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CWE

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CVE-2026-3407

Published: Mar 2, 2026

Modified: Mar 2, 2026

PUBLISHED

CVSS v3.1

3.3

LOW

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.

Vendor	Product	Versions
YosysHQ	yosys	affected `0.1` affected `0.2` affected `0.3` affected `0.4` affected `0.5` +57 more versions

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

References

VDB-348302 | YosysHQ yosys BLIF File rtlil.h set heap-based overflow

vdb-entry

technical-description

VDB-348302 | CTI Indicators (IOB, IOC, IOA)

signature

permissions-required

Submit #763755 | YosysHQ yosys 8bbde80 Heap-based Buffer Overflow

third-party-advisory

https://github.com/YosysHQ/yosys/issues/5677

issue-tracking

https://github.com/YosysHQ/yosys/pull/5680

issue-tracking

patch

https://github.com/oneafter/0210/blob/main/yo2/repro

exploit

https://github.com/YosysHQ/yosys/pull/5681

issue-tracking

patch

https://github.com/YosysHQ/yosys/

product

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