RHSA-2026:47632 - Security Advisory

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.

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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

• kernel: drm/amd/display: Do not skip unrelated mode changes in DSC validation (CVE-2026-31488)
• kernel: net: sched: act_csum: validate nested VLAN headers (CVE-2026-31684)
• kernel: xfrm: defensively unhash xfrm_state lists in __xfrm_state_delete (CVE-2026-46116)
• kernel: drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs() (CVE-2026-46209)

Bug Fix(es) and Enhancement(s):

• [RHEL-9] Performance impact of CVE-2025-38085 (JIRA:RHEL-161143)
• NVMe-FC: Panic during NVMe Controller Reset tests (JIRA:RHEL-178451)

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.

Affected Products

• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.2 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.2 x86_64

Fixes

• BZ - 2460619 - CVE-2026-31488 kernel: drm/amd/display: Do not skip unrelated mode changes in DSC validation
• BZ - 2461757 - CVE-2026-31684 kernel: net: sched: act_csum: validate nested VLAN headers
• BZ - 2482523 - CVE-2026-46116 kernel: xfrm: defensively unhash xfrm_state lists in __xfrm_state_delete
• BZ - 2482636 - CVE-2026-46209 kernel: drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs()

CVEs

• CVE-2026-31488
• CVE-2026-31684
• CVE-2026-46116
• CVE-2026-46209

References

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