Bug 2546170 (CVE-2026-93315)

Summary: CVE-2026-93315 github.com/moby/buildkit: BuildKit: Denial of Service via manipulated CA bundle during cleanup
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in BuildKit. When proxy networking with Certificate Authority (CA) injection is enabled, a build can modify its CA certificate bundle before cleanup operations execute. A local user running a build can exploit this issue to cause the cleanup process to hang, resulting in a Denial of Service (DoS), or trigger file modifications outside the build's intended root filesystem (rootfs).
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Description OSIDB Bzimport 2026-10-05 22:01:30 UTC
When proxy networking with CA injection is enabled, a build can modify its CA bundle before cleanup. This may cause cleanup to block, operate outside the build rootfs, or fail without failing the build.