PT-2026-22538 · Yosyshq · Yosys

Oneafter · Published 2026-03-02 · Updated 2026-03-02 · CVE-2026-3407

Positive Technologies (AI Summary)

CVSS v3.1

3.3

Low

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Name of the Vulnerable Software and Affected Versions YosysHQ yosys versions prior to 0.63

Description A heap-based buffer overflow exists in YosysHQ yosys due to a flaw in the BLIF File Parser component, specifically within the Yosys::RTLIL::Const::set function located in the kernel/rtlil.h file. This manipulation can be triggered on a local host. The exploit has been publicly disclosed.

Recommendations Apply a patch to address this issue.

Exploit

Fix

Heap Based Buffer Overflow

Buffer Overflow

Weakness Enumeration

CWE-122

CWE-119

Related Identifiers

CVE-2026-3407

Affected Products

Yosys

References · 14

• 🔥 https://github.com/oneafter/0210/blob/main/yo2/repro · Exploit
• https://github.com/YosysHQ/yosys/pull/5680 · Patch
• https://github.com/YosysHQ/yosys/pull/5681 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-3407 · Security Note
• https://osv.dev/vulnerability/CVE-2026-3407 · Vendor Advisory
• https://github.com/YosysHQ/yosys/issues/5677 · Note
• https://t.me/cveNotify/153689 · Telegram Post
• https://github.com/YosysHQ/yosys · Note
• https://twitter.com/cyberbivash/status/2028338041534734846 · Twitter Post
• https://t.me/CVEtracker/46079 · Telegram Post
• https://twitter.com/VulmonFeeds/status/2028314874296578384 · Twitter Post
• https://vuldb.com/?ctiid.348302 · Note
• https://vuldb.com/?id.348302 · Note
• https://vuldb.com/?submit.763755 · Note