What’s Vulnerable › Vulnerabilities

CVE-2023-28642: AppArmor bypass with symlinked /proc in runc

• 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: 2023-03-29 · updated 2026-06-17
• Weakness: CWE-281

Description

runc is a CLI tool for spawning and running containers according to the OCI specification. It was found that AppArmor can be bypassed when `/proc` inside the container is symlinked with a specific mount configuration. This issue has been fixed in runc version 1.1.5, by prohibiting symlinked `/proc`. See PR #3785 for details. users are advised to upgrade. Users unable to upgrade should avoid using an untrusted container image.

Affected products

• opencontainers runc: before 1.1.5 — fixed in 1.1.5

How to fix

Upgrade to a fixed version: opencontainers runc 1.1.5. Check the vendor advisory for mitigations.

References

• https://github.com/opencontainers/runc/pull/3785
• https://github.com/opencontainers/runc/security/advisories/GHSA-g2j6-57v7-gm8c
• https://github.com/opencontainers/runc/pull/3785
• https://github.com/opencontainers/runc/security/advisories/GHSA-g2j6-57v7-gm8c
• https://security.netapp.com/advisory/ntap-20241206-0005/

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