RHSA-2025:22087 — Security Advisory

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.0 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.

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: ALSA: usb-audio: Validate UAC3 power domain descriptors, too (CVE-2025-38729)

• kernel: ALSA: usb-audio: Validate UAC3 cluster segment descriptors (CVE-2025-39757)

• kernel: x86/vmscape: Add conditional IBPB mitigation (CVE-2025-40300)

• kernel: Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp (CVE-2023-53297)

• kernel: efivarfs: Fix slab-out-of-bounds in efivarfs_d_compare (CVE-2025-39817)

• kernel: cifs: fix oops during encryption (CVE-2022-50341)

• kernel: ip6mr: Fix skb_under_panic in ip6mr_cache_report() (CVE-2023-53365)

• kernel: RDMA/mlx5: Fix mlx5_ib_get_hw_stats when used for device (CVE-2023-53393)

• kernel: ext4: fix undefined behavior in bit shift for ext4_check_flag_values (CVE-2022-50403)

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.