CVE-2026-31676

HighCVSS 7.5/10Last modified Nov 11, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-362

Affected software

VendorProductVersions
LinuxLinux>= 17926a79320afa9b95df6b977b40cca6d8713cea, < a1a8efde03a40b6c658d580e96644d9b9a2a0d3a; >= 17926a79320afa9b95df6b977b40cca6d8713cea, < 6c3a0fbdafef8316e34ae22333e317a341e737cd; >= 17926a79320afa9b95df6b977b40cca6d8713cea, < 0afdfd4941c1b60a1f5c361760daa970edca60cd; >= 17926a79320afa9b95df6b977b40cca6d8713cea, < a6bcf8010af093fe04f7100562e9542ab7882585; >= 17926a79320afa9b95df6b977b40cca6d8713cea, < 29b44d904dceb832be880def08b8cb17a0aba91c; >= 17926a79320afa9b95df6b977b40cca6d8713cea, < d0035e634dae83237ab7f5681eb52b2f65d0ceb8; >= 17926a79320afa9b95df6b977b40cca6d8713cea, < 03fd2ef73cb4ffd0af100a95b634af54f474414e; >= 17926a79320afa9b95df6b977b40cca6d8713cea, < c43ffdcfdbb5567b1f143556df8a04b4eeea041c
LinuxLinux2.6.22
SiemensSIMATIC S7-1500 TM MFP - GNU/Linux subsystem< *

References

Timeline

Published
Apr 25, 2026
Last modified
Nov 11, 2026
NVD status
Modified

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CVE-2026-31676: High severity, CVSS 7.5 | Vulnix