Race condition in Linux kernel - CVE-2026-53050
Published: June 25, 2026
Vulnerability identifier: #VU135303
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-2026-53050
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a race condition in dquot_scan_active() and quota deactivation handling in the quota subsystem when scanning active dquots during quota deactivation. A local user can trigger the race to cause a denial of service.
Under memory pressure, the caller of dquot_scan_active() can end up working on a freed dquot.
How to mitigate CVE-2026-53050
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/2bdc80f4619411e5bd4a3ef23f51e14021ed457c
- https://git.kernel.org/stable/c/61e25f664dc2a08299e07d84c85776abc2350f75
- https://git.kernel.org/stable/c/6678dde265708003c2b42551af4a2e3cb05decd5
- https://git.kernel.org/stable/c/82cbdb4c1ebb5ea7d7bd45c18d3483b5bd32ebc1
- https://git.kernel.org/stable/c/ac8a2e0d287ebf35e5d7e51e260b4e146648ba4a
- https://git.kernel.org/stable/c/e93ab401da4b2e2c1b8ef2424de2f238d51c8b2d
- https://git.kernel.org/stable/c/f9438cb8c8ec3adc84b2b450a3aab0123d074c3b
- https://git.kernel.org/stable/c/fdd424d7c35633ac577fd87d1b043d1b8a6cd350