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[USN-8554-1] NTFS-3G vulnerabilities

Posted on 16 July 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8554-1
July 16, 2026

ntfs-3g vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in NTFS-3G.

Software Description:
- ntfs-3g: read/write NTFS driver for FUSE

Details:

It was discovered that NTFS-3G had a heap buffer overflow when reading
certain NTFS images. A local attacker could possibly use this issue to
execute arbitrary code. (CVE-2026-42616)

It was discovered that NTFS-3G had multiple heap buffer overflows when
processing certain NTFS images. A local attacker could possibly use these
issues to execute arbitrary code. (CVE-2026-42617, CVE-2026-42618,
CVE-2026-46569, CVE-2026-46570, CVE-2026-46572, CVE-2026-56135)

It was discovered that NTFS-3G had out-of-bounds reads when processing
certain NTFS images. A local attacker could possibly use these issues to
obtain sensitive information. (CVE-2026-46571, CVE-2026-56136)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 26.04 LTS
libntfs-3g89t64 1:2022.10.3-5ubuntu1.1
ntfs-3g 1:2022.10.3-5ubuntu1.1

Ubuntu 24.04 LTS
libntfs-3g89t64 1:2022.10.3-1.2ubuntu3.2
ntfs-3g 1:2022.10.3-1.2ubuntu3.2

Ubuntu 22.04 LTS
libntfs-3g89 1:2021.8.22-3ubuntu1.4
ntfs-3g 1:2021.8.22-3ubuntu1.4

In general, a standard system update will make all the necessary
changes.

References:
https://ubuntu.com/security/notices/USN-8554-1
CVE-2026-42616, CVE-2026-42617, CVE-2026-42618, CVE-2026-46569,
CVE-2026-46570, CVE-2026-46571, CVE-2026-46572, CVE-2026-56135,
CVE-2026-56136

Package Information:
https://launchpad.net/ubuntu/+source/ntfs-3g/1:2022.10.3-5ubuntu1.1
https://launchpad.net/ubuntu/+source/ntfs-3g/1:2022.10.3-1.2ubuntu3.2
https://launchpad.net/ubuntu/+source/ntfs-3g/1:2021.8.22-3ubuntu1.4

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