What’s Vulnerable › Vulnerabilities

CVE-2025-27612: Libcontainer is affected by capabilities elevation

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-03-21 · updated 2026-06-17
• Weakness: CWE-276

Description

libcontainer is a library for container control. Prior to libcontainer 0.5.3, while creating a tenant container, the tenant builder accepts a list of capabilities to be added in the spec of tenant container. The logic here adds the given capabilities to all capabilities of main container if present in spec, otherwise simply set provided capabilities as capabilities of the tenant container. However, setting inherited caps in any case for tenant container can lead to elevation of capabilities, similar to CVE-2022-29162. This does not affect youki binary itself. This is only applicable if you are using libcontainer directly and using the tenant builder.

Affected products

• youki-dev youki: before 0.5.3

References

• https://github.com/opencontainers/runc/security/advisories/GHSA-f3fp-gc8g-vw66
• https://github.com/youki-dev/youki/blob/9e63fa4da1672a78ca45100f3059a732784a5174/crates/libcontainer/src/container/tenant_builder.rs#L408
• https://github.com/youki-dev/youki/commit/747e342d2026fbf3a395db3e2a491ebef00082f1
• https://github.com/youki-dev/youki/security/advisories/GHSA-5w4j-f78p-4wh9

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