CVE-2025-54989 Firebird XDR Message Parsing NULL Pointer Dereference Denial-of-Service Vulnerability

Medium 5.3 Published 15 Aug 2025 Updated 3 Nov 2025

A remote attacker can cause a denial of service in Firebird database servers by sending a specially crafted XDR message that triggers a NULL pointer dereference.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2025-54989?

CVE-2025-54989 is a medium-severity vulnerability in FirebirdSQL firebird, published on 15 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Firebird is a relational database. Prior to versions 3.0.13, 4.0.6, and 5.0.3, there is an XDR message parsing NULL pointer dereference denial-of-service vulnerability in Firebird. This specific flaw exists within the parsing of xdr message from client. It leads to NULL pointer dereference and DoS. This issue has been patched in versions 3.0.13, 4.0.6, and 5.0.3.

Weakness: CWE-476

Which versions are affected by CVE-2025-54989?

It affects 1 product.

Linux distribution packages (3)

`firebird` SUSE:Linux Enterprise Module for Package Hub 15 SP6	All versions	`3.0.4.33054-150200.3.3.1`
`firebird` SUSE:Linux Enterprise Module for Package Hub 15 SP7	All versions	`3.0.4.33054-150200.3.3.1`
`firebird` openSUSE:Leap 15.6	All versions	`3.0.4.33054-150200.3.3.1`

Products include Firebirdsql Firebird.

How do I fix CVE-2025-54989?

Upgrade to a fixed version.

Is CVE-2025-54989 being exploited?

There is no known exploitation of CVE-2025-54989 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2025-54989, DLA-4282-1, GHSA-7qp6-hqxj-pjjp, SUSE-SU-2025:02991-1, UBUNTU-CVE-2025-54989.