Vulnerability · Published Aug 24, 2026 · Assigned by mitre
CVE-2026-56136
Medium 4.7
In plain English
A medium-severity out-of-bounds read 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 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.7Medium
Exploit odds (30 days)0.1%top 98.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
In NTFS-3G through 2026.2.25, an out-of-bounds read exists in ntfs_ir_nill() in libntfs-3g/index.c that allows an attacker to read possibly confidential information in an ntfs-3g process by crafting a malicious NTFS image. This read operation is triggered by creation of a file with a crafted name.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | ntfs-3g | 1:2022.10.3-1+deb12u4 | DEBIAN-CVE-2026-56136 |
| Debian:13 | ntfs-3g | 1:2022.10.3-5+deb13u2 | DEBIAN-CVE-2026-56136 |
| Debian:14 | ntfs-3g | 1:2026.7.7-2 | DEBIAN-CVE-2026-56136 |
| Ubuntu:22.04:LTS | ntfs-3g | 1:2021.8.22-3ubuntu1.4 | UBUNTU-CVE-2026-56136 |
| 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-2026-56136 |
| 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-2026-56136 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N