Improper locking in Linux kernel - CVE-2025-21911

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Main Vulnerability Database Vulnerabilities #VU106794

Improper locking in Linux kernel - CVE-2025-21911

Published: April 2, 2025 / Updated: May 11, 2025


Vulnerability identifier: #VU106794
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-21911
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability: No public exploit available
Affected software:
Linux kernel
Ubuntu
linux (Ubuntu package)
linux-hwe-6.8 (Ubuntu package)
linux-azure-nvidia (Ubuntu package)
linux-azure (Ubuntu package)
linux-ibm (Ubuntu package)
linux-oracle (Ubuntu package)
linux-oracle-6.8 (Ubuntu package)
linux-aws-6.8 (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-raspi (Ubuntu package)
linux-raspi-realtime (Ubuntu package)
linux-realtime (Ubuntu package)
linux-realtime-6.8 (Ubuntu package)
linux-lowlatency (Ubuntu package)
linux-oem-6.11 (Ubuntu package)

Detailed vulnerability description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the pvr_queue_fence_get_driver_name() and pvr_queue_fence_init() functions in drivers/gpu/drm/imagination/pvr_queue.c. A local user can perform a denial of service (DoS) attack.


How to mitigate CVE-2025-21911

Install update from vendor's website.

Sources