RHSA-2026:5690 - 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 Moderate. 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: page_pool: Fix use-after-free in page_pool_recycle_in_ring (CVE-2025-38129)
• kernel: Linux kernel: Use-after-free in BPF sockmap can lead to denial of service and privilege escalation (CVE-2025-38154)
• kernel: sctp: avoid NULL dereference when chunk data buffer is missing (CVE-2025-40240)
• kernel: ipv6: BUG() in pskb_expand_head() as part of calipso_skbuff_setattr() (CVE-2025-71085)

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

Fixes

• BZ - 2376034 - CVE-2025-38129 kernel: page_pool: Fix use-after-free in page_pool_recycle_in_ring
• BZ - 2376056 - CVE-2025-38154 kernel: Linux kernel: Use-after-free in BPF sockmap can lead to denial of service and privilege escalation
• BZ - 2418832 - CVE-2025-40240 kernel: sctp: avoid NULL dereference when chunk data buffer is missing
• BZ - 2429026 - CVE-2025-71085 kernel: ipv6: BUG() in pskb_expand_head() as part of calipso_skbuff_setattr()

CVEs

• CVE-2025-38129
• CVE-2025-38154
• CVE-2025-40240
• CVE-2025-71085

References

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