{"api_version":"1","generated_at":"2026-09-25T07:55:08+00:00","cve":"CVE-2026-93811","urls":{"html":"https://cve.report/CVE-2026-93811","api":"https://cve.report/api/cve/CVE-2026-93811.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-93811","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-93811"},"summary":{"title":"ksmbd: Fix acl.sd_buf memory leak and invalid sd_size error handling","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: Fix acl.sd_buf memory leak and invalid sd_size error handling\n\n1. When ndr_decode_v4_ntacl() fails, the code jumped to free_n_data\n   which only freed n.data, skipping kfree(acl.sd_buf) and leaking\n   the buffer. Zero-initialize struct xattr_ntacl acl, reorder error\n   labels to out_free to release acl.sd_buf on all error paths.\n\n2. if (acl.sd_size < sizeof(struct smb_ntsd)) is true, original code\n   returned success without freeing sd_buf and left stale *pntsd.\n   Set rc = -EINVAL before jumping to out_free to return error code and\n   free buffer.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-24 17:17:14","updated_at":"2026-09-24 17:17:14"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/c3836f55e0dab96314774215e12d87f63fa919f2","name":"https://git.kernel.org/stable/c/c3836f55e0dab96314774215e12d87f63fa919f2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6e6329322ad733c5b23555c609353841560b26bc","name":"https://git.kernel.org/stable/c/6e6329322ad733c5b23555c609353841560b26bc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d708a36634bb7b6f94d0e76d587d2ec50b2b93b5","name":"https://git.kernel.org/stable/c/d708a36634bb7b6f94d0e76d587d2ec50b2b93b5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93811","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93811","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 c3836f55e0dab96314774215e12d87f63fa919f2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 6e6329322ad733c5b23555c609353841560b26bc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 d708a36634bb7b6f94d0e76d587d2ec50b2b93b5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.12.111 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18.53 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.111 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.53 6.18.* 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":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/smb/server/vfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c3836f55e0dab96314774215e12d87f63fa919f2","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"6e6329322ad733c5b23555c609353841560b26bc","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"d708a36634bb7b6f94d0e76d587d2ec50b2b93b5","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"6.12.111","status":"affected","version":"0","versionType":"semver"},{"lessThan":"6.18.53","status":"affected","version":"0","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/smb/server/vfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.111","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.53","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":"6.12.111","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.53","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: Fix acl.sd_buf memory leak and invalid sd_size error handling\n\n1. When ndr_decode_v4_ntacl() fails, the code jumped to free_n_data\n   which only freed n.data, skipping kfree(acl.sd_buf) and leaking\n   the buffer. Zero-initialize struct xattr_ntacl acl, reorder error\n   labels to out_free to release acl.sd_buf on all error paths.\n\n2. if (acl.sd_size < sizeof(struct smb_ntsd)) is true, original code\n   returned success without freeing sd_buf and left stale *pntsd.\n   Set rc = -EINVAL before jumping to out_free to return error code and\n   free buffer."}],"providerMetadata":{"dateUpdated":"2026-09-24T16:02:47.745Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/c3836f55e0dab96314774215e12d87f63fa919f2"},{"url":"https://git.kernel.org/stable/c/6e6329322ad733c5b23555c609353841560b26bc"},{"url":"https://git.kernel.org/stable/c/d708a36634bb7b6f94d0e76d587d2ec50b2b93b5"}],"title":"ksmbd: Fix acl.sd_buf memory leak and invalid sd_size error handling","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-93811","datePublished":"2026-09-24T16:02:47.745Z","dateReserved":"2026-09-18T17:59:28.790Z","dateUpdated":"2026-09-24T16:02:47.745Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-24 17:17:14","lastModifiedDate":"2026-09-24 17:17:14","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"93811","Ordinal":"1","Title":"ksmbd: Fix acl.sd_buf memory leak and invalid sd_size error hand","CVE":"CVE-2026-93811","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"93811","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: Fix acl.sd_buf memory leak and invalid sd_size error handling\n\n1. When ndr_decode_v4_ntacl() fails, the code jumped to free_n_data\n   which only freed n.data, skipping kfree(acl.sd_buf) and leaking\n   the buffer. Zero-initialize struct xattr_ntacl acl, reorder error\n   labels to out_free to release acl.sd_buf on all error paths.\n\n2. if (acl.sd_size < sizeof(struct smb_ntsd)) is true, original code\n   returned success without freeing sd_buf and left stale *pntsd.\n   Set rc = -EINVAL before jumping to out_free to return error code and\n   free buffer.","Type":"Description","Title":"ksmbd: Fix acl.sd_buf memory leak and invalid sd_size error hand"}]}}}