{"id":"CVE-2026-89536","revision":"6b30e0a498e646a4b6f37ba0c0ecc811","records":[{"revision":"6b30e0a498e646a4b6f37ba0c0ecc811","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89536","aliases":[],"title":"SUNRPC: wait for in-flight client TLS handshake callback","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: wait for in-flight client TLS handshake callback\n\nxs_tls_handshake_sync() gives xs_tls_handshake_done() a reference to the\nlower transport before submitting the handshake request. On timeout or\nsignal, the synchronous waiter drops that reference after calling\ntls_handshake_cancel().\n\nhandshake_req_cancel() returns false when handshake_complete() has\nalready marked the request complete. In that case the completion callback\ncan still be running, so dropping the callback-owned reference in the\nwaiter can free the lower transport before xs_tls_handshake_done() stores\nxprt_err or drops its own reference.\n\nIf cancellation loses to completion, wait until xs_tls_handshake_done()\nsignals handshake_done and let the callback release its reference. This\nmirrors the server-side handshake lifetime handling and keeps the timeout\nor signal return value unchanged.","state":0,"publishedAt":"2026-09-11T19:44:14.473+00:00","modifiedAt":"2026-10-19T08:48:28.03+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/sunrpc/xprtsock.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"75eb6af7acdf566c68d61e98e67ee2f235201c02\",\n                            \"lessThan\": \"fb43997407bc17ee39bac81ab708101312e255f5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"75eb6af7acdf566c68d61e98e67ee2f235201c02\",\n                            \"lessThan\": \"15431820f448e09f8029b670d5c82aa5917d4625\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"75eb6af7acdf566c68d61e98e67ee2f235201c02\",\n                            \"lessThan\": \"1de391e8b94e31b45c19c16dbf315e294810c7de\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"75eb6af7acdf566c68d61e98e67ee2f235201c02\",\n                            \"lessThan\": \"7fbb6d2ab0391eb8d1f1a68e6bc263ef02cea61b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"75eb6af7acdf566c68d61e98e67ee2f235201c02\",\n                            \"lessThan\": \"a89dd597458848b463d284b15e42a8078beeb046\",\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/sunrpc/xprtsock.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.5\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.5\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.109\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\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:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/fb43997407bc17ee39bac81ab708101312e255f5","https://git.kernel.org/stable/c/15431820f448e09f8029b670d5c82aa5917d4625","https://git.kernel.org/stable/c/1de391e8b94e31b45c19c16dbf315e294810c7de","https://git.kernel.org/stable/c/7fbb6d2ab0391eb8d1f1a68e6bc263ef02cea61b","https://git.kernel.org/stable/c/a89dd597458848b463d284b15e42a8078beeb046"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89536","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89536","identifiers":["CVE-2026-89536"]},"retained":false,"historicalAffected":[]}],"coverage":[]}