Improper resource shutdown or release in Linux kernel - CVE-2026-31440
Published: April 24, 2026
Vulnerability identifier: #VU127707
CSH Severity: Low
CVSS v4.0: 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-2026-31440
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 idxd dmaengine driver when removing a device after a reset. A local user can trigger device removal to cause a denial of service.
The issue occurs because the reset clears configuration registers before event log memory deallocation is checked.
How to mitigate CVE-2026-31440
Install security update from vendor's repository.