ - 2492851 - CVE-2026-53264 kernel: net/sched: act_api: use RCU with deferred freeing for action lifecycle

CVEs

• CVE-2025-10263
• CVE-2025-71089
• CVE-2025-71131
• CVE-2026-23110
• CVE-2026-23375
• CVE-2026-23455
• CVE-2026-31488
• CVE-2026-43279
• CVE-2026-45998
• CVE-2026-53000
• CVE-2026-53059
• CVE-2026-53264

References

• https://access.redhat.com/security/updates/classification/#important