CVE-2026-31696
kernel: rxrpc: Fix missing validation of ticket length in non-XDR key preparsing
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 1, 2026
Updated · June 28, 2026
Description
A flaw was found in the Linux kernel's rxrpc component. An unprivileged user can exploit this by providing an excessively large ticket length during key preparsing. This improper validation leads to an oversized token calculation when the key is subsequently read, triggering a system warning and potentially causing a Denial of Service (DoS).
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-190 · Integer Overflow or Wraparound