CVE-2026-42618

Heap Buffer Overflow in ntfs_decompress() Enables Privilege Escalation via SUID-root ntfs-3g

Published Oct 7, 2026 CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
Description
In NTFS-3G before 2026.7.7, a heap buffer overflow exists in ntfs_decompress() in compress.c that allows an attacker to corrupt one byte of heap memory in the SUID-root ntfs-3g binary by crafting a malicious NTFS image. The overflow is triggered by reading the special crafted file.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Debian DLA Debian DLA DLA-4883-1 ntfs-3g security update
Debian DSA Debian DSA DSA-6389-1 ntfs-3g security update
Ubuntu USN Ubuntu USN USN-8554-1 NTFS-3G vulnerabilities
History
Type Values Removed Values Added
CPEs cpe:2.3:a:tuxera:ntfs-3g:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Title Heap Buffer Overflow in ntfs_decompress() Enables Privilege Escalation via SUID-root ntfs-3g
First Time appeared Tuxera
Tuxera ntfs-3g
Vendors & Products Tuxera
Tuxera ntfs-3g
Type Values Removed Values Added
Weaknesses CWE-122
CWE-193
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description In NTFS-3G before 2026.7.7, a heap buffer overflow exists in ntfs_decompress() in compress.c that allows an attacker to corrupt one byte of heap memory in the SUID-root ntfs-3g binary by crafting a malicious NTFS image. The overflow is triggered by reading the special crafted file.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Oct 7, 2026, 2:31 PM
Reserved
Apr 29, 2026, 12:00 AM
Status
Analyzed
Published
Oct 7, 2026, 2:17 PM
Modified
Oct 8, 2026, 7:09 PM