CVE-2026-35215
An unauthenticated attacker can exploit this by sending a crafted slice packet to crash the server.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.47%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the sdl_desc() function does not validate the length of a decoded SDL descriptor from a slice packet. A zero-length descriptor is later used to calculate the number of slice items, causing a division by zero. An unauthenticated attacker can exploit this by sending a crafted slice packet to crash the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.47% probability · 39th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-369
- Affected
- firebirdsql/firebird
- Source
- security-advisories@github.com
References
- https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14Release Notes
- https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7Release Notes
- https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4Release Notes
- https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-g99w-prq5-29c6Exploit, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.