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DEBIAN-CVE-2026-40706

Type: advisorySource: OSV1 source record

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.

Announced Group revision 1
Original source ↗

DEBIAN-CVE-2026-40706

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-40706

ntfs-3g

Source reference: /affected/0/package/name

Affected versions
1:2022.10.3-1

Source reference: /affected/0/versions

1:2022.10.3-1+deb12u1

Source reference: /affected/0/versions

1:2022.10.3-1+deb12u2

Source reference: /affected/0/versions

Fixed versions
1:2022.10.3-1+deb12u3

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

ntfs-3g

Source reference: /affected/1/package/name

Affected versions
1:2022.10.3-5

Source reference: /affected/1/versions

Fixed versions
1:2022.10.3-5+deb13u1

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

ntfs-3g

Source reference: /affected/2/package/name

Affected versions
1:2022.10.3-5

Source reference: /affected/2/versions

Fixed versions
1:2026.2.25-1

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1:2022.10.3-1+deb12u3"
          }
        ]
      }
    ],
    "package": {
      "name": "ntfs-3g",
      "purl": "pkg:deb/debian/ntfs-3g?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "1:2022.10.3-1",
      "1:2022.10.3-1+deb12u1",
      "1:2022.10.3-1+deb12u2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40706.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1:2022.10.3-5+deb13u1"
          }
        ]
      }
    ],
    "package": {
      "name": "ntfs-3g",
      "purl": "pkg:deb/debian/ntfs-3g?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "1:2022.10.3-5"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40706.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1:2026.2.25-1"
          }
        ]
      }
    ],
    "package": {
      "name": "ntfs-3g",
      "purl": "pkg:deb/debian/ntfs-3g?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "1:2022.10.3-5"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40706.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#56960 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. DEBIAN-CVE-2026-40706 · Revision 1Source updated