CVE-2026-31676

rxrpc: only handle RESPONSE during service challenge

State: Published
Severity: 7.5 High
Published: Apr 25, 2026
Updated: Oct 19, 2026
Reserved: Mar 9, 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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	Linux

Weaknesses

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Affected Products

Product	Versions
LinuxLinux	17926a79320afa9b95df6b977b40cca6d8713cea to before a1a8efde03a40b6c658d580e96644d9b9a2a0d3aAffected 17926a79320afa9b95df6b977b40cca6d8713cea to before 6c3a0fbdafef8316e34ae22333e317a341e737cdAffected 17926a79320afa9b95df6b977b40cca6d8713cea to before 0afdfd4941c1b60a1f5c361760daa970edca60cdAffected 17926a79320afa9b95df6b977b40cca6d8713cea to before a6bcf8010af093fe04f7100562e9542ab7882585Affected 17926a79320afa9b95df6b977b40cca6d8713cea to before 29b44d904dceb832be880def08b8cb17a0aba91cAffected 17926a79320afa9b95df6b977b40cca6d8713cea to before d0035e634dae83237ab7f5681eb52b2f65d0ceb8Affected 17926a79320afa9b95df6b977b40cca6d8713cea to before 03fd2ef73cb4ffd0af100a95b634af54f474414eAffected 17926a79320afa9b95df6b977b40cca6d8713cea to before c43ffdcfdbb5567b1f143556df8a04b4eeea041cAffected
LinuxLinux	2.6.22Affected before 2.6.22Not affected 5.10.258 through 5.10.Not affected 5.15.209 through 5.15.Not affected 6.1.175 through 6.1.Not affected 6.6.136 through 6.6.Not affected 6.12.84 through 6.12.Not affected 6.18.23 through 6.18.Not affected 6.19.13 through 6.19.*Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

17926a79320afa9b95df6b977b40cca6d8713cea to before a1a8efde03a40b6c658d580e96644d9b9a2a0d3aAffected
17926a79320afa9b95df6b977b40cca6d8713cea to before 6c3a0fbdafef8316e34ae22333e317a341e737cdAffected
17926a79320afa9b95df6b977b40cca6d8713cea to before 0afdfd4941c1b60a1f5c361760daa970edca60cdAffected
17926a79320afa9b95df6b977b40cca6d8713cea to before a6bcf8010af093fe04f7100562e9542ab7882585Affected
17926a79320afa9b95df6b977b40cca6d8713cea to before 29b44d904dceb832be880def08b8cb17a0aba91cAffected
17926a79320afa9b95df6b977b40cca6d8713cea to before d0035e634dae83237ab7f5681eb52b2f65d0ceb8Affected
17926a79320afa9b95df6b977b40cca6d8713cea to before 03fd2ef73cb4ffd0af100a95b634af54f474414eAffected
17926a79320afa9b95df6b977b40cca6d8713cea to before c43ffdcfdbb5567b1f143556df8a04b4eeea041cAffected

LinuxLinux

2.6.22Affected
before 2.6.22Not affected
5.10.258 through 5.10.*Not affected
5.15.209 through 5.15.*Not affected
6.1.175 through 6.1.*Not affected
6.6.136 through 6.6.*Not affected
6.12.84 through 6.12.*Not affected
6.18.23 through 6.18.*Not affected
6.19.13 through 6.19.*Not affected
7.0 and laterNot affected

References

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