Improper resource shutdown or release in Linux kernel - CVE-2026-63861
Published: July 20, 2026
Vulnerability identifier: #VU138802
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-2026-63861
CWE-ID: CWE-404
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 improper resource shutdown or release in the mtk_snand_probe() logic of the mtk-snfi driver when handling device probe failures or device removal. A local user can trigger device initialization and cleanup paths to cause a denial of service.
How to mitigate CVE-2026-63861
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/3e79a563377a319d016ed0d3cd8c43171670c0f3
- https://git.kernel.org/stable/c/6aea4a99410615912d80a4ba0827c4e8d4a8312d
- https://git.kernel.org/stable/c/86357e1d0157d8408b78f8768a69ab263d010316
- https://git.kernel.org/stable/c/98cf4b58299e0c6a537c68cd32155d9e7569e7cb
- https://git.kernel.org/stable/c/ab00febad191d7a4400aa1c3468279fb508258d4
- https://git.kernel.org/stable/c/e0b049bd7b279d7b6ad22a637cddced93198a51b