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CVE-2026-28224

Firebird Null Pointer Dereference via CryptCallback causes DOS

Published: Apr 17, 2026Updated: Apr 24, 2026 Sources: CVE List NVD BDUCWE-476
8.2HIGH
NVD MITRE
EPSS Score
0.5%
Top 62.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when the server receives an op_crypt_key_callback packet without prior authentication, the port_server_crypt_callback handler is not initialized, resulting in a null pointer dereference and server crash. An unauthenticated attacker who knows only the server's IP and port can exploit this to crash the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:LA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:HAvailability
High
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Weaknesses

CWE-476

Affected Products

ООО «Ред Софт»
commercial·RUaka red soft
РЕД ОСOn-premOS
Operating Systems / linux-distro
Ред База ДанныхOn-premDatabase
Databases / relational
FirebirdSQL
oss-projectaka firebird
firebirdOn-prem
Databases / relational
Firebird Foundation Inc.
oss-projectaka firebird
FirebirdOn-prem
Databases / relational
and 1 more affected products View all →

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Impact
Initial Access
View detailed technique mapping

References

https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-xrcw-wpjx-pr95
github.com
https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14
github.com
https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7
github.com
and 3 more references View all →

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