RHSA-2026:71016 - Security Advisory

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.

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/amdgpu: Fix use-after-free race in VM acquire (CVE-2026-43370)
• kernel: mac802154: llsec: add skb_cow_data() before in-place crypto (CVE-2026-63831)
• kernel: sctp: don't free the ASCONF's own transport in DEL-IP processing (CVE-2026-64564)
• kernel: ASoC: SOF: ipc3-control: Validate size in snd_sof_update_control (CVE-2026-72261)
• kernel: xfrm: ah6: validate routing header segments_left (CVE-2026-80844)
• kernel: net: tun: bound receive headroom (CVE-2026-81000)
• kernel: scsi: qla2xxx: Bound rsp_info_len to avoid OOB sense-data read (CVE-2026-89846)

Bug Fix(es) and Enhancement(s):

• sctp: prevent peer transport count overflow [rhel-8.10.z] (JIRA:RHEL-216297)

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 Real Time 8 x86_64
• Red Hat Enterprise Linux for Real Time for NFV 8 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 8.10 x86_64

Fixes

• BZ - 2468244 - CVE-2026-43370 kernel: drm/amdgpu: Fix use-after-free race in VM acquire
• BZ - 2502243 - CVE-2026-63831 kernel: mac802154: llsec: add skb_cow_data() before in-place crypto
• BZ - 2510890 - CVE-2026-64564 kernel: sctp: don't free the ASCONF's own transport in DEL-IP processing
• BZ - 2516527 - CVE-2026-72261 kernel: ASoC: SOF: ipc3-control: Validate size in snd_sof_update_control
• BZ - 2528676 - CVE-2026-80844 kernel: xfrm: ah6: validate routing header segments_left
• BZ - 2532176 - CVE-2026-81000 kernel: net: tun: bound receive headroom
• BZ - 2535391 - CVE-2026-89846 kernel: scsi: qla2xxx: Bound rsp_info_len to avoid OOB sense-data read

CVEs

• CVE-2026-43370
• CVE-2026-63831
• CVE-2026-64564
• CVE-2026-72261
• CVE-2026-80844
• CVE-2026-81000
• CVE-2026-89846

References

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