CVE-2026-31676

high

Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: only handle RESPONSE during service challenge Only process RESPONSE packets while the service connection is still in RXRPC_CONN_SERVICE_CHALLENGING. Check that state under state_lock before running response verification and security initialization, then use a local secured flag to decide whether to queue the secured-connection work after the state transition. This keeps duplicate or late RESPONSE packets from re-running the setup path and removes the unlocked post-transition state test.

References

https://git.kernel.org/stable/c/d0035e634dae83237ab7f5681eb52b2f65d0ceb8

https://git.kernel.org/stable/c/c43ffdcfdbb5567b1f143556df8a04b4eeea041c

https://git.kernel.org/stable/c/a6bcf8010af093fe04f7100562e9542ab7882585

https://git.kernel.org/stable/c/29b44d904dceb832be880def08b8cb17a0aba91c

https://git.kernel.org/stable/c/03fd2ef73cb4ffd0af100a95b634af54f474414e

Details

Source: Mitre, NVD

Published: 2026-04-25

Updated: 2026-05-06

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High

EPSS

EPSS: 0.00017