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.
References (5)
Core 5
Core References
Vendor Advisory x_refsource_confirm
https://github.com/youki-dev/youki/security/advisories/GHSA-vf95-55w6-qmrf
Patch x_refsource_misc
https://github.com/youki-dev/youki/commit/5886c91073b9be748bd8d5aed49c4a820548030a
Not Applicable x_refsource_misc
https://pkg.go.dev/github.com/cyphar/filepath-securejoin/pathrs-lite/procfs
Not Applicable x_refsource_misc
https://youtu.be/tGseJW_uBB8
Not Applicable x_refsource_misc
https://youtu.be/y1PaBzxwRWQ
Scores
CVSS v3
10.0
EPSS
0.0022
EPSS Percentile
12.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-61
CWE-363
Status
published
Products (2)
crates.io/youki
0 - 0.5.7crates.io
youki-dev/youki
< 0.5.7
Published
Nov 06, 2025
Tracked Since
Feb 18, 2026