CVE-2026-28212

Firebird has potential server crash via null pointer dereference when processing op_slice packet

State: Published
Severity: 7.5 High
Published: Apr 17, 2026
Updated: Apr 20, 2026
Reserved: Feb 25, 2026

Description

Firebird is an open-source relational database management system. In versions prior to 6.0.0, 5.0.4, 4.0.7 and 3.0.14, when processing an op_slice network packet, the server passes an unprepared structure containing a null pointer to the SDL_info() function, resulting in a null pointer dereference and server crash. An unauthenticated attacker can trigger this by sending a crafted packet to the server port. This issue has been fixed in versions 6.0.0, 5.0.4, 4.0.7 and 3.0.14.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	GitHub_M

Weaknesses

CWE-476 NULL Pointer Dereference

Affected Products

Product	Versions
firebirdFirebirdSQL	< 3.0.14Affected >= 4.0.0, < 4.0.7Affected >= 5.0.0, < 5.0.4Affected

References

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