Use-after-free in Linux kernel - CVE-2026-31584
Published: April 25, 2026
Vulnerability identifier: #VU127810
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-2026-31584
CWE-ID: CWE-416
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 use-after-free in fops_vcodec_release() and the mtk_venc_worker workqueue handler when releasing an encoder context while queued or running encode work is still active. A local user can trigger the encoder release path during encode operations to cause a denial of service.
The issue is caused by a race condition between the release path and the workqueue lifecycle after the multimedia job is considered complete.
How to mitigate CVE-2026-31584
Install security update from vendor's repository.