CVE-2026-3407
YosysHQ yosys BLIF File rtlil.h set heap-based overflow
- State
- Published
- Severity
- 4.8 Medium
- Published
- Mar 2, 2026
- Updated
- Mar 2, 2026
- Reserved
- Mar 1, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 4.8 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 3.3 Low | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C | VulDB |
| 3.0 | 3.3 Low | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C | VulDB |
| 2.0 | 1.7 Low | AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
yosysYosysHQ |
|
References
- VDB-348302 | YosysHQ yosys BLIF File rtlil.h set heap-based overflowvdb-entrytechnical-description
- VDB-348302 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- Submit #763755 | YosysHQ yosys 8bbde80 Heap-based Buffer Overflowthird-party-advisory
- https://github.com/YosysHQ/yosys/issues/5677issue-tracking
- https://github.com/YosysHQ/yosys/pull/5680issue-trackingpatch
- https://github.com/oneafter/0210/blob/main/yo2/reproexploit
- https://github.com/YosysHQ/yosys/pull/5681issue-trackingpatch
- https://github.com/YosysHQ/yosys/product
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