CVE-2025-62596
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-11-06

Last updated on: 2025-11-10

Assigner: GitHub, Inc.

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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Meta Information
Published
2025-11-06
Last Modified
2025-11-10
Generated
2026-06-16
AI Q&A
2025-11-06
EPSS Evaluated
2026-06-15
NVD
CVE-2025-62596
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
youki-dev youki to 0.5.7 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-363 The product checks the status of a file or directory before accessing it, which produces a race condition in which the file can be replaced with a link before the access is performed, causing the product to access the wrong file.
CWE-61 The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files.
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Executive Summary

This vulnerability in Youki container runtime (versions 0.5.6 and below) involves insufficiently strict validation of write targets in its AppArmor handling. When combined with path substitution during pathname resolution, an attacker can exploit a shared-mount race condition to substitute intermediate path components and redirect writes to unintended procfs locations. This can lead to unauthorized writes to sensitive system files. The issue is fixed in version 0.5.7.

Impact Analysis

The vulnerability can allow an attacker with limited privileges to write to unintended procfs locations, potentially leading to unauthorized modification of system files or configurations. This could compromise system integrity, escalate privileges, or disrupt container runtime behavior, impacting the security and stability of the affected system.

Mitigation Strategies

Upgrade youki to version 0.5.7 or later, as this version contains the fix for the insufficiently strict write-target validation issue in apparmor handling.

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