Bug 2487766 (CVE-2026-46521)

Summary: CVE-2026-46521 ImageMagick: ImageMagick: Denial of Service via out-of-bounds write in LZMA MIFF encoder
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 ImageMagick. When processing an image with LZMA compression in the MIFF encoder, a missing check can lead to an out-of-bounds write. This vulnerability could allow an attacker to cause a denial of service (DoS) by providing a specially crafted image file, leading to application instability or crashes.
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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: 2487887, 2487888    
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Description OSIDB Bzimport 2026-06-10 23:02:04 UTC
ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 6.9.13-48 and 7.1.2-23, when using LZMA compression in the MIFF encoder an out of bounds write can occur due to a missing check. This issue has been patched in versions 6.9.13-48 and 7.1.2-23.