Bug 2538152 (CVE-2026-63279)

Summary: CVE-2026-63279 libreoffice: LibreOffice: Information disclosure and denial of service via out-of-bounds read in PICT image import
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: 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 importing a specially crafted PICT image embedded in a document, an out-of-bounds read vulnerability exists. This occurs because the palette index in the image data is not validated against the actual size of the color palette. A remote attacker could exploit this to read memory outside the intended buffer, potentially leading to information disclosure or a denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-09-22 17:18:53 UTC 
LibreOffice can import PICT images, which may be embedded in documents. An out of bounds read existed when importing an image that uses a colour palette. The palette index held in the image data was used without being checked against the number of entries the palette has, so an index past the last entry read memory outside the palette. In fixed versions the palette index is limited to the entries present.