Bug 2537936 (CVE-2026-63274)

Summary: CVE-2026-63274 libreoffice: heap buffer overflow in PDF import stream handling
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: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in LibreOffice. When a user imports a specially crafted PDF document with LibreOffice Draw, a heap-based buffer overflow can occur due to improper validation of the stream length. This issue can cause memory corruption, resulting in an application crash.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2540063    
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Description OSIDB Bzimport 2026-09-22 16:14:12 UTC 
LibreOffice Draw can import PDF documents. A heap buffer overflow existed when importing a stream object. The length of the stream was taken from the object's own dictionary and was not checked against the number of bytes actually present, so copying the stream read and wrote past the end of the buffer holding it. In fixed versions the declared length is clamped to the bytes actually read.
Comment 2 Jon Orris 2026-10-13 06:05:46 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:82013 https://access.redhat.com/errata/RHSA-2026:82013