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Vulnerability record · CVE-2026-31676 · published 25 April 2026

CVE-2026-31676: Linux kernel vulnerability

Linux · Linux Kernel

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.

7.5 CVSS 3.1 High EPSS 0.72% · top 48.1%
7.5CVSS 3.1 base score
0.72%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/03fd2ef73cb4ffd0af100a95b634af54f474414e Patch
https://git.kernel.org/stable/c/0afdfd4941c1b60a1f5c361760daa970edca60cd
https://git.kernel.org/stable/c/29b44d904dceb832be880def08b8cb17a0aba91c Patch
https://git.kernel.org/stable/c/6c3a0fbdafef8316e34ae22333e317a341e737cd
https://git.kernel.org/stable/c/a1a8efde03a40b6c658d580e96644d9b9a2a0d3a
https://git.kernel.org/stable/c/a6bcf8010af093fe04f7100562e9542ab7882585 Patch
https://git.kernel.org/stable/c/c43ffdcfdbb5567b1f143556df8a04b4eeea041c Patch
https://git.kernel.org/stable/c/d0035e634dae83237ab7f5681eb52b2f65d0ceb8 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-31676), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.