Buffer overflow in Yosyshq Yosys

CVE-2026-3407

A vulnerability was determined in YosysHQ yosys up to 0.62. This affects the function Yosys::RTLIL::Const::set of the file kernel/rtlil.h of the component BLIF File Parser. This manipulation causes heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. Applying a patch is the recommended action to fix this issue. It appears that the issue is not reproducible all the time.

Vulnerability class: Buffer Overflow

EPSS: 0.001 (2.7th percentile) — read the EPSS interpretation.