{"id":"CVE-2026-40706","state":"PUBLISHED","title":"In NTFS-3G 2022.10.3 before 2026.2.25, a heap buffer overflow exists in ntfs_build_permissions_posix() in acls.c that allows an attacker to corrupt heap memory in the SUID-root ntf","description":"In NTFS-3G 2022.10.3 before 2026.2.25, a heap buffer overflow exists in ntfs_build_permissions_posix() in acls.c that allows an attacker to corrupt heap memory in the SUID-root ntfs-3g binary by crafting a malicious NTFS image. The overflow is triggered on the READ path (stat, readdir, open) when processing a security descriptor with multiple ACCESS_DENIED ACEs containing WRITE_OWNER from distinct group SIDs.","publishedAt":"2026-04-21T00:00:00.000Z","updatedAt":"2026-04-22T15:35:30.245Z","severity":{"score":8.4,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"mitre"},"assigner":"mitre","products":["Tuxera NTFS-3G"],"affected":[{"vendor":"Tuxera","product":"NTFS-3G","defaultStatus":"unknown","versions":[{"version":"2022.10.3","status":"affected","lessThan":"2026.2.25","versionType":"custom"}]}],"references":["https://github.com/tuxera/ntfs-3g/blob/d3ace19838ce37cfde55294e76841e6d2f393f9e/libntfs-3g/acls.c#L4011-L4027","https://www.openwall.com/lists/oss-security/2026/04/21/4","https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-4cwv-5285-63v9","https://github.com/tuxera/ntfs-3g/releases/tag/2026.2.25","https://lists.debian.org/debian-lts-announce/2026/04/msg00024.html","http://www.openwall.com/lists/oss-security/2026/04/21/4"],"weaknesses":["CWE-122"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/40xxx/CVE-2026-40706.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-40706","state":"PUBLISHED","datePublished":"2026-04-21T00:00:00.000Z","dateUpdated":"2026-04-22T15:35:30.245Z","assignerShortName":"mitre","assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateReserved":"2026-04-15T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"In NTFS-3G 2022.10.3 before 2026.2.25, a heap buffer overflow exists in ntfs_build_permissions_posix() in acls.c that allows an attacker to corrupt heap memory in the SUID-root ntfs-3g binary by crafting a malicious NTFS image. The overflow is triggered on the READ path (stat, readdir, open) when processing a security descriptor with multiple ACCESS_DENIED ACEs containing WRITE_OWNER from distinct group SIDs."}],"affected":[{"vendor":"Tuxera","product":"NTFS-3G","defaultStatus":"unknown","versions":[{"version":"2022.10.3","status":"affected","lessThan":"2026.2.25","versionType":"custom"}]}],"references":[{"url":"https://github.com/tuxera/ntfs-3g/blob/d3ace19838ce37cfde55294e76841e6d2f393f9e/libntfs-3g/acls.c#L4011-L4027"},{"url":"https://www.openwall.com/lists/oss-security/2026/04/21/4"},{"url":"https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-4cwv-5285-63v9"},{"url":"https://github.com/tuxera/ntfs-3g/releases/tag/2026.2.25"}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":8.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-122","description":"CWE-122 Heap-based Buffer Overflow","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"mitre","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateUpdated":"2026-04-21T21:04:43.906Z"},"x_generator":{"engine":"enrichogram 0.0.1"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:tuxera:ntfs-3g:*:*:*:*:*:*:*:*","versionStartIncluding":"2022.10.3","versionEndExcluding":"2026.2.25"}]}]}]},"adp":[{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2026/04/msg00024.html"},{"url":"http://www.openwall.com/lists/oss-security/2026/04/21/4"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-04-21T21:20:00.477Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-22T13:03:14.635555Z","id":"CVE-2026-40706","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-22T15:35:30.245Z"}}]}}}