{"api_version":"1","generated_at":"2026-09-11T22:59:42+00:00","cve":"CVE-2026-89672","urls":{"html":"https://cve.report/CVE-2026-89672","api":"https://cve.report/api/cve/CVE-2026-89672.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-89672","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-89672"},"summary":{"title":"nfsd: gate nfs2 setacl by argp->mask","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: gate nfs2 setacl by argp->mask\n\nThe NFSACL v2 SETACL path shares the decoder convention used by its\nv3 sibling: nfsaclsvc_decode_setaclargs() fills in argp->acl_access\nonly when NFS_ACL is set in the request mask and argp->acl_default\nonly when NFS_DFACL is set, leaving the other pointer NULL because\nthe argument buffer is zeroed up to pc_argzero before decode.\n\nnfsacld_proc_setacl() then hands both pointers to set_posix_acl()\nunconditionally. set_posix_acl(idmap, dentry, type, NULL) is the VFS\n\"remove this ACL type\" operation, so an omitted arm is\nindistinguishable from an explicit request to delete that ACL. A\nSETACL carrying only NFS_ACL silently strips the directory's default\nACL; mask=0 strips both.\n\nThis is the same defect just fixed in nfsd3_proc_setacl(); apply the\nsame remedy. Gate each set_posix_acl() call on its mask bit and\ninitialize error to 0 so that a request with neither bit set leaves\nthe on-disk ACLs untouched and returns success. The out_drop_lock\npath and the unconditional posix_acl_release() in\nnfsaclsvc_release_setacl() already tolerate the skipped arms.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-11 20:19:53","updated_at":"2026-09-11 20:19:53"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/e41d173d9dc735cecb15ab7aa63ecab09338f81b","name":"https://git.kernel.org/stable/c/e41d173d9dc735cecb15ab7aa63ecab09338f81b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f951b22dbeec46f2e0fba81cb80d1b0c686b61eb","name":"https://git.kernel.org/stable/c/f951b22dbeec46f2e0fba81cb80d1b0c686b61eb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a3a7e20ed66d3f04d37883c398da8a113b430769","name":"https://git.kernel.org/stable/c/a3a7e20ed66d3f04d37883c398da8a113b430769","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/37eea38e7898538f0ec5f1eb8b18d8646e4be41c","name":"https://git.kernel.org/stable/c/37eea38e7898538f0ec5f1eb8b18d8646e4be41c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89672","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89672","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a257cdd0e2179630d3201c32ba14d7fcb3c3a055 e41d173d9dc735cecb15ab7aa63ecab09338f81b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a257cdd0e2179630d3201c32ba14d7fcb3c3a055 f951b22dbeec46f2e0fba81cb80d1b0c686b61eb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a257cdd0e2179630d3201c32ba14d7fcb3c3a055 37eea38e7898538f0ec5f1eb8b18d8646e4be41c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a257cdd0e2179630d3201c32ba14d7fcb3c3a055 a3a7e20ed66d3f04d37883c398da8a113b430769 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.13","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.13 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.109 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.50 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.4 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/nfsd/nfs2acl.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"e41d173d9dc735cecb15ab7aa63ecab09338f81b","status":"affected","version":"a257cdd0e2179630d3201c32ba14d7fcb3c3a055","versionType":"git"},{"lessThan":"f951b22dbeec46f2e0fba81cb80d1b0c686b61eb","status":"affected","version":"a257cdd0e2179630d3201c32ba14d7fcb3c3a055","versionType":"git"},{"lessThan":"37eea38e7898538f0ec5f1eb8b18d8646e4be41c","status":"affected","version":"a257cdd0e2179630d3201c32ba14d7fcb3c3a055","versionType":"git"},{"lessThan":"a3a7e20ed66d3f04d37883c398da8a113b430769","status":"affected","version":"a257cdd0e2179630d3201c32ba14d7fcb3c3a055","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/nfsd/nfs2acl.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.13"},{"lessThan":"2.6.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.109","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.50","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.109","versionStartIncluding":"2.6.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.50","versionStartIncluding":"2.6.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.4","versionStartIncluding":"2.6.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"2.6.13","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: gate nfs2 setacl by argp->mask\n\nThe NFSACL v2 SETACL path shares the decoder convention used by its\nv3 sibling: nfsaclsvc_decode_setaclargs() fills in argp->acl_access\nonly when NFS_ACL is set in the request mask and argp->acl_default\nonly when NFS_DFACL is set, leaving the other pointer NULL because\nthe argument buffer is zeroed up to pc_argzero before decode.\n\nnfsacld_proc_setacl() then hands both pointers to set_posix_acl()\nunconditionally. set_posix_acl(idmap, dentry, type, NULL) is the VFS\n\"remove this ACL type\" operation, so an omitted arm is\nindistinguishable from an explicit request to delete that ACL. A\nSETACL carrying only NFS_ACL silently strips the directory's default\nACL; mask=0 strips both.\n\nThis is the same defect just fixed in nfsd3_proc_setacl(); apply the\nsame remedy. Gate each set_posix_acl() call on its mask bit and\ninitialize error to 0 so that a request with neither bit set leaves\nthe on-disk ACLs untouched and returns success. The out_drop_lock\npath and the unconditional posix_acl_release() in\nnfsaclsvc_release_setacl() already tolerate the skipped arms."}],"providerMetadata":{"dateUpdated":"2026-09-11T19:45:57.414Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/e41d173d9dc735cecb15ab7aa63ecab09338f81b"},{"url":"https://git.kernel.org/stable/c/f951b22dbeec46f2e0fba81cb80d1b0c686b61eb"},{"url":"https://git.kernel.org/stable/c/37eea38e7898538f0ec5f1eb8b18d8646e4be41c"},{"url":"https://git.kernel.org/stable/c/a3a7e20ed66d3f04d37883c398da8a113b430769"}],"title":"nfsd: gate nfs2 setacl by argp->mask","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-89672","datePublished":"2026-09-11T19:45:57.414Z","dateReserved":"2026-09-11T19:38:34.746Z","dateUpdated":"2026-09-11T19:45:57.414Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-11 20:19:53","lastModifiedDate":"2026-09-11 20:19:53","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"89672","Ordinal":"1","Title":"nfsd: gate nfs2 setacl by argp->mask","CVE":"CVE-2026-89672","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"89672","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: gate nfs2 setacl by argp->mask\n\nThe NFSACL v2 SETACL path shares the decoder convention used by its\nv3 sibling: nfsaclsvc_decode_setaclargs() fills in argp->acl_access\nonly when NFS_ACL is set in the request mask and argp->acl_default\nonly when NFS_DFACL is set, leaving the other pointer NULL because\nthe argument buffer is zeroed up to pc_argzero before decode.\n\nnfsacld_proc_setacl() then hands both pointers to set_posix_acl()\nunconditionally. set_posix_acl(idmap, dentry, type, NULL) is the VFS\n\"remove this ACL type\" operation, so an omitted arm is\nindistinguishable from an explicit request to delete that ACL. A\nSETACL carrying only NFS_ACL silently strips the directory's default\nACL; mask=0 strips both.\n\nThis is the same defect just fixed in nfsd3_proc_setacl(); apply the\nsame remedy. Gate each set_posix_acl() call on its mask bit and\ninitialize error to 0 so that a request with neither bit set leaves\nthe on-disk ACLs untouched and returns success. The out_drop_lock\npath and the unconditional posix_acl_release() in\nnfsaclsvc_release_setacl() already tolerate the skipped arms.","Type":"Description","Title":"nfsd: gate nfs2 setacl by argp->mask"}]}}}