{"api_version":"1","generated_at":"2026-04-22T12:55:43+00:00","cve":"CVE-2026-31433","urls":{"html":"https://cve.report/CVE-2026-31433","api":"https://cve.report/api/cve/CVE-2026-31433.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31433","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31433"},"summary":{"title":"ksmbd: fix potencial OOB in get_file_all_info() for compound requests","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-04-22 09:16:21","updated_at":"2026-04-22 09:16:21"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/358cdaa1f7fbf2712cb4c5f6b59cb9a5c673c5fe","name":"https://git.kernel.org/stable/c/358cdaa1f7fbf2712cb4c5f6b59cb9a5c673c5fe","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4cca3eff2099b18672934a39cee70aed835d652c","name":"https://git.kernel.org/stable/c/4cca3eff2099b18672934a39cee70aed835d652c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7aec5a769d2356cbf344d85bcfd36de592ac96a5","name":"https://git.kernel.org/stable/c/7aec5a769d2356cbf344d85bcfd36de592ac96a5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b0cd9725fe2bcc9f37d096b132318a9060373f5d","name":"https://git.kernel.org/stable/c/b0cd9725fe2bcc9f37d096b132318a9060373f5d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3a852f9d1c981fb14f6bf4e24999e0ea8088a7d7","name":"https://git.kernel.org/stable/c/3a852f9d1c981fb14f6bf4e24999e0ea8088a7d7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9d7032851d6f5adbe2739601ca456c0ad3b422f0","name":"https://git.kernel.org/stable/c/9d7032851d6f5adbe2739601ca456c0ad3b422f0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/beef2634f81f1c086208191f7228bce1d366493d","name":"https://git.kernel.org/stable/c/beef2634f81f1c086208191f7228bce1d366493d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31433","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31433","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f2283680a80571ca82d710bc6ecd8f8beac67d63 3a852f9d1c981fb14f6bf4e24999e0ea8088a7d7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9f297df20d93411c0b4ddad7f88ba04a7cd36e77 4cca3eff2099b18672934a39cee70aed835d652c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d 358cdaa1f7fbf2712cb4c5f6b59cb9a5c673c5fe git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d 7aec5a769d2356cbf344d85bcfd36de592ac96a5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d b0cd9725fe2bcc9f37d096b132318a9060373f5d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d 9d7032851d6f5adbe2739601ca456c0ad3b422f0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d beef2634f81f1c086208191f7228bce1d366493d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.6","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.203 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.168 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.131 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.80 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.21 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.11 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * 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/smb2pdu.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"3a852f9d1c981fb14f6bf4e24999e0ea8088a7d7","status":"affected","version":"f2283680a80571ca82d710bc6ecd8f8beac67d63","versionType":"git"},{"lessThan":"4cca3eff2099b18672934a39cee70aed835d652c","status":"affected","version":"9f297df20d93411c0b4ddad7f88ba04a7cd36e77","versionType":"git"},{"lessThan":"358cdaa1f7fbf2712cb4c5f6b59cb9a5c673c5fe","status":"affected","version":"e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d","versionType":"git"},{"lessThan":"7aec5a769d2356cbf344d85bcfd36de592ac96a5","status":"affected","version":"e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d","versionType":"git"},{"lessThan":"b0cd9725fe2bcc9f37d096b132318a9060373f5d","status":"affected","version":"e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d","versionType":"git"},{"lessThan":"9d7032851d6f5adbe2739601ca456c0ad3b422f0","status":"affected","version":"e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d","versionType":"git"},{"lessThan":"beef2634f81f1c086208191f7228bce1d366493d","status":"affected","version":"e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/smb/server/smb2pdu.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.6"},{"lessThan":"6.6","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.168","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.131","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.80","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.21","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.203","versionStartIncluding":"5.15.145","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.168","versionStartIncluding":"6.1.71","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.131","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.80","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.21","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.11","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"6.6","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-04-22T08:15:11.719Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-31433","datePublished":"2026-04-22T08:15:11.719Z","dateReserved":"2026-03-09T15:48:24.089Z","dateUpdated":"2026-04-22T08:15:11.719Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-22 09:16:21","lastModifiedDate":"2026-04-22 09:16:21","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31433","Ordinal":"1","Title":"ksmbd: fix potencial OOB in get_file_all_info() for compound req","CVE":"CVE-2026-31433","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31433","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"ksmbd: fix potencial OOB in get_file_all_info() for compound req"}]}}}