Bug 2546174 (CVE-2026-93321)

Summary: CVE-2026-93321 github.com/moby/buildkit: BuildKit: Denial of Service via crafted low-level builder definition
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: doconnor
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in BuildKit. A malicious build frontend can submit a crafted low-level builder (LLB) definition that triggers an unexpected panic in the BuildKit daemon. This issue leads to a Denial of Service (DoS), causing the daemon process to crash and interrupting all active builds running on the host.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-10-05 22:21:18 UTC
A malicious frontend can submit an LLB definition that causes buildkitd
to panic and terminate, interrupting all builds running on that daemon.