{"api_version":"1","generated_at":"2026-09-18T01:06:21+00:00","cve":"CVE-2026-90199","urls":{"html":"https://cve.report/CVE-2026-90199","api":"https://cve.report/api/cve/CVE-2026-90199.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90199","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90199"},"summary":{"title":"fs/ntfs3: reject out-of-range evcn in mi_enum_attr()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: reject out-of-range evcn in mi_enum_attr()\n\nIn mi_enum_attr(), the start/end VCN validation for non-resident\nattributes is:\n\n\tif (svcn > evcn + 1) goto out;\n\nWhen evcn is U64_MAX the \"evcn + 1\" expression wraps to 0 and any svcn\npasses the check. For evcn values close to U64_MAX (but not equal to it)\nthe right-hand side is still a meaningless near-wrap upper bound, so a\nmalformed on-disk attribute with svcn == 0 and evcn near U64_MAX can pass\nmi_enum_attr() unrejected.\n\nVCN (virtual cluster number) is a cluster index, so any valid evcn is\nbounded by the volume's total cluster count, which ntfs3 holds in\nsbi->used.bitmap.nbits (set up in ntfs_init_from_boot() before any caller\nof mi_enum_attr() runs). Reject evcn values that fall outside this range.\n\nHowever, an empty non-resident attribute (no allocated clusters) is\nlegitimately encoded with svcn == 0 and evcn == -1 (U64_MAX), e.g. via\nattr->nres.evcn = cpu_to_le64((u64)vcn - 1) with vcn == 0. That sentinel\nmust keep passing, so exclude evcn == U64_MAX from the range check. The\nexisting \"svcn > evcn + 1\" test still tolerates the sentinel (\"0 > 0\" is\nfalse) and continues to require svcn == 0 for it, while the range check\nrejects every other out-of-range evcn and thereby also defuses the\n\"evcn + 1\" wraparound.\n\nsvcn does not need its own bound: once evcn < nbits, \"svcn > evcn + 1\"\nimplies svcn <= nbits.\n\n[almaz.alexandrovich@paragon-software.com: fixed evcn check]","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:14","updated_at":"2026-09-17 17:17:14"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/0441e34ce098c19185a7b52c5b8b89a8a5b26888","name":"https://git.kernel.org/stable/c/0441e34ce098c19185a7b52c5b8b89a8a5b26888","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ce9a619c432b9a4044fee115c5483fbed946c131","name":"https://git.kernel.org/stable/c/ce9a619c432b9a4044fee115c5483fbed946c131","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7ab69cef49ebdfee288287d62641b24ab1445ecc","name":"https://git.kernel.org/stable/c/7ab69cef49ebdfee288287d62641b24ab1445ecc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/20fd9f64c0050658f2031e6bd5d552c6f0c8f7e3","name":"https://git.kernel.org/stable/c/20fd9f64c0050658f2031e6bd5d552c6f0c8f7e3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2b9a0e57bfd365e2096706b19ae34dce3b4a884b","name":"https://git.kernel.org/stable/c/2b9a0e57bfd365e2096706b19ae34dce3b4a884b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90199","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90199","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 013ff63b649475f0ee134e2c8d0c8e65284ede50 0441e34ce098c19185a7b52c5b8b89a8a5b26888 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 013ff63b649475f0ee134e2c8d0c8e65284ede50 7ab69cef49ebdfee288287d62641b24ab1445ecc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 013ff63b649475f0ee134e2c8d0c8e65284ede50 ce9a619c432b9a4044fee115c5483fbed946c131 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 013ff63b649475f0ee134e2c8d0c8e65284ede50 2b9a0e57bfd365e2096706b19ae34dce3b4a884b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 013ff63b649475f0ee134e2c8d0c8e65284ede50 20fd9f64c0050658f2031e6bd5d552c6f0c8f7e3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a7accf181a4709a6e380360372150cc4a1b6b89a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3dfd727873c3e8da74a2e3907120ff052c5f0bcc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1d7dd485108d4f633b543c9c14071cc325b68ae5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.15.209 5.16 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.1.115 6.2 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.5.11 6.6 semver","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 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 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/ntfs3/record.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"0441e34ce098c19185a7b52c5b8b89a8a5b26888","status":"affected","version":"013ff63b649475f0ee134e2c8d0c8e65284ede50","versionType":"git"},{"lessThan":"7ab69cef49ebdfee288287d62641b24ab1445ecc","status":"affected","version":"013ff63b649475f0ee134e2c8d0c8e65284ede50","versionType":"git"},{"lessThan":"ce9a619c432b9a4044fee115c5483fbed946c131","status":"affected","version":"013ff63b649475f0ee134e2c8d0c8e65284ede50","versionType":"git"},{"lessThan":"2b9a0e57bfd365e2096706b19ae34dce3b4a884b","status":"affected","version":"013ff63b649475f0ee134e2c8d0c8e65284ede50","versionType":"git"},{"lessThan":"20fd9f64c0050658f2031e6bd5d552c6f0c8f7e3","status":"affected","version":"013ff63b649475f0ee134e2c8d0c8e65284ede50","versionType":"git"},{"status":"affected","version":"a7accf181a4709a6e380360372150cc4a1b6b89a","versionType":"git"},{"status":"affected","version":"3dfd727873c3e8da74a2e3907120ff052c5f0bcc","versionType":"git"},{"status":"affected","version":"1d7dd485108d4f633b543c9c14071cc325b68ae5","versionType":"git"},{"lessThan":"5.16","status":"affected","version":"5.15.209","versionType":"semver"},{"lessThan":"6.2","status":"affected","version":"6.1.115","versionType":"semver"},{"lessThan":"6.6","status":"affected","version":"6.5.11","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/ntfs3/record.