Bug 2397667 (CVE-2025-55780)
| Summary: | CVE-2025-55780 mupdf: MuPDF null pointer dereference | ||
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| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security DevOps Team <prodsec-dev> |
| Status: | NEW --- | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | mjg |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A null pointer dereference occurs in the function break_word_for_overflow_wrap() in MuPDF when rendering a malformed EPUB document. