# CVE-2026-112917: Docker Desktop WSL2 AF_VSOCK isolation bypass via 32-bit socketcall

Status: published. Published: 2026-11-03. Updated: 2026-11-04.

In Docker Desktop for Windows with the WSL2 backend, an unprivileged Linux container can use 32-bit socketcall to bypass the default seccomp restriction on AF_VSOCK. This can expose host-facing services and Windows files accessible to the logged-in user. The issue affects x86-64 WSL2; LinuxKit-based backends are unaffected. The issue is fully fixed only with Docker Desktop 4.98.0 or later and WSL 3.0.3 or later. Docker Desktop 4.98.0 or later running on an older WSL remains affected.

## Remediation

- fix: Upgrade to Docker Desktop 4.98.0 or later and WSL 3.0.3 or later. Both are required. (source: CNA: Docker)

## Affected products and versions

- Docker / Docker Desktop: ≥ 4.98.0; < * (unaffected, semver). Source: CNA: Docker; platforms: Windows

## Severity and prioritization

- CVSS 4.0: 9.2 (critical); CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N; source: CNA: Docker

- CVSS 4.0: 9.2 (critical); CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: security@docker.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-424

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://docs.docker.com/desktop/release-notes/#4980 (CNA: Docker; release-notes)

- https://github.com/microsoft/WSL/releases/tag/3.0.3 (CNA: Docker; release-notes)

- https://github.com/microsoft/WSL2-Linux-Kernel/releases/tag/linux-msft-wsl-6.18.54.1 (CNA: Docker; release-notes)

- https://docs.docker.com/desktop/release-notes/#4980 (security@docker.com)

- https://github.com/microsoft/WSL/releases/tag/3.0.3 (security@docker.com)

- https://github.com/microsoft/WSL2-Linux-Kernel/releases/tag/linux-msft-wsl-6.18.54.1 (security@docker.com)

## Provenance

- CNA: Docker: https://www.cve.org/CVERecord?id=CVE-2026-112917; retrieved 2026-11-04; source updated 2026-11-04

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-112917; retrieved 2026-11-04; source updated 2026-11-04

Revision: ed41166f392e8574b5e3807976c1a881c7bd1fd25b1ed5ff7c96679e286130df

Canonical: https://y2.dev/cve/CVE-2026-112917

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