{"api_version":"1","generated_at":"2026-08-22T02:57:02+00:00","cve":"CVE-2026-72218","urls":{"html":"https://cve.report/CVE-2026-72218","api":"https://cve.report/api/cve/CVE-2026-72218.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-72218","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-72218"},"summary":{"title":"lockd: Plug nlm_file refcount leak on cached nlm_do_fopen() failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nlockd: Plug nlm_file refcount leak on cached nlm_do_fopen() failure\n\nThe cached-file path in nlm_lookup_file() reaches the found: label\nunconditionally, even when nlm_do_fopen() fails. At that label\n*result and file->f_count are updated before the error is returned.\nThe wrappers nlm3svc_lookup_file() and nlm4svc_lookup_file() then\nbail out of their switch without copying *result back to their\ncaller, so the proc handler's local nlm_file pointer remains NULL\nand the cleanup path skips nlm_release_file(). The f_count\nincrement is never released, and nlm_traverse_files() can no\nlonger reap the file because its refcount never returns to zero\nbetween requests.\n\nShort-circuit the cached path so neither *result nor f_count is\ntouched when nlm_do_fopen() fails on a hashed nlm_file.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:21:40","updated_at":"2026-08-17 06:18:22"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/46d59ff421824b6483549d87f14efffbbbd1f6cb","name":"https://git.kernel.org/stable/c/46d59ff421824b6483549d87f14efffbbbd1f6cb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/84008bf1860e0ef8059a7583a1163f36b704d08a","name":"https://git.kernel.org/stable/c/84008bf1860e0ef8059a7583a1163f36b704d08a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fe3b45b56b6c3d4b6b341de27fa291005287a21c","name":"https://git.kernel.org/stable/c/fe3b45b56b6c3d4b6b341de27fa291005287a21c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cb3420c047957e565101585bb4f15e1a6e3de6b0","name":"https://git.kernel.org/stable/c/cb3420c047957e565101585bb4f15e1a6e3de6b0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3a5c55a19cad62f2973be25fe96a1a9e7f618e8a","name":"https://git.kernel.org/stable/c/3a5c55a19cad62f2973be25fe96a1a9e7f618e8a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/70a38f87bed7f0694fd07988b47b2db1e10d8df3","name":"https://git.kernel.org/stable/c/70a38f87bed7f0694fd07988b47b2db1e10d8df3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7ce4c23e783e766507b2cef27bbf97e9ca944f1a","name":"https://git.kernel.org/stable/c/7ce4c23e783e766507b2cef27bbf97e9ca944f1a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6cd84cefd8b73e85b9eda17b319bd40a670f3a38","name":"https://git.kernel.org/stable/c/6cd84cefd8b73e85b9eda17b319bd40a670f3a38","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72218","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72218","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e580323ac0b51ad10ec2e181d1f777479b7983e7 6cd84cefd8b73e85b9eda17b319bd40a670f3a38 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 fe3b45b56b6c3d4b6b341de27fa291005287a21c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 cb3420c047957e565101585bb4f15e1a6e3de6b0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 7ce4c23e783e766507b2cef27bbf97e9ca944f1a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.261 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.212 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"72218","cve":"CVE-2026-72218","epss":"0.002100000","percentile":"0.115310000","score_date":"2026-08-17","updated_at":"2026-08-18 00:11:47"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/lockd/svcsubs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"6cd84cefd8b73e85b9eda17b319bd40a670f3a38","status":"affected","version":"e580323ac0b51ad10ec2e181d1f777479b7983e7","versionType":"git"},{"lessThan":"fe3b45b56b6c3d4b6b341de27fa291005287a21c","status":"affected","version":"7f024fcd5c97dc70bb9121c80407cf3cf9be7159","versionType":"git"},{"lessThan":"cb3420c047957e565101585bb4f15e1a6e3de6b0","status":"affected","version":"7f024fcd5c97dc70bb9121c80407cf3cf9be7159","versionType":"git"},{"lessThan":"7ce4c23e783e766507b2cef27bbf97e9ca944f1a","status":"affected","version":"7f024fcd5c97dc70bb9121c80407cf3cf9be7159","versionType":"git