Description
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.
Published: 2026-11-13
Score: 5.8 Medium
EPSS: n/a
KEV: No
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History

Fri, 13 Nov 2026 15:15:00 +0000

Type Values Removed Values Added
Description 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.
Title xschem 2.9.9 through 3.4.7 Out-of-Bounds Read via read_xschem_file() Embedded-Symbol Record
Weaknesses CWE-125
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H'}

cvssV4_0

{'score': 5.8, 'vector': 'CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N'}

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-13T15:01:41.369Z

Reserved: 2026-11-13T14:31:49.944Z

Link: CVE-2026-128991

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-13T15:17:45.360

Modified: 2026-11-13T15:17:45.360

Link: CVE-2026-128991

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses