Read the docs
TI-2026-69148 Aliases CVE-2026-46569

Heap buffer overflow in NTFS-3G lets local users corrupt memory

Priority LOW 33CWE-122Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

NTFS-3G before 2026.7.7 contains a heap buffer overflow in ntfs_ib_copy_tail() in libntfs-3g/index.c, a memory write past the end of a heap buffer (CWE-787). The overflow is triggered when a directory is extended, for example by creating a file. A local user without privileges can corrupt heap memory in the SUID-root ntfs-3g binary by crafting a malicious NTFS image.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

In NTFS-3G before 2026.7.7, a heap buffer overflow exists in ntfs_ib_copy_tail(), 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 extending a directory, e.g., by creating a file.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0016 5th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:tuxera:ntfs-3g:*:*:*:*:*:*:*:*before 2026.7.7VulnerableTuxera
  • cpe:2.3:a:tuxera:ntfs-3g:*:*:*:*:*:*:*:* Versions before 2026.7.7 Vulnerable ·Tuxera

Remediation

The sources list no fixed version for NTFS-3G.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-07 Threatist record created from CVE-2026-46569
  2. 2026-10-08 Affected versions changed · Red Hat
  3. 2026-10-08 CVSS score added · Red Hat
  4. 2026-10-09 CVSS score added · NVD
  5. 2026-10-09 Weakness changed · NVD
  6. 2026-10-09 Priority changed: LOW → MEDIUM
  7. 2026-10-09 Priority changed: MEDIUM → LOW
  8. 2026-10-09 CVSS score added · CISA ADP
  9. 2026-10-09 CISA SSVC decision points changed
  10. 2026-10-09 Weakness changed · CISA ADP

References

Patch 1

Other 1

  • TI-2017-00333 ntfs-3g: Modprobe influence vulnerability via environment variables CVSS 3.1HIGH 7.8
  • TI-2021-14150 In NTFS-3G versions < 2021.8.22, when a specially crafted NTFS inode is loaded in the… CVSS 3.1HIGH 7.8
  • TI-2026-69152 Heap buffer overflow in NTFS-3G lets attackers corrupt memory CVSS 3.1HIGH 8.1
  • TI-2022-19124 A buffer overflow was discovered in NTFS-3G before 2022.10.3. CVSS 3.1HIGH 7.8
  • TI-2022-12918 A crafted NTFS image can cause a heap-based buffer overflow in ntfs_check_log_client_array in NTFS-3G through 2021.8.22. CVSS 3.1HIGH 7.8
  • TI-2022-12917 A crafted NTFS image can cause a heap-based buffer overflow in ntfs_mft_rec_alloc in NTFS-3G through 2021.8.22. CVSS 3.1HIGH 7.8
See all 40 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences