CVE-2025-62596: youki — Fix

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.

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CVSS v3.1 Score

10.0

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H

Weakness Type (CWE)

CWE-61 CWE-61

CWE-363 CWE-363

Affected Products

Vendor	Product	Versions
youki-dev	youki	< 0.5.7

References

Advisories & Patches

https://github.com/youki-dev/youki/commit/5886c91073b9be748bd8d5aed49c4a820548030a https://github.com/youki-dev/youki/security/advisories/GHSA-vf95-55w6-qmrf

Other References

https://pkg.go.dev/github.com/cyphar/filepath-securejoin/pathrs-lite/procfs https://youtu.be/tGseJW_uBB8 https://youtu.be/y1PaBzxwRWQ

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 10.0 (CRITICAL).

How severe is CVE-2025-62596? +

CVE-2025-62596 has a CVSS v3.1 score of 10.0 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2025-62596? +

CVE-2025-62596 affects products from youki-dev, specifically: youki. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-62596? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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