CVE-2025-54867: Youki Symlink Following Vulnerability

Severity: high (CVSS 7.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-08-14 · updated 2026-06-17
Weakness: CWE-61

Description

Youki is a container runtime written in Rust. Prior to version 0.5.5, if /proc and /sys in the rootfs are symbolic links, they can potentially be exploited to gain access to the host root filesystem. This issue has been patched in version 0.5.5.

Affected products

youki-dev youki: before 0.5.5 — fixed in 0.5.5

How to fix

Upgrade to a fixed version: youki-dev youki 0.5.5. Check the vendor advisory for mitigations.

References

https://github.com/youki-dev/youki/commit/0d9b4f2aa5ceaf988f3eb568711d2acf0a4ace37
https://github.com/youki-dev/youki/releases/tag/v0.5.5
https://github.com/youki-dev/youki/security/advisories/GHSA-j26p-6wx7-f3pw

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