Vulnerability in Youki-Dev Youki
CVE-2025-62596
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (17.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 17.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000
Affected products
- Youki-Dev Youki — versions < 0.5.7
Weakness classification (CWE)
References
- github.com/youki-dev/youki/security/advisories/GHSA-vf95-55w6-qmrf (Vendor Advisory)
- github.com/youki-dev/youki/commit/5886c91073b9be748bd8d5aed49c4a820548030a (Patch)
- pkg.go.dev/github.com/cyphar/filepath-securejoin/pathrs-lite/procfs (Not Applicable)
- youtu.be/tGseJW_uBB8 (Not Applicable)
- youtu.be/y1PaBzxwRWQ (Not Applicable)
Frequently asked questions
- What is CVE-2025-62596?
- CVE-2025-62596 is a critical-severity vulnerability in Youki-Dev Youki, classified under UNIX Symbolic Link (Symlink) Following. CVSS score: 10.0/10. Published 2025-11-06.
- How severe is CVE-2025-62596?
- Critical severity. CVSS v3 base score is 10.0 out of 10.