Type Confusion in Linux kernel - CVE-2026-46081
Published: May 27, 2026
Vulnerability identifier: #VU132409
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-2026-46081
CWE-ID: CWE-843
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 memory corruption in acomp_reqchain_done() when processing asynchronous compression request completion for requests using the DMA virtual address interface. A local user can trigger an asynchronous compression request through a hardware implementation such as the QAT driver to cause a denial of service.
The issue is triggered when the request follows the acomp_do_req_chain() path and the asynchronous completion callback receives a pointer to the chain member instead of the request structure.
How to mitigate CVE-2026-46081
Install security update from vendor's repository.