Incorrect calculation in Firebird - CVE-2025-65104
Published: April 20, 2026
Vulnerability identifier: #VU126558
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-65104
CWE-ID: CWE-682
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: firebird.sourceforge.net
Affected software:
Firebird
Firebird
Detailed vulnerability description
The vulnerability allows a local user to disclose sensitive information and modify data.
The vulnerability exists due to improper data length handling in XSQLDA fields when processing responses from a Firebird 4 or higher server. A local user can use the firebird3 client with a newer server to disclose sensitive information and modify data.
The issue occurs when the firebird3 client is used with a Firebird 4 or higher server.
How to mitigate CVE-2025-65104
Install security update from vendor's website.