{"id":"CVE-2026-63980","revision":null,"records":[{"revision":"5a9b0095d42547ff8303cdba977fdac7","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-63980","aliases":[],"title":"net/handshake: Use spin_lock_bh for hn_lock","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/handshake: Use spin_lock_bh for hn_lock\n\nnvmet_tcp_state_change(), a socket callback that runs in BH context,\ncan reach handshake_req_cancel() via nvmet_tcp_schedule_release_queue()\nand tls_handshake_cancel().  handshake_req_cancel() acquires\nhn->hn_lock with plain spin_lock().  If a process-context thread on\nthe same CPU holds hn->hn_lock when a softirq invokes the cancel path,\nthe lock attempt deadlocks.  This is the only caller that invokes\ntls_handshake_cancel() from BH context; every other consumer calls it\nfrom process context.\n\nDeferring the cancel to process context in the NVMe target is not\nstraightforward: nvmet_tcp_schedule_release_queue() must call\ntls_handshake_cancel() atomically with its state transition to\nDISCONNECTING.  If the cancel were deferred, the handshake completion\ncallback could fire in the window before the cancel runs, observe the\nunexpected state, and return without dropping its kref on the queue.\nReworking that interlock is considerably more invasive than hardening\nthe handshake lock.  Convert all hn->hn_lock acquisitions from\nspin_lock/spin_unlock to spin_lock_bh/spin_unlock_bh so the lock is\nnever taken with softirqs enabled.","state":0,"publishedAt":"2026-07-19T14:56:03.887+00:00","modifiedAt":"2026-10-19T20:18:00.627+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/handshake/netlink.c\",\n                        \"net/handshake/request.c\",\n                        \"net/handshake/tlshd.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"675b453e024154dd547921c6e6d5b58747ba7e0e\",\n                            \"lessThan\": \"06ab5978866fc2221b910347fd3e510ca8e7b1a4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"675b453e024154dd547921c6e6d5b58747ba7e0e\",\n                            \"lessThan\": \"0866569fc36a56f568acd3900d354e3505932e09\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"675b453e024154dd547921c6e6d5b58747ba7e0e\",\n                            \"lessThan\": \"91898de9501a047ba67c6b864dcd403e00bdfbf5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"675b453e024154dd547921c6e6d5b58747ba7e0e\",\n                            \"lessThan\": \"cc993e0927ec8bd98ea33377ada03295fcda0f24\",\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/handshake/netlink.c\",\n                        \"net/handshake/request.c\",\n                        \"net/handshake/tlshd.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.7\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.7\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.93\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.35\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.12\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\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/06ab5978866fc2221b910347fd3e510ca8e7b1a4","https://git.kernel.org/stable/c/0866569fc36a56f568acd3900d354e3505932e09","https://git.kernel.org/stable/c/91898de9501a047ba67c6b864dcd403e00bdfbf5","https://git.kernel.org/stable/c/cc993e0927ec8bd98ea33377ada03295fcda0f24"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-63980","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-63980","identifiers":["CVE-2026-63980"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-08T18:47:41.4173610+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-08T18:47:41.417361+00:00","lastSuccessAt":"2026-11-08T18:47:41.7283234+00:00","error":null,"lastVerifiedAt":"2026-11-08T18:47:41.7283259+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-eaa64dac63caa79c8d4905619258c41c51b39e461b996124e1a21b5e85e7e738-dbcef0bc251cc0408612c25b5776814de6f090ce0603fee39c9e27142c709d0f","complete":true,"records":421231,"lastAttemptAt":"2026-11-08T18:47:40.8513896+00:00","lastSuccessAt":"2026-11-08T18:47:40.7361933+00:00","error":null,"lastVerifiedAt":"2026-11-08T18:47:40.8513896+00:00","snapshotPublishedAt":"2026-11-08T18:28:45+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-db1b57b5c8cf41498e207884b3f1235b","complete":true,"records":13654,"lastAttemptAt":"2026-11-08T18:47:45.2749951+00:00","lastSuccessAt":"2026-11-08T17:47:46.718+00:00","error":null,"lastVerifiedAt":"2026-11-08T17:47:46.718+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13706,"expectedIdentifiers":13706,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-08T18:47:41.4173610+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-08T18:47:41.417361+00:00","lastSuccessAt":"2026-11-08T18:47:41.7296264+00:00","error":null,"lastVerifiedAt":"2026-11-08T18:47:41.7296273+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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