CVE-2024-23651 BuildKit possible race condition with accessing subpaths from cache mounts
A race condition in BuildKit allows malicious parallel build steps to access host system files via shared cache mounts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-23651?
CVE-2024-23651 is a high-severity vulnerability in moby buildkit, published on 31 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Two malicious build steps running in parallel sharing the same cache mounts with subpaths could cause a race condition that can lead to files from the host system being accessible to the build container. The issue has been fixed in v0.12.5. Workarounds include, avoiding using BuildKit frontend from an untrusted source or building an untrusted Dockerfile containing cache mounts with --mount=type=cache,source=... options.
Weakness: CWE-362
Which versions are affected by CVE-2024-23651?
3 open source packages ship an affected version, including github.com/moby/buildkit. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/moby/buildkit Go | All versions | 0.12.5 |
github.com/moby/buildkit Go | All versions | 0.12.5 |
github.com/moby/buildkit Go | All versions | 0.12.5 |
Products include Mobyproject Buildkit.
How do I fix CVE-2024-23651?
Upgrade github.com/moby/buildkit to 0.12.5 or later.
Is CVE-2024-23651 being exploited?
There is no known exploitation of CVE-2024-23651 in the wild and no public exploit code.
Other vulnerabilities in moby buildkit
- CVE-2024-23652 BuildKit possible host system access from mount stub cleaner
- CVE-2024-23653 BuildKit interactive containers API does not validate entitlements check
- CVE-2026-33747 BuildKit vulnerable to malicious frontend causing file escape outside of storage root
- CVE-2026-33748 BuildKit Git URL subdir component can cause access to restricted files
- CVE-2026-15789 Malicious client can bypass destination directory validation on local sources upload
Sources
Also known as AZL-34085, AZL-35005, BELL-CVE-2024-23651, CLEANSTART-2025-MU54155, CLEANSTART-2026-HB39475, GHSA-m3r6-h7wv-7xxv and 2 more.