Bug 2467180 (CVE-2026-6210)

Summary: CVE-2026-6210 Qt SVG: Qt SVG: Denial of Service via crafted SVG image
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: jmitchel, kshier, rhel-process-autobot, teagle, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in Qt SVG. A remote attacker could exploit a vulnerability by providing a specially crafted SVG image. This issue arises from incorrect handling of SVG marker references, where the software misinterprets data types, leading to memory access errors and an infinite loop. This can cause the application to crash, resulting in a denial of service (DoS).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2477889, 2477891, 2477890    
Bug Blocks:    

Description OSIDB Bzimport 2026-05-06 13:09:01 UTC 
A type confusion vulnerability in Qt SVG allows an attacker to cause an application crash via a crafted SVG image.



When processing SVG marker references, the renderer retrieves a node by its id attribute and casts it to QSvgMarker* without verifying the node type. A non-marker element (such as a <line> element) that references itself as a marker triggers an out-of-bounds heap read due to the object size difference between QSvgLine and QSvgMarker,
 followed by an endless recursion that bypasses the marker recursion 
guard through incorrect virtual dispatch. The result is an application 
crash (denial of service).



This issue affects Qt SVG: 
from 6.7.0 before 6.8.8, from 6.9.0 before 6.11.1.