An out-of-bounds read vulnerability exists in the schema lexer of flatcc 4c3b999e. When an exact-length FlatBuffers schema buffer ends with a digit, the integer digit-scan loop in lex() advances past the end of the input buffer and dereferences the out-of-bounds pointer. A specially crafted schema can trigger a one-byte heap buffer over-read, resulting in application crash and denial of service.
History

Wed, 23 Sep 2026 19:30:00 +0000

Type Values Removed Values Added
Title Out-of-bounds Read in flatcc Schema Lexer Causes Application Crash and Denial of Service

Wed, 23 Sep 2026 17:15:00 +0000

Type Values Removed Values Added
Title Out-of-Bounds Read in FlatBuffers Schema Lexer Causing Denial of Service
Weaknesses CWE-125

Wed, 23 Sep 2026 13:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-22
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 22 Sep 2026 20:45:00 +0000

Type Values Removed Values Added
Title Out-of-Bounds Read in FlatBuffers Schema Lexer Causing Denial of Service
First Time appeared Dvidelabs
Dvidelabs flatcc
Weaknesses CWE-125
Vendors & Products Dvidelabs
Dvidelabs flatcc

Tue, 22 Sep 2026 19:45:00 +0000

Type Values Removed Values Added
Description An out-of-bounds read vulnerability exists in the schema lexer of flatcc 4c3b999e. When an exact-length FlatBuffers schema buffer ends with a digit, the integer digit-scan loop in lex() advances past the end of the input buffer and dereferences the out-of-bounds pointer. A specially crafted schema can trigger a one-byte heap buffer over-read, resulting in application crash and denial of service.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-09-22T00:00:00.000Z

Updated: 2026-09-23T12:01:25.265Z

Reserved: 2026-09-10T00:00:00.000Z

Link: CVE-2026-88344

cve-icon Vulnrichment

Updated: 2026-09-23T12:00:49.320Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-22T20:17:10.493

Modified: 2026-09-24T21:16:28.120

Link: CVE-2026-88344

cve-icon Redhat

No data.