{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-93231","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-17T16:02:15.095Z","datePublished":"2026-09-24T15:29:19.786Z","dateUpdated":"2026-10-03T10:57:07.947Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-10-03T10:57:07.947Z"},"descriptions":[{"lang":"en","value":"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 ]"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/lockd/lockd.h","fs/lockd/svcsubs.c"],"versions":[{"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"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/lockd/lockd.h","fs/lockd/svcsubs.c"],"versions":[{"version":"2.6.26","status":"affected"},{"version":"0","lessThan":"2.6.26","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-rc1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"6.18.51"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"7.2.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"7.3-rc1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/d34c2ac447fe0490ede828e0143e2cbcb59e6c77"},{"url":"https://git.kernel.org/stable/c/0d72e78c9d38d5377a059a4837f82b65b91cdcf6"},{"url":"https://git.kernel.org/stable/c/21bcb609e0ab1dd60f39ca3498f85808933bcc9f"},{"url":"https://git.kernel.org/stable/c/b9060689f49dc663e9a3d069c4a65ff63a836e66"}],"title":"lockd: fix swapped arguments in nlmsvc_match_ip()","x_generator":{"engine":"bippy-1.2.0"}}}}