"},{"lessThan":"84008bf1860e0ef8059a7583a1163f36b704d08a","status":"affected","version":"7f024fcd5c97dc70bb9121c80407cf3cf9be7159","versionType":"git"},{"lessThan":"46d59ff421824b6483549d87f14efffbbbd1f6cb","status":"affected","version":"7f024fcd5c97dc70bb9121c80407cf3cf9be7159","versionType":"git"},{"lessThan":"3a5c55a19cad62f2973be25fe96a1a9e7f618e8a","status":"affected","version":"7f024fcd5c97dc70bb9121c80407cf3cf9be7159","versionType":"git"},{"lessThan":"70a38f87bed7f0694fd07988b47b2db1e10d8df3","status":"affected","version":"7f024fcd5c97dc70bb9121c80407cf3cf9be7159","versionType":"git"},{"lessThan":"5.10.261","status":"affected","version":"5.10.220","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/lockd/svcsubs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.15"},{"lessThan":"5.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.261","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.212","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.261","versionStartIncluding":"5.10.220","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.212","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"5.15","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nlockd: Plug nlm_file refcount leak on cached nlm_do_fopen() failure\n\nThe cached-file path in nlm_lookup_file() reaches the found: label\nunconditionally, even when nlm_do_fopen() fails. At that label\n*result and file->f_count are updated before the error is returned.\nThe wrappers nlm3svc_lookup_file() and nlm4svc_lookup_file() then\nbail out of their switch without copying *result back to their\ncaller, so the proc handler's local nlm_file pointer remains NULL\nand the cleanup path skips nlm_release_file(). The f_count\nincrement is never released, and nlm_traverse_files() can no\nlonger reap the file because its refcount never returns to zero\nbetween requests.\n\nShort-circuit the cached path so neither *result nor f_count is\ntouched when nlm_do_fopen() fails on a hashed nlm_file."}],"providerMetadata":{"dateUpdated":"2026-08-17T05:10:33.204Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/6cd84cefd8b73e85b9eda17b319bd40a670f3a38"},{"url":"https://git.kernel.org/stable/c/fe3b45b56b6c3d4b6b341de27fa291005287a21c"},{"url":"https://git.kernel.org/stable/c/cb3420c047957e565101585bb4f15e1a6e3de6b0"},{"url":"https://git.kernel.org/stable/c/7ce4c23e783e766507b2cef27bbf97e9ca944f1a"},{"url":"https://git.kernel.org/stable/c/84008bf1860e0ef8059a7583a1163f36b704d08a"},{"url":"https://git.kernel.org/stable/c/46d59ff421824b6483549d87f14efffbbbd1f6cb"},{"url":"https://git.kernel.org/stable/c/3a5c55a19cad62f2973be25fe96a1a9e7f618e8a"},{"url":"https://git.kernel.org/stable/c/70a38f87bed7f0694fd07988b47b2db1e10d8df3"}],"title":"lockd: Plug nlm_file refcount leak on cached nlm_do_fopen() failure","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-72218","datePublished":"2026-08-15T05:54:11.672Z","dateReserved":"2026-08-09T03:40:39.913Z","dateUpdated":"2026-08-17T05:10:33.204Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:21:40","lastModifiedDate":"2026-08-17 06:18:22","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"72218","Ordinal":"1","Title":"lockd: Plug nlm_file refcount leak on cached nlm_do_fopen() fail","CVE":"CVE-2026-72218","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"72218","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nlockd: Plug nlm_file refcount leak on cached nlm_do_fopen() failure\n\nThe cached-file path in nlm_lookup_file() reaches the found: label\nunconditionally, even when nlm_do_fopen() fails. At that label\n*result and file->f_count are updated before the error is returned.\nThe wrappers nlm3svc_lookup_file() and nlm4svc_lookup_file() then\nbail out of their switch without copying *result back to their\ncaller, so the proc handler's local nlm_file pointer remains NULL\nand the cleanup path skips nlm_release_file(). The f_count\nincrement is never released, and nlm_traverse_files() can no\nlonger reap the file because its refcount never returns to zero\nbetween requests.\n\nShort-circuit the cached path so neither *result nor f_count is\ntouched when nlm_do_fopen() fails on a hashed nlm_file.","Type":"Description","Title":"lockd: Plug nlm_file refcount leak on cached nlm_do_fopen() fail"}]}}}