# CVE-2026-35215: firebird3.0: Firebird is an open-source relational database management system

CVE-2026-35215 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-35215, released May 15, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-35215
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0047
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 17, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | firebird3.0 Debian 14 | 3.0.14.ds7-1 | [DEBIAN-CVE-2026-35215](https://patchblox.com/security/data/fix/linux/debian-cve-2026-35215.md) | May 15, 2026 |
| Linux | firebird4.0 Debian 14 | 4.0.7.3271.ds6-1 | [DEBIAN-CVE-2026-35215](https://patchblox.com/security/data/fix/linux/debian-cve-2026-35215.md) | May 15, 2026 |

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Data as of 2026-11-10T07:50:38Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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