{"id":"CVE-2026-31676","revision":null,"records":[{"revision":"e62a66fe06c44953929a6379c1a4ce7e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-31676","aliases":[],"title":"rxrpc: only handle RESPONSE during service challenge","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: only handle RESPONSE during service challenge\n\nOnly process RESPONSE packets while the service connection is still in\nRXRPC_CONN_SERVICE_CHALLENGING. Check that state under state_lock before\nrunning response verification and security initialization, then use a local\nsecured flag to decide whether to queue the secured-connection work after\nthe state transition. This keeps duplicate or late RESPONSE packets from\nre-running the setup path and removes the unlocked post-transition state\ntest.","state":0,"publishedAt":"2026-04-25T08:46:52.285+00:00","modifiedAt":"2026-10-19T18:56:04.018+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/rxrpc/conn_event.c\"\n ],\n \"versions\": [\n {\n \"version\": \"17926a79320afa9b95df6b977b40cca6d8713cea\",\n \"lessThan\": \"a1a8efde03a40b6c658d580e96644d9b9a2a0d3a\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"17926a79320afa9b95df6b977b40cca6d8713cea\",\n \"lessThan\": \"6c3a0fbdafef8316e34ae22333e317a341e737cd\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"17926a79320afa9b95df6b977b40cca6d8713cea\",\n \"lessThan\": \"0afdfd4941c1b60a1f5c361760daa970edca60cd\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"17926a79320afa9b95df6b977b40cca6d8713cea\",\n \"lessThan\": \"a6bcf8010af093fe04f7100562e9542ab7882585\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"17926a79320afa9b95df6b977b40cca6d8713cea\",\n \"lessThan\": \"29b44d904dceb832be880def08b8cb17a0aba91c\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"17926a79320afa9b95df6b977b40cca6d8713cea\",\n \"lessThan\": \"d0035e634dae83237ab7f5681eb52b2f65d0ceb8\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"17926a79320afa9b95df6b977b40cca6d8713cea\",\n \"lessThan\": \"03fd2ef73cb4ffd0af100a95b634af54f474414e\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"17926a79320afa9b95df6b977b40cca6d8713cea\",\n \"lessThan\": \"c43ffdcfdbb5567b1f143556df8a04b4eeea041c\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/rxrpc/conn_event.c\"\n ],\n \"versions\": [\n {\n \"version\": \"2.6.22\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"2.6.22\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.258\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.209\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.175\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.136\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.84\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.23\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.19.13\",\n \"lessThanOrEqual\": \"6.19.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/a1a8efde03a40b6c658d580e96644d9b9a2a0d3a","https://git.kernel.org/stable/c/6c3a0fbdafef8316e34ae22333e317a341e737cd","https://git.kernel.org/stable/c/0afdfd4941c1b60a1f5c361760daa970edca60cd","https://git.kernel.org/stable/c/a6bcf8010af093fe04f7100562e9542ab7882585","https://git.kernel.org/stable/c/29b44d904dceb832be880def08b8cb17a0aba91c","https://git.kernel.org/stable/c/d0035e634dae83237ab7f5681eb52b2f65d0ceb8","https://git.kernel.org/stable/c/03fd2ef73cb4ffd0af100a95b634af54f474414e","https://git.kernel.org/stable/c/c43ffdcfdbb5567b1f143556df8a04b4eeea041c"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-31676","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-31676","identifiers":["CVE-2026-31676"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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