RHSA-2025:14094 - 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: padata: fix UAF in padata_reorder (CVE-2025-21727)
• kernel: x86/microcode/AMD: Fix out-of-bounds on systems with CPU-less NUMA nodes (CVE-2025-21991)
• kernel: memstick: rtsx_usb_ms: Fix slab-use-after-free in rtsx_usb_ms_drv_remove (CVE-2025-22020)
• kernel: net_sched: hfsc: Fix a UAF vulnerability in class handling (CVE-2025-37797)
• kernel: selinux: Add boundary check in put_entry() (CVE-2022-50200)
• kernel: ext4: avoid resizing to a partial cluster size (CVE-2022-50020)
• kernel: drivers:md:fix a potential use-after-free bug (CVE-2022-50022)
• kernel: net: ch9200: fix uninitialised access during mii_nway_restart (CVE-2025-38086)

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 - 2348516 - CVE-2025-21727 kernel: padata: fix UAF in padata_reorder
• BZ - 2356917 - CVE-2025-21991 kernel: x86/microcode/AMD: Fix out-of-bounds on systems with CPU-less NUMA nodes
• BZ - 2360099 - CVE-2025-22020 kernel: memstick: rtsx_usb_ms: Fix slab-use-after-free in rtsx_usb_ms_drv_remove
• BZ - 2363672 - CVE-2025-37797 kernel: net_sched: hfsc: Fix a UAF vulnerability in class handling
• BZ - 2373605 - CVE-2022-50200 kernel: selinux: Add boundary check in put_entry()
• BZ - 2373630 - CVE-2022-50020 kernel: ext4: avoid resizing to a partial cluster size
• BZ - 2373672 - CVE-2022-50022 kernel: drivers:md:fix a potential use-after-free bug
• BZ - 2375305 - CVE-2025-38086 kernel: net: ch9200: fix uninitialised access during mii_nway_restart

CVEs

• CVE-2022-50020
• CVE-2022-50022
• CVE-2022-50200
• CVE-2025-21727
• CVE-2025-21991
• CVE-2025-22020
• CVE-2025-37797
• CVE-2025-38086

References

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