RHSA-2025:14691 - 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: bpf, test_run: Fix use-after-free issue in eth_skb_pkt_type() (CVE-2025-21867)
• kernel: crypto: algif_hash - fix double free in hash_accept (CVE-2025-38079)
• kernel: ftrace: Fix NULL pointer dereference in is_ftrace_trampoline when ftrace is dead (CVE-2022-49977)
• kernel: sch_hfsc: make hfsc_qlen_notify() idempotent (CVE-2025-38177)
• kernel: net/sched: Always pass notifications when child class becomes empty (CVE-2025-38350)

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 - 2355334 - CVE-2025-21867 kernel: bpf, test_run: Fix use-after-free issue in eth_skb_pkt_type()
• BZ - 2373383 - CVE-2025-38079 kernel: crypto: algif_hash - fix double free in hash_accept
• BZ - 2373574 - CVE-2022-49977 kernel: ftrace: Fix NULL pointer dereference in is_ftrace_trampoline when ftrace is dead
• BZ - 2376354 - CVE-2025-38177 kernel: sch_hfsc: make hfsc_qlen_notify() idempotent
• BZ - 2382054 - CVE-2025-38350 kernel: net/sched: Always pass notifications when child class becomes empty

CVEs

• CVE-2022-49977
• CVE-2025-21867
• CVE-2025-38079
• CVE-2025-38177
• CVE-2025-38350

References

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