PT-2025-14292 · Linux+6 · Linux Kernel+6

Published 2025-02-26 · Updated 2026-04-20 · CVE-2025-21911

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A deadlock issue in the Linux kernel has been resolved. The problem occurred when the fence release processing was not properly handled, leading to potential recursive locking detected warnings. This issue was addressed by scheduling the fence release processing on a workqueue instead of in the release function itself. The fix prevents deadlocks such as the one that occurred when the weston:zfq0/24149 task tried to acquire the reservation ww class mutex lock while already holding it.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Improper Locking

Weakness Enumeration

CWE-667

Related Identifiers

ALSA-2025_16880

ALT-PU-2025-5786

BDU:2025-04822

CVE-2025-21911

SUSE-SU-2025:02254-1

SUSE-SU-2025:02307-1

SUSE-SU-2025:02333-1

SUSE-SU-2025_02254-1

SUSE-SU-2025_02307-1

SUSE-SU-2025_02333-1

USN-7605-1

USN-7605-2

USN-7606-1

USN-7628-1

USN-7764-1

USN-7764-2

USN-7765-1

USN-7766-1

USN-7767-1

USN-7767-2

USN-7779-1

USN-7790-1

USN-7800-1

USN-7801-1

USN-7801-2

USN-7801-3

USN-7802-1

USN-7809-1

Affected Products

Alt Linux

Astra Linux

Linuxmint

Linux Kernel

Red Os

Suse

Ubuntu

References · 843

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21911.json · Exploit
• https://ubuntu.com/security/CVE-2025-22046 · Vendor Advisory
• https://git.kernel.org/stable/c/d993ae7360923efd6ade43a32043459a121c28c1 · Patch
• https://osv.dev/vulnerability/USN-7767-2 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-58092 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-22035 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21959 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21919 · Vendor Advisory
• https://osv.dev/vulnerability/USN-7764-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-37798 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-2312 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-21911 · Security Note
• https://ubuntu.com/security/CVE-2025-21978 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-7800-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-21911 · Vendor Advisory