CVE-2026-79994
CVE-2026-79994 · Docker Sandboxes UDS forwarder can reach arbitrary host Unix sockets through a symlink race
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 8.7 · High · EPSS 0.1% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
docker sandboxes
- Versions
- ≥ 0.37.0, < 0.42.0: Affected (semver)
Update to 0.42.0
docker.io Ubuntu:Pro:16.04:LTS
- Versions
- 1.6.2~dfsg1-1ubuntu4
- 1.10.2-0ubuntu3
- 1.10.2-0ubuntu4
- 1.10.3-0ubuntu1
- 1.10.3-0ubuntu4
- 1.10.3-0ubuntu5
- 1.10.3-0ubuntu6
- 1.11.2-0ubuntu5~16.04
- 1.12.1-0ubuntu13~16.04.1
- 1.12.3-0ubuntu4~16.04.2
- 1.12.6-0ubuntu1~16.04.1
- 1.13.1-0ubuntu1~16.04.2
- 17.03.2-0ubuntu2~16.04.1
- 18.06.1-0ubuntu1~16.04.2
- 18.06.1-0ubuntu1.2~16.04.1
- 18.09.2-0ubuntu1~16.04.1
- 18.09.5-0ubuntu1~16.04.2
- 18.09.7-0ubuntu1~16.04.1
- 18.09.7-0ubuntu1~16.04.4
- 18.09.7-0ubuntu1~16.04.5
- 18.09.7-0ubuntu1~16.04.6
- 18.09.7-0ubuntu1~16.04.7
- 18.09.7-0ubuntu1~16.04.9+esm1
- 18.09.7-0ubuntu1~16.04.9+esm2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
docker.io Ubuntu:Pro:18.04:LTS
- Versions
- 1.13.1-0ubuntu6
- 17.03.2-0ubuntu1
- 17.03.2-0ubuntu3
- 17.03.2-0ubuntu5
- 17.12.1-0ubuntu1
- 18.06.1-0ubuntu1~18.04.1
- 18.06.1-0ubuntu1.2~18.04.1
- 18.09.2-0ubuntu1~18.04.1
- 18.09.5-0ubuntu1~18.04.2
- 18.09.7-0ubuntu1~18.04.1
- 18.09.7-0ubuntu1~18.04.3
- 18.09.7-0ubuntu1~18.04.4
- 19.03.6-0ubuntu1~18.04.1
- 19.03.6-0ubuntu1~18.04.2
- 19.03.6-0ubuntu1~18.04.3
- 20.10.2-0ubuntu1~18.04.2
- 20.10.2-0ubuntu1~18.04.3
- 20.10.7-0ubuntu1~18.04.1
- 20.10.7-0ubuntu1~18.04.2
- 20.10.7-0ubuntu5~18.04.2
- 20.10.7-0ubuntu5~18.04.3
- 20.10.12-0ubuntu2~18.04.1
- 20.10.21-0ubuntu1~18.04.2
- 20.10.21-0ubuntu1~18.04.3
- 20.10.21-0ubuntu1~18.04.3+esm1
- 20.10.21-0ubuntu1~18.04.3+esm2
- 20.10.21-0ubuntu1~18.04.3+esm3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
docker.io Ubuntu:Pro:20.04:LTS
- Versions
- 19.03.2-0ubuntu1
- 19.03.6-0ubuntu1
- 19.03.8-0ubuntu1
- 19.03.8-0ubuntu1.20.04
- 19.03.8-0ubuntu1.20.04.1
- 19.03.8-0ubuntu1.20.04.2
- 20.10.2-0ubuntu1~20.04.2
- 20.10.2-0ubuntu1~20.04.3
- 20.10.7-0ubuntu1~20.04.1
- 20.10.7-0ubuntu1~20.04.2
- 20.10.7-0ubuntu5~20.04.1
- 20.10.7-0ubuntu5~20.04.2
- 20.10.12-0ubuntu2~20.04.1
- 20.10.21-0ubuntu1~20.04.1
- 20.10.21-0ubuntu1~20.04.2
- 20.10.21-0ubuntu1~20.04.4
- 20.10.21-0ubuntu1~20.04.5
- 20.10.21-0ubuntu1~20.04.6
- 20.10.21-0ubuntu1~20.04.6+esm1
- 20.10.21-0ubuntu1~20.04.6+esm2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
docker.io-app Ubuntu:Pro:20.04:LTS
- Versions
- 20.10.25-0ubuntu1~20.04.1
- 20.10.25-0ubuntu1~20.04.2
- 24.0.5-0ubuntu1~20.04.1
- 24.0.7-0ubuntu2~20.04.1
- 26.1.3-0ubuntu1~20.04.1
- 26.1.3-0ubuntu1~20.04.1+esm1
- 26.1.3-0ubuntu1~20.04.1+esm2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
docker.io Ubuntu:Pro:22.04:LTS
- Versions
- 20.10.7-0ubuntu5
- 20.10.7-0ubuntu7
- 20.10.12-0ubuntu1
- 20.10.12-0ubuntu2
- 20.10.12-0ubuntu3
- 20.10.12-0ubuntu3+gke1.24.1
- 20.10.12-0ubuntu4
- 20.10.21-0ubuntu1~22.04.2
- 20.10.21-0ubuntu1~22.04.3
- 20.10.21-0ubuntu1~22.04.5
- 20.10.21-0ubuntu1~22.04.6
- 20.10.21-0ubuntu1~22.04.7
- 20.10.21-0ubuntu1~22.04.7+esm1
- 20.10.21-0ubuntu1~22.04.7+esm2
- 20.10.21-0ubuntu1~22.04.8
- 20.10.21-0ubuntu1~22.04.8+esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
docker.io-app Ubuntu:Pro:22.04:LTS
- Versions
- 20.10.25-0ubuntu1~22.04.1
- 20.10.25-0ubuntu1~22.04.2
- 24.0.5-0ubuntu1~22.04.1
- 24.0.7-0ubuntu2~22.04.1
- 26.1.3-0ubuntu1~22.04.1
- 26.1.3-0ubuntu1~22.04.1+esm1
- 27.5.1-0ubuntu3~22.04.1
- 27.5.1-0ubuntu3~22.04.2
- 28.2.2-0ubuntu1~22.04.1
- 29.1.3-0ubuntu3~22.04.1
- 29.1.3-0ubuntu3~22.04.2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
docker.io Ubuntu:Pro:24.04:LTS
- Versions
- 20.10.24+dfsg1-1ubuntu2
- 20.10.25+dfsg1-2ubuntu1
- 20.10.25+dfsg1-2ubuntu1+esm1
- 20.10.25+dfsg1-2ubuntu1+esm2
- 20.10.25+dfsg1-2ubuntu1.24.04.1
- 20.10.25+dfsg1-2ubuntu1.24.04.1+esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
docker.io-app Ubuntu:Pro:24.04:LTS
- Versions
- 24.0.5-0ubuntu1
- 24.0.7-0ubuntu1
- 24.0.7-0ubuntu2
- 24.0.7-0ubuntu3
- 24.0.7-0ubuntu4
- 24.0.7-0ubuntu4.1
- 26.1.3-0ubuntu1~24.04.1
- 26.1.3-0ubuntu1~24.04.1+esm1
- 27.5.1-0ubuntu3~24.04.1
- 27.5.1-0ubuntu3~24.04.2
- 28.2.2-0ubuntu1~24.04.1
- 29.1.3-0ubuntu3~24.04.1
- 29.1.3-0ubuntu3~24.04.2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
docker.io Ubuntu:26.10
- Versions
- 27.5.1+dfsg4-2ubuntu1
- 28.5.2+dfsg4-5ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
docker.io-app Ubuntu:26.10
- Versions
- 29.1.3-0ubuntu4
- 29.1.3-0ubuntu5
- 29.1.3-0ubuntu6
- 29.7.2-0ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
docker.io Ubuntu:26.04:LTS
- Versions
- 26.1.5+dfsg1-9ubuntu1
- 27.5.1+dfsg4-1ubuntu1
- 27.5.1+dfsg4-2ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
docker.io-app Ubuntu:26.04:LTS
- Versions
- 28.2.2-0ubuntu1
- 29.1.2-0ubuntu1
- 29.1.3-0ubuntu1
- 29.1.3-0ubuntu2
- 29.1.3-0ubuntu3
- 29.1.3-0ubuntu4
- 29.1.3-0ubuntu4.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published