BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to 0.31.1, BuildKit read attacker-controlled /etc/passwd and /etc/group files without an upper bound while resolving a username to a user identifier or group identifier in executor/oci/user.go and solver/llbsolver/ops/user_linux.go. A malicious base image or build could provide oversized files that exhausted memory during user resolution and caused out-of-memory termination of the buildkitd process. This issue is fixed in version 0.31.1.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-72x6-4j93-7w86 BuildKit has a possible runtime DoS via unbounded group parsing
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 19 Aug 2026 20:15:00 +0000

Type Values Removed Values Added
Description BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to 0.31.1, BuildKit read attacker-controlled /etc/passwd and /etc/group files without an upper bound while resolving a username to a user identifier or group identifier in executor/oci/user.go and solver/llbsolver/ops/user_linux.go. A malicious base image or build could provide oversized files that exhausted memory during user resolution and caused out-of-memory termination of the buildkitd process. This issue is fixed in version 0.31.1.
Title BuildKit: Possible runtime DoS via unbounded group parsing
Weaknesses CWE-770
References
Metrics cvssV4_0

{'score': 2.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-19T20:01:18.074Z

Reserved: 2026-07-10T18:51:13.920Z

Link: CVE-2026-61712

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-19T20:17:19.730

Modified: 2026-08-19T20:17:19.730

Link: CVE-2026-61712

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses