RHSA-2025:22087 - Security Advisory

Topic

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.

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: 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.

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 9.0 x86_64

Fixes

• BZ - 2393164 - CVE-2025-38729 kernel: ALSA: usb-audio: Validate UAC3 power domain descriptors, too
• BZ - 2394615 - CVE-2025-39757 kernel: ALSA: usb-audio: Validate UAC3 cluster segment descriptors
• BZ - 2394627 - CVE-2025-40300 kernel: x86/vmscape: Add conditional IBPB mitigation
• BZ - 2395681 - CVE-2023-53297 kernel: Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp
• BZ - 2395805 - CVE-2025-39817 kernel: efivarfs: Fix slab-out-of-bounds in efivarfs_d_compare
• BZ - 2395879 - CVE-2022-50341 kernel: cifs: fix oops during encryption
• BZ - 2396130 - CVE-2023-53365 kernel: ip6mr: Fix skb_under_panic in ip6mr_cache_report()
• BZ - 2396376 - CVE-2023-53393 kernel: RDMA/mlx5: Fix mlx5_ib_get_hw_stats when used for device
• BZ - 2396494 - CVE-2022-50403 kernel: ext4: fix undefined behavior in bit shift for ext4_check_flag_values

CVEs

• CVE-2022-50341
• CVE-2022-50403
• CVE-2023-53297
• CVE-2023-53365
• CVE-2023-53393
• CVE-2025-38729
• CVE-2025-39757
• CVE-2025-39817
• CVE-2025-40300

References

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