Bug 2563620 (CVE-2026-9535)

Summary: CVE-2026-9535 vtk: vtk: Denial of Service via out-of-bounds read in vtkChacoReader
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: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in VTK. An out-of-bounds read vulnerability in the vtkChacoReader component occurs when processing graph data. By supplying a specially crafted Chaco file, an attacker can trigger an application crash, resulting in a Denial of Service (DoS), or potentially expose sensitive memory contents.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2567125, 2567126, 2567127, 2567128, 2567129, 2567130, 2567131, 2567132, 2567270    
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Description OSIDB Bzimport 2026-10-29 18:33:33 UTC 
A out-of-bounds read vulnerability exists in the vtkChacoReader InputGraph2 functionality of vtk (version(s): 9.6.1). A specially crafted chaco can lead to an out-of-bounds read. An attacker can provide a malicious file to trigger this vulnerability.