Mullvad wireguard.sys IOCTL AdapterState reference count
Priority MEDIUM 54CWE-664Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
A vulnerability was identified in Mullvad wireguard.sys 0.10.1. The affected element is the function AdapterState of the component IOCTL Handler. Such manipulation leads to improper update of reference count. Local access is required to approach this attack. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00168 6th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-19380
- 2026-10-03 Alias added: GHSA-vfrx-fwf3-jfq2
References
More Mullvad vulnerabilities
- TI-2026-24851 Mullvad VPN for macOS: Local Privilege Escalation via unverified bundle path in installer CVSS 3.1HIGH 7.8
- TI-2023-27592 An issue was discovered in Mullvad VPN Windows app before 2023.6-beta1. CVSS 3.1HIGH 7.8
Sources
- CVE-2026-19380 · CVE Program
- CVE-2026-19380 · NVD
- FIRST EPSS
- GHSA-vfrx-fwf3-jfq2 · 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