Bug 2555338 (CVE-2026-112036)

Summary: CVE-2026-112036 mupdf: mupdf: Denial of service via double-free in signature locking
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in MuPDF. A double-free memory vulnerability exists in the signature locking component when processing certain PDF documents. A remote attacker could exploit this flaw by enticing a user to open a specially crafted document, causing an application crash that results in a denial of service (DoS).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2558213    
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Description OSIDB Bzimport 2026-10-19 00:51:33 UTC
A vulnerability was detected in Artifex MuPDF up to 1.28.5. This impacts the function free_char_list of the file source/pdf/pdf-xref.c of the component Signature Locking. Performing a manipulation results in double free. The attack may be initiated remotely. The exploit is now public and may be used. The patch is named 3984925b660afb8a781ddf504021e91be1bc671e. To fix this issue, it is recommended to deploy a patch.