CVE-2025-54867: Youki is a container runtime written in Rust

Q: How do I fix CVE-2025-54867?

youki: upgrade to 0.5.5. Exact commands for each OS are on this page.

Q: Is CVE-2025-54867 being exploited?

CVE-2025-54867 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-54867 affect?

CVE-2025-54867 affects youki. Severity is high (CVSS 7.0). Youki is a container runtime written in Rust. Prior to version 0.5.5, if /proc and /sys in the rootfs are symbolic links, they can potentially be exploited to gain access to the host root filesystem. This issue has been patched in version 0

Routine

HIGH 7.0UPGRADE

CVE-2025-54867 is a high-severity flaw (CVSS 7.0) affecting youki. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Youki is a container runtime written in Rust. Prior to version 0.5.5, if /proc and /sys in the rootfs are symbolic links, they can potentially be exploited to gain access to the host root filesystem. This issue has been patched in version 0.5.5.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.0 (High)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-61
Published	2025-08-14
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: youki-dev

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-08-14 16:15 UTCPublished CVE record published
2026-06-17 09:40 UTCUpdated Record last modified

youki-dev youki UPGRADE

Affected: < 0.5.5

Fixed in: 0.5.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy youki || rpm -q youki || youki --version

2. UPGRADE to 0.5.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade youki

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade youki

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-54867?

youki: upgrade to 0.5.5. Exact commands for each OS are on this page.

Is CVE-2025-54867 being exploited?

CVE-2025-54867 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-54867 affect?

CVE-2025-54867 affects youki. Severity is high (CVSS 7.0). Youki is a container runtime written in Rust. Prior to version 0.5.5, if /proc and /sys in the rootfs are symbolic links, they can potentially be exploited to gain access to the host root filesystem. This issue has been patched in version 0

How urgent is CVE-2025-54867?

Priority 26/100. High severity

Related CVEs

CVE-2025-62596 CRITICAL 10.0 UPGRADE Youki is a container runtime written in Rust
CVE-2025-62161 CRITICAL 10.0 UPGRADE Youki is a container runtime written in Rust

References

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