CVE-2026-28212

HIGH

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

Title source: cna

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.

References (4)

[X_Refsource_Confirm] https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-9884-9qm3-hqch

[X_Refsource_Misc] https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14

[X_Refsource_Misc] https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7

[X_Refsource_Misc] https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4

Scores

CVSS v3 7.5

EPSS 0.0007

EPSS Percentile 20.1%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact partial

Details

CWE

CWE-476

Status published

Products (4)

firebirdsql/firebird < 3.0.14

FirebirdSQL/firebird < 3.0.14

FirebirdSQL/firebird >= 4.0.0, < 4.0.7

FirebirdSQL/firebird >= 5.0.0, < 5.0.4

Published Apr 17, 2026

Tracked Since Apr 18, 2026