Bug 2463367 (CVE-2026-7233)

Summary: CVE-2026-7233 mupdf: Artifex MuPDF: Information disclosure due to out-of-bounds read
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: mjg
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Artifex MuPDF, specifically within its CFF Index Handler component. A local user could exploit an out-of-bounds read vulnerability in the `fz_subset_cff_for_gids` function. This could allow an attacker to read sensitive information from memory, potentially leading to information disclosure.
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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: 2463401, 2463402    
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Description OSIDB Bzimport 2026-04-28 07:01:57 UTC 
A vulnerability was determined in Artifex MuPDF up to 1.28.0. The impacted element is the function fz_subset_cff_for_gids of the file subset-cff.c of the component CFF Index Handler. This manipulation causes out-of-bounds read. The attack can only be executed locally. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through a bug report but has not responded yet.
Comment 2 Michael J Gruber 2026-04-28 13:11:56 UTC 
This is the upstream bug:

https://bugs.ghostscript.com/show_bug.cgi?id=709328