VeraCrypt FUSE-T build on macOS exposes data after dismount
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
VeraCrypt from 1.26.29 in the FUSE-T build on macOS does not stop the FUSE-T auxiliary service and its helper processes when a volume is dismounted (CWE-459). A local user or process can access the decrypted volume without the passphrase after it is dismounted, for example by reopening a previously accessed path. The macFUSE build of VeraCrypt is not affected.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
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.)
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
The sources list no fixed version for VeraCrypt.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Timeline
- 2026-10-12 Threatist record created from CVE-2026-108982
- 2026-10-12 Alias added: GHSA-h6r2-r3xv-333f
- 2026-10-12 Priority changed: MEDIUM → LOW
- 2026-10-13 CISA SSVC decision points changed
- 2026-10-13 Priority changed: LOW → HIGH
- 2026-10-15 2 new references · CNA
References
Other 7
- Original public report (June 2026) with maintainer acknowledgment and diagnosis
- Independent report with first process-level diagnosis and maintainer reply (June 2026)
- Consolidated issue: reproductions, lsof evidence, kernel panic analysis, status
- Community fix: terminate auxiliary FUSE-T service on dismount
- Affected release 1.26.29
- https://github.com/veracrypt/VeraCrypt/security/advisories/GHSA-f3px-f8h2-fm4c
- https://github.com/veracrypt/VeraCrypt/commit/d7bc65bed004996d299ec76666d1b283a07e2526
More IDRIX vulnerabilities
- TI-2016-01175 Untrusted search path vulnerability in the installer for TrueCrypt 7.2 and 7.1a… CVSS 3.0HIGH 7.8
- TI-2015-06114 The IsDriveLetterAvailable method in Driver/Ntdriver.c in TrueCrypt 7.0, VeraCrypt before… CVSS 3.0HIGH 7.8
- TI-2015-06115 The (1) IsVolumeAccessibleByCurrentUser and (2) MountDevice methods in Ntdriver.c in… CVSS 3.0HIGH 7.8
- TI-2019-14049 VeraCrypt 1.24 allows Local Privilege Escalation during execution of VeraCryptExpander.exe. CVSS 3.1HIGH 7.8
- TI-2019-16023 Memory corruption in IDRIX, Truecrypt Veracrypt, Truecrypt CVSS 3.0LOW 3.3
Sources
- CVE-2026-108982 · CVE Program
- CVE-2026-108982 · NVD
- FIRST EPSS
- GHSA-h6r2-r3xv-333f · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences