Description
VeraCrypt 1.26.29 (FUSE-T build) on macOS sometimes allows unintended access to decrypted data. It does not terminate the FUSE-T auxiliary service (go-nfsv4) and its associated VeraCrypt core-service helper processes when a volume is dismounted. After VeraCrypt reports the volume as dismounted, the auxiliary mount continues to serve the decrypted volume image (volume.dmg) over a loopback SMB session, and the leaked processes retain an open handle to the underlying raw device. A local user or process can therefore remount and access the decrypted volume without the passphrase, e.g., by reopening a previously accessed path (such as through a macOS Open Recent menu) or by attaching volume.dmg from the stale auxiliary mount. (The macFUSE build of VeraCrypt is not affected.)
Published: 2026-10-12
Score: 7.2 High
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

Vendor Solution

No fixed release as of 2026-10-11. A community fix exists as VeraCrypt pull request #1866 (commit 000bcf4): on dismount, explicitly shut down the auxiliary FUSE-T service through an authenticated control endpoint and wait for it to terminate before reporting the dismount as complete. The maintainer described the same approach in issue #1779. The macFUSE build of VeraCrypt is unaffected.


Vendor Workaround

Use the macFUSE build of VeraCrypt instead of the FUSE-T build (the maintainer's recommended interim mitigation; the macFUSE build is not affected). If staying on the FUSE-T build: After dismounting your volumes, restart macOS to end any surviving sessions. Using the affected FUSE-T build again can recreate the problem. Updating FUSE-T alone hasn't been verified as a fix. A process name match can't reliably identify every surviving VeraCrypt service. Manual process killing shouldn't be treated as proof that access has ended, and killing a service while a volume is still mounted can interrupt writes.

Tracking

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Advisories

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History

Thu, 15 Oct 2026 03:00:00 +0000


Tue, 13 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 12 Oct 2026 05:15:00 +0000

Type Values Removed Values Added
Title VeraCrypt FUSE-T Auxiliary Service Leak Exposes Decrypted Data

Mon, 12 Oct 2026 03:00:00 +0000

Type Values Removed Values Added
Description VeraCrypt 1.26.29 (FUSE-T build) on macOS sometimes allows unintended access to decrypted data. It does not terminate the FUSE-T auxiliary service (go-nfsv4) and its associated VeraCrypt core-service helper processes when a volume is dismounted. After VeraCrypt reports the volume as dismounted, the auxiliary mount continues to serve the decrypted volume image (volume.dmg) over a loopback SMB session, and the leaked processes retain an open handle to the underlying raw device. A local user or process can therefore remount and access the decrypted volume without the passphrase, e.g., by reopening a previously accessed path (such as through a macOS Open Recent menu) or by attaching volume.dmg from the stale auxiliary mount. (The macFUSE build of VeraCrypt is not affected.)
First Time appeared Idrix
Idrix veracrypt
Weaknesses CWE-459
CPEs cpe:2.3:a:idrix:veracrypt:*:*:*:*:*:*:*:*
Vendors & Products Idrix
Idrix veracrypt
References
Metrics cvssV4_0

{'score': 7.2, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-10-15T02:49:02.840Z

Reserved: 2026-10-12T02:44:03.885Z

Link: CVE-2026-108982

cve-icon Vulnrichment

Updated: 2026-10-13T18:25:37.840Z

cve-icon NVD

Status : Received

Published: 2026-10-12T03:17:18.667

Modified: 2026-10-15T03:17:06.633

Link: CVE-2026-108982

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-12T05:00:08Z

Weaknesses