{"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": "2026-09-24T15:29:19.786Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-24T15:29:19.786Z"}, "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": "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": "6.18.51", "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": "6.18.51"}, {"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/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"}}}}