CVE-2026-42617
Tuxera ntfs-3g: heap buffer overflow
- Risk score
- 43/100
- CVSS
- 7.1 v3.1
- Exploit chance (30 days)
- 0.1%
- Published
- 7 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- In NTFS-3G before 2026.7.7, a heap buffer overflow exists in ntfs_ir_to_ib() in index.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 extending a directory, e.g., by creating a file.
- Affected
- Tuxera ntfs-3g before 2026.7.7
- Fix
- Upgrade Tuxera ntfs-3g to 2026.7.7 or later.
- Exploitation
- No known exploitation
Story map
At a glance
Tuxera ntfs-3g: Yellow, plan it in. In NTFS-3G before 2026.7.7, a heap buffer overflow exists in ntfs_index_walk_down() in libntfs-3g/index.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 reading the special crafted file metadata.
The flaws
- CVE-2026-42617: Heap buffer overflow (CVSS 7.1 · EPSS 0%)
- CVE-2026-46570: Heap buffer overflow (CVSS 8.1 · EPSS 0%)
- CVE-2026-42616: Out-of-bounds write (CVSS 7.8 · EPSS 0%)
- CVE-2026-46569: Out-of-bounds write (CVSS 7.7 · EPSS 0%)
The fix
Upgrade Tuxera ntfs-3g: 2026.7.7 or later on your release line
Who is exposed: Tuxera ntfs-3g before 2026.7.7
Where it stands
- No known exploitation
Connects to
- Same weakness: Heap buffer overflow (CWE-122). 396 other warnings in 30 days
- Same product: Earlier Tuxera ntfs-3g warnings. 3 in the last 90 days
Why it is Yellow
- CVSS 7.1 high
References
Original description
In NTFS-3G before 2026.7.7, a heap buffer overflow exists in ntfs_ir_to_ib() in index.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 extending a directory, e.g., by creating a file.
Last activity 7 Oct 2026. Patch Forecast updates every hour.