{"schema":"threatline.record/2","record":{"id":"CVE-2026-93231","aliases":[],"summary":"lockd: fix swapped arguments in nlmsvc_match_ip()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nlockd: fix swapped arguments in nlmsvc_match_ip()\n\nWhen releasing locks by server IP address via /proc/fs/nfsd/unlock_ip,\nnlmsvc_unlock_all_by_ip() calls nlm_traverse_files() with the server\nsockaddr as the opaque @data argument:\n\n\tnlm_traverse_files(server_addr, nlmsvc_match_ip, NULL);\n\nThe match callback is later invoked from nlm_traverse_locks() as:\n\n\tmatch(lockhost, host);\n\nwhere the first argument is the nlm_host that owns the lock, and the\nsecond argument is the @data that was originally passed down (here the\nserver sockaddr).  This is the convention every other match callback\nrelies on (nlmsvc_mark_host(), nlmsvc_same_host(), nlmsvc_is_client()):\narg1 is the real nlm_host, arg2 is the caller-supplied reference value.\n\nnlmsvc_match_ip() has had these two arguments reversed ever since the\nunlock-by-IP feature was introduced in commit 4373ea84c84d (\"lockd:\nunlock lockd locks associated with a given server ip\"):\n\n\treturn rpc_cmp_addr(nlm_srcaddr(host), datap);\n\nHere @host is actually the server sockaddr, so nlm_srcaddr(host)\ndereferences a struct sockaddr as a struct nlm_host and reads garbage\nat the offset of h_srcaddr; meanwhile @datap is actually the lock\nowner's nlm_host but is compared as a sockaddr.  As a result the\ncomparison practically never matches and locks are not released for the\nrequested IP.\n\nSwap the arguments so the lock owner's source address is compared\nagainst the requested server address:\n\n\treturn rpc_cmp_addr(nlm_srcaddr(datap), (struct sockaddr *)host);\n\n[ cel: fix the misleading typedef parameter names too ]","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93231","source_modified_at":"2026-10-21T12:52:26.223Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"4373ea84c84d8a96e99d3da99e813d3e36d1bd11","lessThan":"4fe2db296c9cd897dd1fe06cc0ae9cbc13beefc5","status":"affected","versionType":"git"},{"version":"4373ea84c84d8a96e99d3da99e813d3e36d1bd11","lessThan":"d34c2ac447fe0490ede828e0143e2cbcb59e6c77","status":"affected","versionType":"git"},{"version":"4373ea84c84d8a96e99d3da99e813d3e36d1bd11","lessThan":"0d72e78c9d38d5377a059a4837f82b65b91cdcf6","status":"affected","versionType":"git"},{"version":"4373ea84c84d8a96e99d3da99e813d3e36d1bd11","lessThan":"21bcb609e0ab1dd60f39ca3498f85808933bcc9f","status":"affected","versionType":"git"},{"version":"4373ea84c84d8a96e99d3da99e813d3e36d1bd11","lessThan":"b9060689f49dc663e9a3d069c4a65ff63a836e66","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93231","source_modified_at":"2026-10-21T12:52:26.223Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"2.6.26","status":"affected"},{"version":"0","lessThan":"2.6.26","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.51","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.4","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93231","source_modified_at":"2026-10-21T12:52:26.223Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"4fe2db296c9cd897dd1fe06cc0ae9cbc13beefc5","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93231","source_modified_at":"2026-10-21T12:52:26.223Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"0d72e78c9d38d5377a059a4837f82b65b91cdcf6","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93231","source_modified_at":"2026-10-21T12:52:26.223Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"21bcb609e0ab1dd60f39ca3498f85808933bcc9f","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00168,"percentile":0.05721,"score_date":"2026-10-23"},"published_at":"2026-09-24T15:29:19.786Z","modified_at":"2026-10-21T12:52:26.223Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-93231","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T12:52:26.223Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-93231","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/4fe2db296c9cd897dd1fe06cc0ae9cbc13beefc5"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/d34c2ac447fe0490ede828e0143e2cbcb59e6c77"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/0d72e78c9d38d5377a059a4837f82b65b91cdcf6"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/21bcb609e0ab1dd60f39ca3498f85808933bcc9f"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/b9060689f49dc663e9a3d069c4a65ff63a836e66"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-21T12:52:26.223Z","content_hash":"c45044496fb5dc22acdc6fc22b085de3f6f1040bcda7b480d24eb9245148ac2d"}}