Bug 2397701

Summary: CVE-2025-55780 mupdf: MuPDF null pointer dereference [epel-9]
Product: [Fedora] Fedora EPEL Reporter: Jon Moroney <jmoroney>
Component: mupdfAssignee: Michael J Gruber <mjg>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: epel9CC: lizhenbo, mjg
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["c7df55b5-c011-469e-9f0e-66d0cdc5f70c"]}
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2025-09-25 13:54:20 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2397667    

Description Jon Moroney 2025-09-23 20:57:56 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

The following link provides references to all essential vulnerability management information. If something is wrong or missing, please contact a member of PSIRT.
https://spaces.redhat.com/display/PRODSEC/Vulnerability+Management+-+Essential+Documents+for+Engineering+Teams
Comment 1 Michael J Gruber 2025-09-25 13:54:20 UTC 
Since the reproducer is private, it is not clear whether EPEL 9 is affected.

EPEL 9 carries mupdf 1.21.1. The relevant codepaths (which the fix touches) appear to be introduced by
9cb176d87 ("Simplify overflow-wrap: break-word handling.", 2023-03-24) which is in 1.22.0 and later. I therefore conclude that EPEL 9 ist most probably not affected (NOTABUG), and not fixable anyways (unless by a version jump, CANTFIX).