CVE-2026-31676

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.

• https://git.kernel.org/stable/c/03fd2ef73cb4ffd0af100a95b634af54f474414ePatch
• https://git.kernel.org/stable/c/0afdfd4941c1b60a1f5c361760daa970edca60cd
• https://git.kernel.org/stable/c/29b44d904dceb832be880def08b8cb17a0aba91cPatch
• https://git.kernel.org/stable/c/6c3a0fbdafef8316e34ae22333e317a341e737cd
• https://git.kernel.org/stable/c/a1a8efde03a40b6c658d580e96644d9b9a2a0d3a
• https://git.kernel.org/stable/c/a6bcf8010af093fe04f7100562e9542ab7882585Patch
• https://git.kernel.org/stable/c/c43ffdcfdbb5567b1f143556df8a04b4eeea041cPatch
• https://git.kernel.org/stable/c/d0035e634dae83237ab7f5681eb52b2f65d0ceb8Patch

Published

Apr 25, 2026

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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