# CVE-2026-93323: Oversized Dockerfile or .dockerignore can exhaust buildkitd memory

> CVE-2026-93323: Oversized Dockerfile or .dockerignore can exhaust buildkitd memory. CVSS 6.8 (CVSS 4.0).

Canonical: https://rewindex.com/cve/CVE-2026-93323
Last updated: 2026-10-06T15:08:38Z

- Published: 2026-10-05 17:57 UTC · Updated: 2026-10-06 15:08 UTC · Assigner: Docker
- CVSS: 6.8 (CVSS 4.0) · Severity: Medium
- EPSS: 0.11%, 1th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-789

## 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 vendors and products

- moby: BuildKit

## Tracked companies

- [Docker](https://rewindex.com/company/docker.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-93323)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-93323)
- [https://github.com/moby/buildkit/releases/tag/v0.33.1](https://github.com/moby/buildkit/releases/tag/v0.33.1)
- [https://github.com/moby/buildkit/security/advisories/GHSA-mgqf-486f-49vp](https://github.com/moby/buildkit/security/advisories/GHSA-mgqf-486f-49vp)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-93323 · Markdown: https://rewindex.com/cve/CVE-2026-93323.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-93323 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:15:06.743Z