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CVE-2026-93319

MEDIUM 5.7

Published 2026-10-05 · Last modified 2026-10-05

A malicious external BuildKit frontend can send requests using the internal API that can create conditions for a data race that can cause the BuildKit daemon to panic.

NO EXPLOITATION SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.1%chance of exploitation in 30 days · 0th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

5.7CVSS 4.0 · MEDIUM

  • ConfidentialityNone
  • IntegrityNone
  • AvailabilityHigh

What an attacker needs

  • ⚠Access: Requires local access to the host
  • ⚠Privileges: Requires a low-privilege account
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable
  • ⚠Requirements: Specific conditions must be present

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

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Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot:

Affected

Vendors Moby

Products Buildkit

Weakness (CWE)

  • CWE-567: : Unsynchronized Access to Shared Data in a Multi-threaded Context

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References and research data (JSON)

Vendor product assessments

  • quay/quay-builder-rhel8 as a component of Red Hat Quay 3 · known affected

    Vendor assessment for this product only.

    pkg:oci/quay-builder-rhel8?repository_url=registry.redhat.io/quay/quay-builder-rhel8

    • workaround: Restrict builds to trusted internal frontends by avoiding untrusted `#syntax` image directives or custom `--frontend` flags. Isolate multi-tenant build environments onto dedicated, single-tenant worker nodes to prevent shared daemon disruption.
    • none available: Fix deferred
    Red Hat · CVE-2026-93319 · Updated 2026-10-20T17:54:40+00:00
  • quay/quay-builder-rhel9 as a component of Red Hat Quay 3 · known affected

    Vendor assessment for this product only.

    pkg:oci/quay-builder-rhel9?repository_url=registry.redhat.io/quay/quay-builder-rhel9

    • workaround: Restrict builds to trusted internal frontends by avoiding untrusted `#syntax` image directives or custom `--frontend` flags. Isolate multi-tenant build environments onto dedicated, single-tenant worker nodes to prevent shared daemon disruption.
    • none available: Fix deferred
    Red Hat · CVE-2026-93319 · Updated 2026-10-20T17:54:40+00:00
  • buildah.src as a component of Red Hat Hardened Images · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/[email protected]?arch=src

    Red Hat · CVE-2026-93319 · Updated 2026-10-20T17:54:40+00:00
  • podman.src as a component of Red Hat Hardened Images · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/[email protected]?arch=src

    Red Hat · CVE-2026-93319 · Updated 2026-10-20T17:54:40+00:00
  • trivy.src as a component of Red Hat Hardened Images · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/[email protected]?arch=src

    Red Hat · CVE-2026-93319 · Updated 2026-10-20T17:54:40+00:00

All CVSS metrics

  • MEDIUM 5.7 v4.0 · CNA Primary
    CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  • MEDIUM 5.7 v4.0 · NVD Secondary
    CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

References

Patches & mitigations

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS