Youki is a container runtime written in Rust. In versions 0.5.6 and below, youki’s apparmor handling performs insufficiently strict write-target validation, and when combined with path substitution during pathname resolution, can allow writes to unintended procfs locations. While resolving a path component-by-component, a shared-mount race can substitute intermediate components and redirect the final target. This issue is fixed in version 0.5.7.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/youki-dev/youki/commit/5886c91073b9be748bd8d5aed49c4a820548030a Patch
- https://github.com/youki-dev/youki/security/advisories/GHSA-vf95-55w6-qmrf Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.3 · youki-devNVD modified 2026-10-19 13:10
Affected (CPE criteria) 1
cpe:2.3:a:youki-dev:youki:*:*:*:*:*:rust:*:*
References 5
- https://github.com/youki-dev/youki/commit/5886c91073b9be748bd8d5aed49c4a820548030a Patch
- https://github.com/youki-dev/youki/security/advisories/GHSA-vf95-55w6-qmrf Vendor Advisory
- https://pkg.go.dev/github.com/cyphar/filepath-securejoin/pathrs-lite/procfs Not Applicable
- https://youtu.be/tGseJW_uBB8 Not Applicable
- https://youtu.be/y1PaBzxwRWQ Not Applicable