Heap-based buffer overflow in NTFS-3G - CVE-2026-56135

Vulnerability identifier: #VU159430

CSH Severity: Low

CVSS v4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-56135

CWE-ID: CWE-122

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to corrupt heap memory in the SUID-root ntfs-3g binary.

The vulnerability exists due to a heap-based buffer overflow in build_inherited_id() in libntfs-3g/security.c when creating a file in a crafted NTFS directory. A remote attacker can craft a malicious NTFS image to corrupt heap memory when a file is created in the crafted directory.

NTFS-3G
Gentoo Linux
Debian Linux
Fedora
openEuler
Ubuntu
Anolis OS
ntfs-3g (Ubuntu package)
libntfs-3g89 (Ubuntu package)
libntfs-3g89t64 (Ubuntu package)
ntfs-3g
ntfs-3g-debuginfo
ntfs-3g-debugsource
ntfs-3g-devel
ntfs-3g-help
ntfs-3g-doc
ntfsprogs
ntfs-3g-libs
sys-fs/ntfs3g
ntfs-3g (Debian package)

Install security update from vendor's website.

NTFS-3G - update to 2026.7.7
ntfs-3g (Ubuntu package) - addressed in versions 1:2021.8.22-3ubuntu1.4, 1:2022.10.3-1.2ubuntu3.2, 1:2022.10.3-5ubuntu1.1
libntfs-3g89 (Ubuntu package) - update to 1:2021.8.22-3ubuntu1.4
libntfs-3g89t64 (Ubuntu package) - addressed in versions 1:2022.10.3-1.2ubuntu3.2, 1:2022.10.3-5ubuntu1.1
ntfs-3g - update to 2022.10.3-4
ntfs-3g-debuginfo - update to 2022.10.3-4
ntfs-3g-debugsource - update to 2022.10.3-4
ntfs-3g-devel - update to 2022.10.3-4
ntfs-3g-help - update to 2022.10.3-4
ntfs-3g - addressed in versions 2022.10.3-11.el9, 2022.10.3-12.el9, 2026.7.7-2.el10_4, 2026.9.18-1.el10_4
ntfs-3g-doc - update to 2026.2.25-3
ntfsprogs - update to 2026.2.25-3
ntfs-3g-libs - update to 2026.2.25-3
ntfs-3g-devel - update to 2026.2.25-3
ntfs-3g - update to 2026.2.25-3
sys-fs/ntfs3g - update to 2026.7.7
ntfs-3g (Debian package) - update to 1:2022.10.3-5+deb13u2

• https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-c9qg-fh4v-mq8r

• Multiple vulnerabilities in NTFS-3G
• Debian update for ntfs-3g
• Gentoo update for NTFS-3G
• Fedora EPEL 10.4 update for ntfs-3g
• Fedora EPEL 9 update for ntfs-3g
• Fedora EPEL 10.4 update for ntfs-3g
• Fedora EPEL 9 update for ntfs-3g
• openEuler update for ntfs-3g
• Ubuntu update for ntfs-3g
• Anolis OS update for ntfs-3g