CVE-2026-107635

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreHIGH confidence

Score 5.5 from GitHub Security Advisory published 2026-10-08. A secondary CVSS source baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 5.5Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

Dislocker through 0.7.3 contains an integer underflow vulnerability in get_vmk() and get_fvek() that allows attackers to trigger out-of-bounds heap reads via crafted datum sizes. Attackers can supply a malicious BitLocker volume image with a datum_size smaller than the 36-byte AES-CCM header, causing hexdump() to over-read and crash dislocker.

CVSS v3
5.5
EG Score
5.5MEDIUMhigh confidence
EG Risk
25
EG Risk 25/100CISA 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 computed
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.1%
EPSS %ILE
2nd
KEV
Not listed

CISA SSVCTrack at every mission impact level.

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

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 8, 2026

Last Modified

October 8, 2026

Advisory Details (5)

Auto-updated Oct 8, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

Dislocker through 0.7.3 Out-of-Bounds Heap Read via VMK/FVEK Datum Size Underflow | Advisories | VulnCheck

https://www.vulncheck.com/advisories/dislocker-through-0.7.3-out-of-bounds-heap-read-via-vmk-fvek-datum-size-underflow
generic

GitHub - Aorimn/dislocker: FUSE driver to read/write Windows' BitLocker-ed volumes under Linux / Mac OSX · GitHub

https://github.com/Aorimn/dislocker
generic

dislocker/src/metadata/fvek.c at v0.7.3 · Aorimn/dislocker · GitHub

https://github.com/Aorimn/dislocker/blob/v0.7.3/src/metadata/fvek.c#L90-L105
generic

dislocker/src/metadata/vmk.c at v0.7.3 · Aorimn/dislocker · GitHub

https://github.com/Aorimn/dislocker/blob/v0.7.3/src/metadata/vmk.c#L146-L180
github_commit

commit 0706462db88e (Aorimn/dislocker)

Fix landed in Aorimn/dislocker commit 0706462db88e — awaiting tagged release

https://github.com/Aorimn/dislocker/commit/0706462db88efe8df88150e4c3e4332b808f4581

Vendor Advisories for CVE-2026-107635(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 10× 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. 2026-10-09 21:19 UTCEG score recompute
  2. 2026-10-09 21:19 UTCGHSA enrichment
  3. 2026-10-09 20:06 UTCEPSS rescore
  4. 2026-10-08 21:38 UTCEG score recompute
  5. 2026-10-08 21:38 UTCGHSA enrichment
  6. 2026-10-08 16:17 UTCEG score recompute
  7. 2026-10-08 16:16 UTCGHSA enrichment
  8. 2026-10-08 15:20 UTCEG score recompute
  9. 2026-10-08 14:17 UTCEG score recompute
  10. 2026-10-08 14:16 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-107635?
CVE-2026-107635 is a medium vulnerability published on October 8, 2026. Dislocker through 0.7.3 contains an integer underflow vulnerability in getvmk() and getfvek() that allows attackers to trigger out-of-bounds heap reads via crafted datum sizes. Attackers can supply a malicious BitLocker volume image with a datum_size smaller than the 36-byte AES-CCM header, causing…
When was CVE-2026-107635 disclosed?
CVE-2026-107635 was first published on October 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-107635 actively exploited?
CVE-2026-107635 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-107635?
CVE-2026-107635 has a CVSS base score of 5.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-107635?
An upstream fix for CVE-2026-107635 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-107635 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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