Improper resource shutdown or release in Linux kernel - CVE-2026-31661
Published: April 25, 2026
Vulnerability identifier: #VU127739
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-2026-31661
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 memory management in the brcmsmac driver when freeing DMA-coherent memory. A local user can trigger the vulnerable code path to cause a denial of service.
How to mitigate CVE-2026-31661
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/01f1330d3d1bee07e0c42d40cc48b7be8b6dad84
- https://git.kernel.org/stable/c/0f87777b74bcce29b966ec42d9aa8f9edd9b1667
- https://git.kernel.org/stable/c/12cd7632757a54ce586e36040210b1a738a0fc53
- https://git.kernel.org/stable/c/3c204a0fd079fa7a867151a47d830ad1c2db5177
- https://git.kernel.org/stable/c/4bf41c2731a0549e21f66180ff780b1e036639ab
- https://git.kernel.org/stable/c/77263f053963dea9f3962505ac0c768853d7dc59
- https://git.kernel.org/stable/c/b27fa888e4a426a3bcf6f6ab24701d888d9bf5aa
- https://git.kernel.org/stable/c/f449676bab54fea1440775c8c915dadb323fe015