No they have not been. There were at least 16 container escapes last year - at least 8 of them were at the runtime layer.

I personally spent way too much time looking at this in the past month:

https://nanovms.com/blog/last-year-in-container-security

runc: https://www.cve.org/CVERecord?id=CVE-2025-31133

nvidia: https://www.cve.org/CVERecord?id=CVE-2025-23266

runc: https://www.cve.org/CVERecord?id=CVE-2025-52565

youki: https://www.cve.org/CVERecord?id=CVE-2025-54867

Also, last time I checked podman uses runc by default.