CVE-2026-128990

Description

xschem 2.9.9 through 3.4.7 contains a heap out-of-bounds write vulnerability in read_dataset() in src/rawtovcd.c due to an unchecked variable index. Attackers can supply a crafted ngspice .raw file that, when converted with rawtovcd, writes file-controlled heap pointers at chosen signed offsets, corrupting heap memory.

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

• 8.5CVSS 4.0, Highfrom the CNA (VulnCheck)CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
• 7.8CVSS 3.1, Highfrom the CNA (VulnCheck)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

No explicit remediation statement is available on this page yet. Consult the original record and vendor references before choosing a fix.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

Timeline

1. 13 Nov 2026 Published

Weakness

• CWE-787

References

• github.compatch
• github.comtechnical-description
• github.comproduct
• VulnCheck Advisory: xschem 2.9.9 through 3.4.7 Heap Out-of-Bounds Write via rawtovcd read_dataset()third-party-advisory