RHSA-2025:16920 - 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 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: nfsd: don't ignore the return code of svc_proc_register() (CVE-2025-22026)
• kernel: net_sched: hfsc: Fix a UAF vulnerability in class handling (CVE-2025-37797)
• kernel: firmware: arm_scpi: Ensure scpi_info is not assigned if the probe fails (CVE-2022-50087)
• kernel: sctp: linearize cloned gso packets in sctp_rcv (CVE-2025-38718)

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 Real Time 8 x86_64
• Red Hat Enterprise Linux for Real Time for NFV 8 x86_64

Fixes

• BZ - 2360224 - CVE-2025-22026 kernel: nfsd: don't ignore the return code of svc_proc_register()
• BZ - 2363672 - CVE-2025-37797 kernel: net_sched: hfsc: Fix a UAF vulnerability in class handling
• BZ - 2373539 - CVE-2022-50087 kernel: firmware: arm_scpi: Ensure scpi_info is not assigned if the probe fails
• BZ - 2393166 - CVE-2025-38718 kernel: sctp: linearize cloned gso packets in sctp_rcv

CVEs

• CVE-2022-50087
• CVE-2025-22026
• CVE-2025-37797
• CVE-2025-38718

References

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