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CVE-2026-93323

Oversized Dockerfile or .dockerignore can exhaust buildkitd memory

MEDIUM
6.8
CVSS Score
Published: October 5, 2026 at 05:57 PM UTC
Updated: October 6, 2026 at 03:08 PM UTC
1 product affected across 1 vendorBuildKit

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Severity
MEDIUM6.8
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

The Dockerfile frontend loaded the Dockerfile and .dockerignore files of a build context into memory without a size limit. A build context containing an oversized file could make buildkitd allocate memory proportional to that file, potentially exhausting memory and terminating the daemon, which interrupts other builds on the same instance. Fixed by rejecting such files above 16 MiB.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

BuildKit· Moby
60%
v ≤ 0.33.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor Advisory
Source: cverecord
https://github.com/moby/buildkit/security/advisories/GHSA-mgqf-486f-49vp
Patch
Source: cverecord
https://github.com/moby/buildkit/releases/tag/v0.33.1

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.8MEDIUMDocker
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-789

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