Vulnerability · Published Aug 24, 2026 · Assigned by mitre
CVE-2026-56135
High 7.4
In plain English
A high-severity heap buffer overflow in the ntfs-3g package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
In NTFS-3G through 2026.2.25, a heap-based buffer overflow exists in the function build_inherited_id() in libntfs-3g/security.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 by creating a file in a crafted directory.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | ntfs-3g | 1:2022.10.3-1+deb12u4 | DEBIAN-CVE-2026-56135 |
| Debian:13 | ntfs-3g | 1:2022.10.3-5+deb13u2 | DEBIAN-CVE-2026-56135 |
| Debian:14 | ntfs-3g | 1:2026.7.7-2 | DEBIAN-CVE-2026-56135 |
| Ubuntu:22.04:LTS | ntfs-3g | 1:2021.8.22-3ubuntu1.4 | UBUNTU-CVE-2026-56135 |
| Ubuntu:22.04:LTS | ntfs-3g | 1:2021.8.22-3ubuntu1.4 | USN-8554-1 |
| Ubuntu:24.04:LTS | ntfs-3g | 1:2022.10.3-1.2ubuntu3.2 | USN-8554-1 |
| Ubuntu:24.04:LTS | ntfs-3g | 1:2022.10.3-1.2ubuntu3.2 | UBUNTU-CVE-2026-56135 |
| Ubuntu:26.04:LTS | ntfs-3g | 1:2022.10.3-5ubuntu1.1 | USN-8554-1 |
| Ubuntu:26.04:LTS | ntfs-3g | 1:2022.10.3-5ubuntu1.1 | UBUNTU-CVE-2026-56135 |
Affected products (as reported)
Weakness: CWE-122 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H