What’s Vulnerable › Vulnerabilities

CVE-2025-62596: youki container escape and denial of service due to arbitrary write gadgets and procfs write redirects

• Severity: critical (CVSS 10.0 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: 2025-11-06 · updated 2026-10-19
• Weakness: CWE-61

Description

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.

Affected products

• youki-dev youki: before 0.5.7 — fixed in 0.5.7

How to fix

Upgrade to a fixed version: youki-dev youki 0.5.7. Check the vendor advisory for mitigations.

References

• https://github.com/youki-dev/youki/commit/5886c91073b9be748bd8d5aed49c4a820548030a
• https://github.com/youki-dev/youki/security/advisories/GHSA-vf95-55w6-qmrf
• https://pkg.go.dev/github.com/cyphar/filepath-securejoin/pathrs-lite/procfs
• https://youtu.be/tGseJW_uBB8
• https://youtu.be/y1PaBzxwRWQ

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