CVE-2026-31676

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux17926a79320afa9b95df6b977b40cca6d8713cea < a1a8efde03a40b6c658d580e96644d9b9a2a0d3aaffected
LinuxLinux17926a79320afa9b95df6b977b40cca6d8713cea < 6c3a0fbdafef8316e34ae22333e317a341e737cdaffected
LinuxLinux17926a79320afa9b95df6b977b40cca6d8713cea < 0afdfd4941c1b60a1f5c361760daa970edca60cdaffected
LinuxLinux17926a79320afa9b95df6b977b40cca6d8713cea < a6bcf8010af093fe04f7100562e9542ab7882585affected
LinuxLinux17926a79320afa9b95df6b977b40cca6d8713cea < 29b44d904dceb832be880def08b8cb17a0aba91caffected
LinuxLinux17926a79320afa9b95df6b977b40cca6d8713cea < d0035e634dae83237ab7f5681eb52b2f65d0ceb8affected
LinuxLinux17926a79320afa9b95df6b977b40cca6d8713cea < 03fd2ef73cb4ffd0af100a95b634af54f474414eaffected
LinuxLinux17926a79320afa9b95df6b977b40cca6d8713cea < c43ffdcfdbb5567b1f143556df8a04b4eeea041caffected
LinuxLinux2.6.22affected
LinuxLinux0 < 2.6.22unaffected
LinuxLinux5.10.258 <= 5.10.*unaffected
LinuxLinux5.15.209 <= 5.15.*unaffected
LinuxLinux6.1.175 <= 6.1.*unaffected
LinuxLinux6.6.136 <= 6.6.*unaffected
LinuxLinux6.12.84 <= 6.12.*unaffected
LinuxLinux6.18.23 <= 6.18.*unaffected
LinuxLinux6.19.13 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References