{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31433", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.089Z", "datePublished": "2026-04-22T08:15:11.719Z", "dateUpdated": "2026-04-22T08:15:11.719Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-04-22T08:15:11.719Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix potencial OOB in get_file_all_info() for compound requests\n\nWhen a compound request consists of QUERY_DIRECTORY + QUERY_INFO\n(FILE_ALL_INFORMATION) and the first command consumes nearly the entire\nmax_trans_size, get_file_all_info() would blindly call smbConvertToUTF16()\nwith PATH_MAX, causing out-of-bounds write beyond the response buffer.\nIn get_file_all_info(), there was a missing validation check for\nthe client-provided OutputBufferLength before copying the filename into\nFileName field of the smb2_file_all_info structure.\nIf the filename length exceeds the available buffer space, it could lead to\npotential buffer overflows or memory corruption during smbConvertToUTF16\nconversion. This calculating the actual free buffer size using\nsmb2_calc_max_out_buf_len() and returning -EINVAL if the buffer is\ninsufficient and updating smbConvertToUTF16 to use the actual filename\nlength (clamped by PATH_MAX) to ensure a safe copy operation."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/server/smb2pdu.c"], "versions": [{"version": "f2283680a80571ca82d710bc6ecd8f8beac67d63", "lessThan": "3a852f9d1c981fb14f6bf4e24999e0ea8088a7d7", "status": "affected", "versionType": "git"}, {"version": "9f297df20d93411c0b4ddad7f88ba04a7cd36e77", "lessThan": "4cca3eff2099b18672934a39cee70aed835d652c", "status": "affected", "versionType": "git"}, {"version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d", "lessThan": "358cdaa1f7fbf2712cb4c5f6b59cb9a5c673c5fe", "status": "affected", "versionType": "git"}, {"version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d", "lessThan": "7aec5a769d2356cbf344d85bcfd36de592ac96a5", "status": "affected", "versionType": "git"}, {"version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d", "lessThan": "b0cd9725fe2bcc9f37d096b132318a9060373f5d", "status": "affected", "versionType": "git"}, {"version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d", "lessThan": "9d7032851d6f5adbe2739601ca456c0ad3b422f0", "status": "affected", "versionType": "git"}, {"version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d", "lessThan": "beef2634f81f1c086208191f7228bce1d366493d", "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/smb/server/smb2pdu.c"], "versions": [{"version": "6.6", "status": "affected"}, {"version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.168", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.131", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.80", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.21", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.11", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "5.15.145", "versionEndExcluding": "5.15.203"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.71", "versionEndExcluding": "6.1.168"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.6.131"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.12.80"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.18.21"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.19.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/3a852f9d1c981fb14f6bf4e24999e0ea8088a7d7"}, {"url": "https://git.kernel.org/stable/c/4cca3eff2099b18672934a39cee70aed835d652c"}, {"url": "https://git.kernel.org/stable/c/358cdaa1f7fbf2712cb4c5f6b59cb9a5c673c5fe"}, {"url": "https://git.kernel.org/stable/c/7aec5a769d2356cbf344d85bcfd36de592ac96a5"}, {"url": "https://git.kernel.org/stable/c/b0cd9725fe2bcc9f37d096b132318a9060373f5d"}, {"url": "https://git.kernel.org/stable/c/9d7032851d6f5adbe2739601ca456c0ad3b422f0"}, {"url": "https://git.kernel.org/stable/c/beef2634f81f1c086208191f7228bce1d366493d"}], "title": "ksmbd: fix potencial OOB in get_file_all_info() for compound requests", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix potencial OOB in get_file_all_info() for compound requests\n\nWhen a compound request consists of QUERY_DIRECTORY + QUERY_INFO\n(FILE_ALL_INFORMATION) and the first command consumes nearly the entire\nmax_trans_size, get_file_all_info() would blindly call smbConvertToUTF16()\nwith PATH_MAX, causing out-of-bounds write beyond the response buffer.\nIn get_file_all_info(), there was a missing validation check for\nthe client-provided OutputBufferLength before copying the filename into\nFileName field of the smb2_file_all_info structure.\nIf the filename length exceeds the available buffer space, it could lead to\npotential buffer overflows or memory corruption during smbConvertToUTF16\nconversion. This calculating the actual free buffer size using\nsmb2_calc_max_out_buf_len() and returning -EINVAL if the buffer is\ninsufficient and updating smbConvertToUTF16 to use the actual filename\nlength (clamped by PATH_MAX) to ensure a safe copy operation."}], "id": "CVE-2026-31433", "lastModified": "2026-04-22T09:16:21.573", "metrics": {}, "published": "2026-04-22T09:16:21.573", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/358cdaa1f7fbf2712cb4c5f6b59cb9a5c673c5fe"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3a852f9d1c981fb14f6bf4e24999e0ea8088a7d7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4cca3eff2099b18672934a39cee70aed835d652c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7aec5a769d2356cbf344d85bcfd36de592ac96a5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9d7032851d6f5adbe2739601ca456c0ad3b422f0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b0cd9725fe2bcc9f37d096b132318a9060373f5d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/beef2634f81f1c086208191f7228bce1d366493d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}