{"id":"CVE-2026-31676","summary":"rxrpc: only handle RESPONSE during service challenge","details":"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.","modified":"2026-07-08T07:32:31.554473799Z","published":"2026-04-25T08:46:52.285Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31676.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/03fd2ef73cb4ffd0af100a95b634af54f474414e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/0afdfd4941c1b60a1f5c361760daa970edca60cd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/29b44d904dceb832be880def08b8cb17a0aba91c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6c3a0fbdafef8316e34ae22333e317a341e737cd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a1a8efde03a40b6c658d580e96644d9b9a2a0d3a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a6bcf8010af093fe04f7100562e9542ab7882585"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c43ffdcfdbb5567b1f143556df8a04b4eeea041c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d0035e634dae83237ab7f5681eb52b2f65d0ceb8"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31676.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31676"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"17926a79320afa9b95df6b977b40cca6d8713cea"},{"fixed":"a1a8efde03a40b6c658d580e96644d9b9a2a0d3a"},{"fixed":"6c3a0fbdafef8316e34ae22333e317a341e737cd"},{"fixed":"0afdfd4941c1b60a1f5c361760daa970edca60cd"},{"fixed":"a6bcf8010af093fe04f7100562e9542ab7882585"},{"fixed":"29b44d904dceb832be880def08b8cb17a0aba91c"},{"fixed":"d0035e634dae83237ab7f5681eb52b2f65d0ceb8"},{"fixed":"03fd2ef73cb4ffd0af100a95b634af54f474414e"},{"fixed":"c43ffdcfdbb5567b1f143556df8a04b4eeea041c"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31676.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.22"},{"fixed":"5.10.258"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.209"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.175"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.136"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.84"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.23"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.13"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31676.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}