Always-Incorrect Control Flow Implementation in Linux kernel - CVE-2026-31640
Published: April 25, 2026
Vulnerability identifier: #VU127754
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-31640
CWE-ID: CWE-670
Exploitation vector: Remote 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 logic in rxrpc_post_response() when processing queued RESP challenge responses. A local user can trigger the handling of crafted response packets to cause a denial of service.
How to mitigate CVE-2026-31640
Install security update from vendor's repository.