Use-after-free in Linux kernel - CVE-2026-45981
Published: May 28, 2026
Vulnerability identifier: #VU132506
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-2026-45981
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 a use-after-free or double free in css_alloc_subchannel() when handling failures from DMA mask setup. A local user can trigger the affected error path to cause a denial of service.
The issue occurs after device_initialize() has been called and the embedded device object is freed directly instead of being released through the device model reference counting mechanism.
How to mitigate CVE-2026-45981
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/2b2ad7ad4a28ffdb9f94e6d979b88a5b12b71681
- https://git.kernel.org/stable/c/6715560527e343a387e4a0d2e6c401748e89fa55
- https://git.kernel.org/stable/c/abb6e07f46a740cda4f07d1b561ae4eaa7a1df42
- https://git.kernel.org/stable/c/b1d4e6fb241672850296956c4d782a69363a3807
- https://git.kernel.org/stable/c/c35cfbb5341ba05ad1b4476ffc3c21cc3ff8f603
- https://git.kernel.org/stable/c/f65c75b0b9b5a390bc3beadcde0a6fbc3ad118f7
- https://git.kernel.org/stable/c/f96c5ccf95ae5f27218c1ce2d6a3ad2d3e105424
- https://git.kernel.org/stable/c/fd295a75d828c11acfcc6869c2a12cdaaf9b7722