CVE-2026-61712Medium· 5.5▾ SunlitA flaw was found in BuildKit. A remote attacker could provide a malicious base image or build with oversized /etc/passwd and /etc/group files. When BuildKit attempts to resolve usernames or group identifiers from these files, it reads them…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 20.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.4%
0.4% → 0.5%
— → 5.5
low → medium
Last analysed / modified upstream
A flaw was found in BuildKit. A remote attacker could provide a malicious base image or build with oversized /etc/passwd and /etc/group files. When BuildKit attempts to resolve usernames or group identifiers from these files, it reads them without an upper bound, leading to excessive memory consumption. This can cause the buildkitd process to terminate due to out-of-memory errors, resulting in a Denial of Service (DoS).
github.com/moby/buildkit: BuildKit: Denial of Service via unbounded group parsing — rated Moderate by Red Hat. Released 2026-08-19, updated 2026-10-16.
Affected:
No fix planned:
Not affected:
Out of support scope
Workarounds / mitigations:
Affected packages:
github.com/moby/buildkit < 0.31.1Patched in:
github.com/moby/buildkit 0.31.1Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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