What’s Vulnerable › Vulnerabilities

CVE-2024-23652: BuildKit possible host system access from mount stub cleaner

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-01-31 · updated 2026-06-17
• Weakness: CWE-22

Description

BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. A malicious BuildKit frontend or Dockerfile using RUN --mount could trick the feature that removes empty files created for the mountpoints into removing a file outside the container, from the host system. The issue has been fixed in v0.12.5. Workarounds include avoiding using BuildKit frontends from an untrusted source or building an untrusted Dockerfile containing RUN --mount feature.

Affected products

• moby BuildKit: before 0.12.5 — fixed in 0.12.5

How to fix

Upgrade to a fixed version: moby BuildKit 0.12.5. Check the vendor advisory for mitigations.

References

• https://github.com/moby/buildkit/pull/4603
• https://github.com/moby/buildkit/releases/tag/v0.12.5
• https://github.com/moby/buildkit/security/advisories/GHSA-4v98-7qmw-rqr8
• https://github.com/moby/buildkit/pull/4603
• https://github.com/moby/buildkit/releases/tag/v0.12.5
• https://github.com/moby/buildkit/security/advisories/GHSA-4v98-7qmw-rqr8

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