NULL pointer dereference in Firebirdsql Firebird
CVE-2026-28212
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.007 (54.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.007 · change: +0.002
Affected products
- Firebirdsql Firebird — versions < 3.0.14, >= 4.0.0, < 4.0.7, >= 5.0.0, < 5.0.4
Weakness classification (CWE)
References
- github.com/FirebirdSQL/firebird/security/advisories/GHSA-9884-9qm3-hqch (Exploit, Vendor Advisory)
- github.com/FirebirdSQL/firebird/releases/tag/v3.0.14 (Release Notes)
- github.com/FirebirdSQL/firebird/releases/tag/v4.0.7 (Release Notes)
- github.com/FirebirdSQL/firebird/releases/tag/v5.0.4 (Release Notes)
Frequently asked questions
- What is CVE-2026-28212?
- CVE-2026-28212 is a high-severity vulnerability in Firebirdsql Firebird, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-04-17.
- How severe is CVE-2026-28212?
- High severity. CVSS v3 base score is 7.5 out of 10.