CVE-2026-56135: In NTFS-3G through 2026.2.25, a heap-based buffer overflow exists in the function build_inherited_id() in libn

Q: How do I fix CVE-2026-56135?

ntfs-3g: upgrade to 2026.7.7. Exact commands for each OS are on this page.

Q: Is CVE-2026-56135 being exploited?

CVE-2026-56135 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-56135 affect?

CVE-2026-56135 affects ntfs-3g. Severity is high (CVSS 7.4). 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 imag

Routine

HIGH 7.4UPGRADE

CVE-2026-56135 is a high-severity flaw (CVSS 7.4) affecting ntfs-3g. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.4 (High)
Attack vector	Local
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.1% (top 97%)
CISA exploited list	No
Weakness	CWE-122
Published	2026-08-24
Last modified	2026-10-14

Publisher (CNA): MITRE · Vendor: tuxera

Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-24 21:17 UTCPublished CVE record published
2026-10-14 15:56 UTCUpdated Record last modified

tuxera ntfs-3g UPGRADE

Affected: < 2026.7.7

Fixed in: 2026.7.7

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ntfs-3g || rpm -q ntfs-3g || ntfs-3g --version

2. UPGRADE to 2026.7.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ntfs-3g

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ntfs-3g

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-56135?

ntfs-3g: upgrade to 2026.7.7. Exact commands for each OS are on this page.

Is CVE-2026-56135 being exploited?

CVE-2026-56135 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-56135 affect?

CVE-2026-56135 affects ntfs-3g. Severity is high (CVSS 7.4). 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 imag

How urgent is CVE-2026-56135?

Priority 27/100. High severity

Related CVEs

CVE-2026-56136 MEDIUM 4.7 UPGRADE In NTFS-3G through 2026.2.25, an out-of-bounds read exists in ntfs_ir_nill() in libntfs-3g/index.c that allows

References

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