CVE-2026-128991
xschem 2.9.9 through 3.4.7 Out-of-Bounds Read via read_xschem_file() Embedded-Symbol Record
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
xschem 2.9.9 through 3.4.7 contains an out-of-bounds read vulnerability in read_xschem_file() in src/save.c that mishandles embedded-symbol records lacking a preceding instance. Attackers can supply a crafted schematic beginning with a "[" record, causing xschem to read and dereference memory below the instance array and crash.
| CWE | CWE-125 |
| Vendor | stefan schippers |
| Product | xschem |
| Published | Nov 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High
Affected Versions
Stefan Schippers / xschem
2.9.9 ≤ 3.4.7
References
github.com: https://github.com/StefanSchippers/xschem/commit/e29af39c6133c36bdaf66603fd663231e75517f1 github.com: https://github.com/StefanSchippers/xschem/blob/3.4.7/src/save.c#L3138-L3141 github.com: https://github.com/StefanSchippers/xschem vulncheck.com: https://www.vulncheck.com/advisories/xschem-2.9.9-through-3.4.7-out-of-bounds-read-via-read-xschem-file-embedded-symbol-record
Credits
Deus Rex