CVE-2026-56135

HIGHPre-NVD 7.47.4—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.4 under CISA-ADP (Vulnrichment) CVSS v3.1 (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 96% of all CVEs by exploit prediction. 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, epss
Trending — 5 sources updated this week
7.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.4Exploit: None knownExposed: 0

A fix is available — apply it.

In NTFS-3G through 2026.2.25, a heap-based buffer overflow exists in the function build_inherited_id() in libntfs-3g/security.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 creating a file in a crafted directory.

CVSS v3
7.4
EG Score
7.4(medium)
EG Risk
33(Track)
EG Risk 33/100SSVC: Track

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 computed
Severity74% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
1%
KEV
Not listed

Published

August 24, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Aug 28, 2026
Patch available. Sources: github.
github Patch Available

Heap buffer overflow in build_inherited_id() · Advisory · tuxera/ntfs-3g · GitHub

https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-c9qg-fh4v-mq8r

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuntfs-3g-dev (1:2022.10.3-1.2ubuntu3.2) @ noble2026-08-29ubuntu

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 18× in last 7d / 18× 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.

  1. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 19:36 UTCVendor advisory
  3. 2026-08-29 08:11 UTCEG score recompute
  4. 2026-08-29 08:11 UTCVendor advisory
  5. 2026-08-28 21:41 UTCEPSS rescore
  6. 2026-08-28 20:45 UTCVendor advisory
  7. 2026-08-28 19:42 UTCEG score recompute▲ 7.40
  8. 2026-08-28 19:42 UTCVendor advisory
  9. 2026-08-28 19:36 UTCMITRE cvelistV5CVSS v3 → 7.4 · severity → HIGH
  10. 2026-08-28 01:14 UTCEG score recompute
  11. 2026-08-27 14:25 UTCEPSS rescore
  12. 2026-08-26 14:46 UTCEPSS rescore
  13. 2026-08-25 13:49 UTCEPSS rescore
  14. 2026-08-24 21:26 UTCVendor advisory
  15. 2026-08-24 21:25 UTCNVD update
  16. 2026-08-24 20:26 UTCEG score recompute
  17. 2026-08-24 20:26 UTCVendor advisory
  18. 2026-08-24 20:26 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-56135?
CVE-2026-56135 is a high vulnerability published on August 24, 2026. In NTFS-3G through 2026.2.25, a heap-based buffer overflow exists in the function buildinheritedid() in libntfs-3g/security.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 creating a file in a crafted…
When was CVE-2026-56135 disclosed?
CVE-2026-56135 was first published in the National Vulnerability Database on August 24, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56135 actively exploited?
CVE-2026-56135 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 98.9% of all scored CVEs.
What is the CVSS score of CVE-2026-56135?
CVE-2026-56135 has a CVSS v3.1 base score of 7.4 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-56135?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56135, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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