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.
CVE-2026-42617
HIGHPre-NVD 7.17.1Trending — 4 sources updated this week
EchelonGraph scoreLOW confidence
This high-severity CVE scores 7.1 under CISA-ADP (Vulnrichment) CVSS v3.1 (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: cisa-adp
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 7.1Exploit: None knownExposed services: Not assessed
A fix is available — apply it.
- CVSS v3
- 7.1
- EG Score
- 7.1HIGHlow confidence
- EG Risk
- 32EG Risk 32/100CISA SSVC
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity71% × 45%Exploitation0% × 40%Automatability0% × 15%CISA SSVC: Track at every mission impact level.Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- Not listed
CISA SSVCTrack at every mission impact level.
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
October 7, 2026
Last Modified
October 7, 2026
Advisory Details (2)
Auto-updated Oct 7, 2026Patch available. Sources: github.
githubMentions a patch (unverified)
Heap buffer overflow in ntfs_ir_to_ib() in index.c · Advisory · tuxera/ntfs-3g · GitHub
https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-jv65-qqf7-f692generic
Releases · tuxera/ntfs-3g · GitHub
https://github.com/tuxera/ntfs-3g/releases#release-2026.7.7Patch Availability(1)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| ubuntu | ntfs-3g-dev (1:2022.10.3-5ubuntu1.1) @ resolute | 2026-10-07 | ubuntu |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
All Vendor Advisories
(1)
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
Data Freshness Timeline
(refreshed 7× in last 7d / 7× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-10-07 20:36 UTCEG score recompute▲ 7.10
- 2026-10-07 20:36 UTCVendor advisory
- 2026-10-07 20:36 UTCMITRE cvelistV5CVSS v3 → 7.1 · severity → HIGH
- 2026-10-07 14:49 UTCVendor advisory
- 2026-10-07 14:26 UTCNVD update
- 2026-10-07 14:08 UTCEG score recompute
- 2026-10-07 14:06 UTCMITRE cvelistV5first tracked
Related CVEs(same vendor + same CWE)
Same vendor
8 shownubuntu:USN-8554-1
Frequently asked(4)
What is CVE-2026-42617?
CVE-2026-42617 is a high vulnerability published on October 7, 2026. In NTFS-3G before 2026.7.7, a heap buffer overflow exists in ntfsirto_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.
When was CVE-2026-42617 disclosed?
CVE-2026-42617 was first published on October 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-42617?
CVE-2026-42617 has a CVSS v3.1 base score of 7.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-42617?
A fix for CVE-2026-42617 is available: update to the fixed version the vendor names in its advisory.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-42617
Is Your Infrastructure Affected by CVE-2026-42617?
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