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":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","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":"6.6.157","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.209","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.115","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5.11","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: reject out-of-range evcn in mi_enum_attr()\n\nIn mi_enum_attr(), the start/end VCN validation for non-resident\nattributes is:\n\n\tif (svcn > evcn + 1) goto out;\n\nWhen evcn is U64_MAX the \"evcn + 1\" expression wraps to 0 and any svcn\npasses the check. For evcn values close to U64_MAX (but not equal to it)\nthe right-hand side is still a meaningless near-wrap upper bound, so a\nmalformed on-disk attribute with svcn == 0 and evcn near U64_MAX can pass\nmi_enum_attr() unrejected.\n\nVCN (virtual cluster number) is a cluster index, so any valid evcn is\nbounded by the volume's total cluster count, which ntfs3 holds in\nsbi->used.bitmap.nbits (set up in ntfs_init_from_boot() before any caller\nof mi_enum_attr() runs). Reject evcn values that fall outside this range.\n\nHowever, an empty non-resident attribute (no allocated clusters) is\nlegitimately encoded with svcn == 0 and evcn == -1 (U64_MAX), e.g. via\nattr->nres.evcn = cpu_to_le64((u64)vcn - 1) with vcn == 0. That sentinel\nmust keep passing, so exclude evcn == U64_MAX from the range check. The\nexisting \"svcn > evcn + 1\" test still tolerates the sentinel (\"0 > 0\" is\nfalse) and continues to require svcn == 0 for it, while the range check\nrejects every other out-of-range evcn and thereby also defuses the\n\"evcn + 1\" wraparound.\n\nsvcn does not need its own bound: once evcn < nbits, \"svcn > evcn + 1\"\nimplies svcn <= nbits.\n\n[almaz.alexandrovich@paragon-software.com: fixed evcn check]"}],"providerMetadata":{"dateUpdated":"2026-09-17T16:07:17.550Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/0441e34ce098c19185a7b52c5b8b89a8a5b26888"},{"url":"https://git.kernel.org/stable/c/7ab69cef49ebdfee288287d62641b24ab1445ecc"},{"url":"https://git.kernel.org/stable/c/ce9a619c432b9a4044fee115c5483fbed946c131"},{"url":"https://git.kernel.org/stable/c/2b9a0e57bfd365e2096706b19ae34dce3b4a884b"},{"url":"https://git.kernel.org/stable/c/20fd9f64c0050658f2031e6bd5d552c6f0c8f7e3"}],"title":"fs/ntfs3: reject out-of-range evcn in mi_enum_attr()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90199","datePublished":"2026-09-17T16:07:17.550Z","dateReserved":"2026-09-11T19:38:34.792Z","dateUpdated":"2026-09-17T16:07:17.550Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:14","lastModifiedDate":"2026-09-17 17:17:14","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90199","Ordinal":"1","Title":"fs/ntfs3: reject out-of-range evcn in mi_enum_attr()","CVE":"CVE-2026-90199","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90199","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: reject out-of-range evcn in mi_enum_attr()\n\nIn mi_enum_attr(), the start/end VCN validation for non-resident\nattributes is:\n\n\tif (svcn > evcn + 1) goto out;\n\nWhen evcn is U64_MAX the \"evcn + 1\" expression wraps to 0 and any svcn\npasses the check. For evcn values close to U64_MAX (but not equal to it)\nthe right-hand side is still a meaningless near-wrap upper bound, so a\nmalformed on-disk attribute with svcn == 0 and evcn near U64_MAX can pass\nmi_enum_attr() unrejected.\n\nVCN (virtual cluster number) is a cluster index, so any valid evcn is\nbounded by the volume's total cluster count, which ntfs3 holds in\nsbi->used.bitmap.nbits (set up in ntfs_init_from_boot() before any caller\nof mi_enum_attr() runs). Reject evcn values that fall outside this range.\n\nHowever, an empty non-resident attribute (no allocated clusters) is\nlegitimately encoded with svcn == 0 and evcn == -1 (U64_MAX), e.g. via\nattr->nres.evcn = cpu_to_le64((u64)vcn - 1) with vcn == 0. That sentinel\nmust keep passing, so exclude evcn == U64_MAX from the range check. The\nexisting \"svcn > evcn + 1\" test still tolerates the sentinel (\"0 > 0\" is\nfalse) and continues to require svcn == 0 for it, while the range check\nrejects every other out-of-range evcn and thereby also defuses the\n\"evcn + 1\" wraparound.\n\nsvcn does not need its own bound: once evcn < nbits, \"svcn > evcn + 1\"\nimplies svcn <= nbits.\n\n[almaz.alexandrovich@paragon-software.com: fixed evcn check]","Type":"Description","Title":"fs/ntfs3: reject out-of-range evcn in mi_enum_attr()"}]}}}