RHSA-2025:21082 - Security Advisory

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support.

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: HID: core: fix shift-out-of-bounds in hid_report_raw_event (CVE-2022-48978)
• 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: HID: core: Harden s32ton() against conversion to 0 bits (CVE-2025-38556)
• kernel: ALSA: hda/ca0132: Fix buffer overflow in add_tuning_control (CVE-2025-39751)
• kernel: crypto: seqiv - Handle EBUSY correctly (CVE-2023-53373)

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 for x86_64 - Extended Life Cycle Support 7 x86_64

Fixes

• BZ - 2320665 - CVE-2022-48978 kernel: HID: core: fix shift-out-of-bounds in hid_report_raw_event
• 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 - 2389456 - CVE-2025-38556 kernel: HID: core: Harden s32ton() against conversion to 0 bits
• BZ - 2394624 - CVE-2025-39751 kernel: ALSA: hda/ca0132: Fix buffer overflow in add_tuning_control
• BZ - 2396379 - CVE-2023-53373 kernel: crypto: seqiv - Handle EBUSY correctly

CVEs

• CVE-2022-48978
• CVE-2023-53373
• CVE-2025-22026
• CVE-2025-37797
• CVE-2025-38556
• CVE-2025-39751

References

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