CVE-2026-42618: Heap Overflow (CVSS 7.1)

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.

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CVSS v3.1 Score

7.1

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Weakness Type (CWE)

CWE-122 CWE-122

CWE-193 CWE-193

References

Other References

https://github.com/tuxera/ntfs-3g/releases#release-2026.7.7 https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-6whp-3f63-97qw

Frequently Asked Questions

What is CVE-2026-42618? +

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. It has a CVSS v3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-42618? +

CVE-2026-42618 has a CVSS v3.1 score of 7.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

How do I check if I'm vulnerable to CVE-2026-42618? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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