What’s Vulnerable › Vulnerabilities

CVE-2024-40635: containerd has an integer overflow in User ID handling

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-03-17 · updated 2026-06-17
• Weakness: CWE-190

Description

containerd is an open-source container runtime. A bug was found in containerd prior to versions 1.6.38, 1.7.27, and 2.0.4 where containers launched with a User set as a `UID:GID` larger than the maximum 32-bit signed integer can cause an overflow condition where the container ultimately runs as root (UID 0). This could cause unexpected behavior for environments that require containers to run as a non-root user. This bug has been fixed in containerd 1.6.38, 1.7.27, and 2.04. As a workaround, ensure that only trusted images are used and that only trusted users have permissions to import images.

Affected products

• Debian Linux: 11.0
• containerd: before 1.6.38; from 1.7.0 before 1.7.27; from 2.0.0 before 2.0.4 — fixed in 1.6.38, 1.7.27, 2.0.4

How to fix

Upgrade to a fixed version: containerd 1.6.38, 1.7.27, 2.0.4. Check the vendor advisory for mitigations.

References

• https://github.com/containerd/containerd/commit/05044ec0a9a75232cad458027ca83437aae3f4da
• https://github.com/containerd/containerd/commit/1a43cb6a1035441f9aca8f5666a9b3ef9e70ab20
• https://github.com/containerd/containerd/commit/cf158e884cfe4812a6c371b59e4ea9bc4c46e51a
• https://github.com/containerd/containerd/security/advisories/GHSA-265r-hfxg-fhmg
• https://lists.debian.org/debian-lts-announce/2025/05/msg00005.html

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