{"id":"DEBIAN-CVE-2026-40706","details":"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.","modified":"2026-09-14T17:03:33.386570441Z","published":"2026-04-21T22:16:19.077Z","upstream":["CVE-2026-40706"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-40706"}],"affected":[{"package":{"name":"ntfs-3g","ecosystem":"Debian:12","purl":"pkg:deb/debian/ntfs-3g?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2022.10.3-1+deb12u3"}]}],"versions":["1:2022.10.3-1","1:2022.10.3-1+deb12u1","1:2022.10.3-1+deb12u2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40706.json"}},{"package":{"name":"ntfs-3g","ecosystem":"Debian:13","purl":"pkg:deb/debian/ntfs-3g?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2022.10.3-5+deb13u1"}]}],"versions":["1:2022.10.3-5"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40706.json"}},{"package":{"name":"ntfs-3g","ecosystem":"Debian:14","purl":"pkg:deb/debian/ntfs-3g?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2026.2.25-1"}]}],"versions":["1:2022.10.3-5"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40706.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}