CVE-2026-107634

MEDIUMPre-NVD 6.16.1
EchelonGraph scoreHIGH confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 6.1 from GitHub Security Advisory published 2026-10-08. A secondary CVSS source baseline 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this week

Also known asEUVD-2026-95021 (ENISA EUVD) · GHSA-gj99-98mp-m7r6 (GitHub Security Advisories)Source: ENISA EUVD

6.1EG
EchelonGraph verdictMonitorThe upstream fix is not in a release yet: until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule, then apply it (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 6.1Exploit: 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 a heap out-of-bounds read vulnerability in get_dataset() and get_next_datum() that never validate dataset and datum sizes against the metadata allocation. Attackers can craft a BitLocker volume image with inflated dataset or datum sizes that, when opened or mounted, crashes dislocker or discloses adjacent heap memory.

CVSS v3
6.1
EG Score
6.1MEDIUMhigh confidence
EG Risk
28
EG Risk 28/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity61% × 45%
Impact severity (EG Severity): CVSS 6.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: An upstream fix is merged but not yet in a tagged release. Until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule, then apply it.
EPSS PROB
0.1%
EPSS %ILE
2nd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (6.1): severity, escalated by confirmed exploitation. This CVE's 6.1 is its impact severity (EG Severity), not escalated.

EG Severity
6.1 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-28). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

An upstream fix is merged but not yet in a tagged release. Until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule, then apply it.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

October 8, 2026

Last Modified

October 10, 2026

Advisory Details (5)

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

Dislocker through 0.7.3 Heap Out-of-Bounds Read via BitLocker Metadata Dataset Size | Advisories | VulnCheck

https://www.vulncheck.com/advisories/dislocker-through-0.7.3-heap-out-of-bounds-read-via-bitlocker-metadata-dataset-size
Web page

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

https://github.com/Aorimn/dislocker
Web page

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

https://github.com/Aorimn/dislocker/blob/v0.7.3/src/metadata/datums.c#L589-L640
Web page

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

https://github.com/Aorimn/dislocker/blob/v0.7.3/src/metadata/metadata.c#L764-L790
GitHub commit

commit 9158e9e41dd6 (Aorimn/dislocker)

Fix landed in Aorimn/dislocker commit 9158e9e41dd6 — awaiting tagged release

https://github.com/Aorimn/dislocker/commit/9158e9e41dd669b360cbc53cc18ccae729b67b48

Vendor Advisories for CVE-2026-107634(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
dislocker0.7.3+git20240607-1 ... 0.7.3-3.1~exp1 (7 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
dislocker0.7.3+git20240607-3, 0.7.3+git20250907-1
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
dislocker0.7.3+git20240607-3, 0.7.3+git20250907-1
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 48× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-11-02 16:43 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  2. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  3. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  4. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  5. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  6. 2026-10-29 14:56 UTCEG score recompute
  7. 2026-10-29 14:56 UTCGHSA enrichmentGHSA-gj99-98mp-m7r6 · GitHub CVSS 6.1
  8. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  9. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  10. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  11. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-10-25 14:54 UTCEG score recompute
  13. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  15. 2026-10-23 08:38 UTCEG score recompute
  16. 2026-10-23 08:37 UTCGHSA enrichmentGHSA-gj99-98mp-m7r6 · GitHub CVSS 6.1
  17. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  18. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  20. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  21. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  22. 2026-10-18 05:07 UTCEG score recompute
  23. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  24. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
Show 23 more
  1. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  2. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  3. 2026-10-12 16:38 UTCEG score recompute
  4. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  5. 2026-10-12 02:36 UTCGHSA enrichmentGHSA-gj99-98mp-m7r6 · GitHub CVSS 6.1
  6. 2026-10-11 20:14 UTCEG score recompute
  7. 2026-10-11 18:26 UTCEG score recompute
  8. 2026-10-11 15:00 UTCEG score recompute
  9. 2026-10-11 03:29 UTCEG score recompute
  10. 2026-10-11 03:29 UTCGHSA enrichmentGHSA-gj99-98mp-m7r6 · GitHub CVSS 6.1
  11. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-10-10 04:22 UTCEG score recompute
  13. 2026-10-10 04:22 UTCGHSA enrichmentGHSA-gj99-98mp-m7r6 · GitHub CVSS 6.1
  14. 2026-10-10 03:21 UTCEG score recompute
  15. 2026-10-10 03:21 UTCGHSA enrichmentGHSA-gj99-98mp-m7r6 · GitHub CVSS 6.1
  16. 2026-10-09 20:44 UTCEG score recompute
  17. 2026-10-09 20:43 UTCGHSA enrichmentGHSA-gj99-98mp-m7r6 · GitHub CVSS 6.1
  18. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-10-08 21:38 UTCEG score recompute
  20. 2026-10-08 21:38 UTCGHSA enrichmentGHSA-gj99-98mp-m7r6 · GitHub CVSS 6.1
  21. 2026-10-08 15:20 UTCEG score recompute
  22. 2026-10-08 14:18 UTCEG score recomputeFirst assessed: 6.1 MEDIUM
  23. 2026-10-08 14:16 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-107634?
CVE-2026-107634 is a medium-severity vulnerability; its CVE record was published on October 8, 2026. Dislocker through 0.7.3 contains a heap out-of-bounds read vulnerability in get_dataset() and get_next_datum() that never validate dataset and datum sizes against the metadata allocation. Attackers can craft a BitLocker volume image with inflated dataset or datum sizes that, when opened or mounted,…
When was CVE-2026-107634 made public?
CVE-2026-107634 was made public on August 31, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on October 8, 2026. EchelonGraph's copy of the record carries a last-modified date of October 10, 2026; the record at its source may have been updated since.
Is CVE-2026-107634 actively exploited?
CVE-2026-107634 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-2026-107634?
CVE-2026-107634 has a CVSS base score of 6.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-107634?
An upstream fix for CVE-2026-107634 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-2026-107634 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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