{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-93811","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-18T17:59:28.790Z","datePublished":"2026-09-24T16:02:47.745Z","dateUpdated":"2026-10-03T10:57:43.607Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-10-03T10:57:43.607Z"},"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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/server/vfs.c"],"versions":[{"version":"cb69d4d6f709f87c94afa28ae64c501576692171","lessThan":"f46a70a082bdbfecbe074af8a719c26c4deb58c6","status":"affected","versionType":"git"},{"version":"8f0541186e9ad1b62accc9519cc2b7a7240272a7","lessThan":"86c2625fb9863139b359805fc6be1e31edbd3d65","status":"affected","versionType":"git"},{"version":"8f0541186e9ad1b62accc9519cc2b7a7240272a7","lessThan":"edc17db83085624a2b1bacf6a4521d7f15571737","status":"affected","versionType":"git"},{"version":"8f0541186e9ad1b62accc9519cc2b7a7240272a7","lessThan":"c3836f55e0dab96314774215e12d87f63fa919f2","status":"affected","versionType":"git"},{"version":"8f0541186e9ad1b62accc9519cc2b7a7240272a7","lessThan":"6e6329322ad733c5b23555c609353841560b26bc","status":"affected","versionType":"git"},{"version":"8f0541186e9ad1b62accc9519cc2b7a7240272a7","lessThan":"d708a36634bb7b6f94d0e76d587d2ec50b2b93b5","status":"affected","versionType":"git"},{"version":"6e8f4abf584253cbaa596ea4ad13110cf61cd4c9","status":"affected","versionType":"git"},{"version":"8e33102309bd6839b2e2e158f93a7b378cb4655d","status":"affected","versionType":"git"},{"version":"5.15.62","lessThan":"5.15.222","status":"affected","versionType":"semver"},{"version":"5.18.18","lessThan":"5.19","status":"affected","versionType":"semver"},{"version":"5.19.2","lessThan":"5.20","status":"affected","versionType":"semver"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/server/vfs.c"],"versions":[{"version":"6.0","status":"affected"},{"version":"0","lessThan":"6.0","status":"unaffected","versionType":"semver"},{"version":"5.15.222","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.189","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.111","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.53","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2","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":"5.15.62","versionEndExcluding":"5.15.222"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.12.111"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.18.53"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"7.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18.18"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/f46a70a082bdbfecbe074af8a719c26c4deb58c6"},{"url":"https://git.kernel.org/stable/c/86c2625fb9863139b359805fc6be1e31edbd3d65"},{"url":"https://git.kernel.org/stable/c/edc17db83085624a2b1bacf6a4521d7f15571737"},{"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"}}}}