Answer in brief
CVE-2026-128990 records a High severity (CVSS 8.5) vulnerability in xschem 2.9.9 through 3.4.7 Heap Out-of-Bounds Write via rawtovcd read_dataset(). The current sources do not mark it as known exploited. The current feed maps Stefan Schippers/xschem (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Stefan Schippers/xschem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Stefan Schippers/xschemgeneric | >=2.9.9 <=3.4.7 | Not reported |
Published upstream
Nov 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 13, 2026
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.
Quoted source text, attributed separately from HOL analysis.