CVE-2016-6830: Call-Cc Chicken

Critical severity, CVSS 9.8. EPSS: 2.2% chance of exploitation in the next 30 days.

The "process-execute" and "process-spawn" procedures in CHICKEN Scheme used fixed-size buffers for holding the arguments and environment variables to use in its execve() call. This would allow user-supplied argument/environment variable lists to trigger a buffer overrun. This affects all releases of CHICKEN up to and including 4.11 (it will be fixed in 4.12 and 5.0, which are not yet released).

Affected products

• Call-Cc Chicken: up to and including 4.11.0

Published 2017-01-10. Last modified 2026-06-17.