CVE-2026-42616: tuxera ntfs-3g Out-of-bounds Write
Vulnerability summary
CVE-2026-42616 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in tuxera ntfs-3g. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.8% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 6 · Related 5Timeline
- 07-10-2026PublishedVulnerability first disclosed.
- 19-10-2026Last modifiedVulnerability information updated.
Description
In NTFS-3G before 2026.7.7, a heap buffer overflow exists in cat() in ntfscat.c that allows an attacker to corrupt heap memory in the ntfscat binary by crafting a malicious NTFS image. The overflow is triggered by reading a file.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CVE.orgCNA7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.17%
Chance of exploitation in the next 30 days
Percentile
6%
Versus all other CVEs
30-day change
Change unavailable
Change unavailable
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Debian1 product
- ntfs-3gAll versions (No fix recorded) | < 1:2022.10.3-5+deb13u2 | < 1:2026.7.7-2
Tuxera1 product
- ntfs-3g< 2026.7.7
Ubuntu1 product
- ntfs-3gAll versions (No fix recorded) | < 1:2021.8.22-3ubuntu1.4 | < 1:2022.10.3-1.2ubuntu3.2 | < 1:2022.10.3-5ubuntu1.1
3 vendors · 3 products
References
7 links- github.com/tuxera/ntfs-3g/releasesRelease Notes
