runc AppArmor bypass with symlinked /proc

HIGH 7.8CVE-2023-28642 · GHSA-g2j6-57v7-gm8c · GO-2023-1683 · Published 29/03/2023 · updated 17/06/2026

Package	Affected versions	Patched versions
github.com/opencontainers/runc Go	`< 1.1.5`	`1.1.5`
runc linuxfoundation	`< 1.1.5`	`1.1.5`

Description

Impact

It was found that AppArmor, and potentially SELinux, can be bypassed when /proc inside the container is symlinked with a specific mount configuration.

Patches

Fixed in runc v1.1.5, by prohibiting symlinked /proc: https://github.com/opencontainers/runc/pull/3785

This PR fixes CVE-2023-27561 as well.

Workarounds

Avoid using an untrusted container image.

NVD 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.

References

opencontainers/runc security advisory · WEB
nvd.nist.gov/vuln/detail/CVE-2023-28642 · ADVISORY
opencontainers/runc#3785 · WEB
opencontainers/runc · PACKAGE
security.netapp.com/advisory/ntap-20241206-0005 · WEB
security.netapp.com/advisory/ntap-20241206-0005

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