CVE-2025-62596

Container escape via raced procfs write redirection

Published Nov 5, 2025 · Updated Nov 5, 2025

Symlink race conditions in Youki youki before 0.5.7 allow local users to escape containers or interrupt the host service. The AppArmor label writer checks only that the resolved destination remains under procfs, while component-by-component lookup permits a shared-mount substitution to redirect the write. Exploitation requires low-privileged local access, AppArmor use, and winning the mount race; redirected writes can modify host procfs state.

CVSS severity7.3
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Symlink race conditions in Youki youki before 0.5.7 allow local users to escape containers or interrupt the host service. The AppArmor label writer checks only that the resolved destination remains under procfs, while component-by-component lookup permits a shared-mount substitution to redirect the write. Exploitation requires low-privileged local access, AppArmor use, and winning the mount race; redirected writes can modify host procfs state.

The record

CVE
CVE-2025-62596
Published
Nov 5, 2025
Updated
Nov 5, 2025
Vendor
Youki
Product
youki
Classifications
CWE-61, CWE-363, T1611
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 5, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.5.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Youki · youkiversion=< 0.5.7

Published CVSS scores

7.3GitHub, Inc.CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
10.0NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-61UNIX Symbolic Link (Symlink) Following
CWE-363Race Condition Enabling Link Following
T1611Escape to Host

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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