CVE-2026-15792

A flaw was found in BuildKit. A malicious BuildKit client or frontend can craft a specially designed request, leading to the BuildKit daemon crashing. This vulnerability results in a denial of service (DoS), making the BuildKit service unavailable.

BuildKit is used by several Red Hat products to build container images. This issue allows a malicious BuildKit frontend or client to cause the BuildKit build process to crash. Exploiting this issue requires the ability to supply a build definition (for example, a Dockerfile specifying a custom #syntax frontend) to a BuildKit-based build; it does not allow remote code execution or exposure of data. The issue is fixed upstream in BuildKit version 0.31.2. Red Hat Hardened Images (Buildah, Podman, and Trivy) has already shipped the fixed version. Other affected Red Hat products are being assessed and will ship the fixed version of BuildKit in upcoming releases.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Avoid building container images using BuildKit frontends from untrusted sources. A BuildKit frontend is typically specified using a "# syntax" directive at the top of a Dockerfile, or with the "--frontend" option to the "buildctl build" command. Only use frontend images that come from a trusted source.