Read the docs
TI-2026-69144 Aliases CVE-2026-42618

NTFS-3G heap overflow in ntfs_decompress() corrupts one heap byte

Priority LOW 30CWE-122Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
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

CVE-2026-42618 is a heap buffer overflow in ntfs_decompress() in compress.c in NTFS-3G before 2026.7.7. An attacker who crafts a malicious NTFS image can corrupt one byte of heap memory in the SUID-root ntfs-3g binary, and the overflow is triggered when the special crafted file is read. The weakness is classified as CWE-122 (Heap-based Buffer Overflow) and CWE-193 (Off-by-one Error), with a CVSS 3.1 base score of 7.1 (HIGH). CISA's SSVC rates exploitation as none, automatable as no, and technical impact as partial, and CISA has not added it to KEV.

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_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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00147 3rd 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

Update NTFS-3G to version 2026.7.7 or later, which fixes this issue. Red Hat's data lists one product as not affected.

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-2026-42618
  2. 2026-10-07 CVSS score added · CISA ADP
  3. 2026-10-07 Weakness changed · CISA ADP
  4. 2026-10-07 CISA SSVC decision points changed
  5. 2026-10-08 Affected versions changed · Red Hat
  6. 2026-10-08 CVSS score added · Red Hat

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