NULL pointer dereference in Firebird - CVE-2026-28224
Published: April 20, 2026
Vulnerability identifier: #VU126554
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-28224
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: firebird.sourceforge.net
Affected software:
Firebird
Firebird
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to null pointer dereference in port_server_crypt_callback handling when processing an unauthenticated op_crypt_key_callback request. A remote attacker can send a specially crafted request to cause a denial of service.
The request can be sent without authorization.
How to mitigate CVE-2026-28224
Install security update from vendor's website.