#VU124950 Memory leak in Linux kernel - CVE-2026-23421
Published: April 6, 2026
Vulnerability identifier: #VU124950
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-23421
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a memory leak in drm/xe configfs device release handling when removing a configfs device. A local user can trigger device removal after allocating ctx_restore_mid_bb to cause a denial of service.
The issue occurs because ctx_restore_mid_bb[0].cs is not freed, which can leak memory during configfs device removal.
Remediation
Install security update from vendor's repository.