Bug 2459280 (CVE-2026-35215)

Summary: CVE-2026-35215 Firebird: Firebird: Denial of Service via crafted slice packet causing division by zero
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Firebird. In the `sdl_desc()` function, a division by zero vulnerability exists due to improper validation of the length of a decoded SDL descriptor from a slice packet. An unauthenticated attacker can exploit this by sending a specially crafted slice packet, leading to a server crash and resulting in a Denial of Service (DoS).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2459713, 2459714, 2459715, 2459716    
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Description OSIDB Bzimport 2026-04-17 20:02:05 UTC
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.