Docker Sandboxes UDS forwarder can reach arbitrary host Unix sockets through a symlink race (CVE-2026-79994) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-79994

Docker Sandboxes UDS forwarder can reach arbitrary host Unix sockets through a symlink race

Answer in brief

CVE-2026-79994 records a Unknown severity vulnerability in Docker Sandboxes UDS forwarder can reach arbitrary host Unix sockets through a symlink race. The current sources do not mark it as known exploited. The current feed maps Docker/Docker Sandboxes (generic), Docker/Docker Sandboxes (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 15, 2026Updated Sep 15, 2026Source checked Sep 15, 2026First seen by HOL Sep 15, 2026Material review Sep 15, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Docker/Docker Sandboxes (generic), Docker/Docker Sandboxes (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Docker/Docker Sandboxesgeneric	>=0.37.0 <0.41.0	0.41.0
Docker/Docker Sandboxesgeneric	>=0.37.0 <0.42.0	0.42.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for Docker/Docker Sandboxes, Docker/Docker Sandboxes.
Review the reported fix. Update Docker/Docker Sandboxes to 0.41.0; Docker/Docker Sandboxes to 0.42.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 15, 2026

Sources and claim methodology

Upstream source description

The guest-to-host Unix-domain socket relay in Docker Sandboxes validates that a socket path is inside an authorized workspace, but later reconnects using the pathname. A malicious guest can replace an intermediate directory with a symlink between validation and connection, causing the host to connect to an arbitrary AF_UNIX socket outside the shared workspace. This can expose data or host-side capabilities provided by the targeted socket.

Quoted source text, attributed separately from HOL analysis.