CVE-2025-24965: .krun_config.json symlink attack creates or overwrites file on the host in crun

Severity: high (CVSS 8.5 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-02-19 · updated 2026-06-17
Weakness: CWE-22

Description

crun is an open source OCI Container Runtime fully written in C. In affected versions A malicious container image could trick the krun handler into escaping the root filesystem, allowing file creation or modification on the host. No special permissions are needed, only the ability for the current user to write to the target file. The problem is fixed in crun 1.20 and all users are advised to upgrade. There are no known workarounds for this vulnerability.

Affected products

containers crun: before 1.20

References

https://github.com/containers/crun/commit/0aec82c2b686f0b1793deed43b46524fe2e8b5a7
https://github.com/containers/crun/releases/tag/1.20
https://github.com/containers/crun/security/advisories/GHSA-f42g-r5jj-qh4j

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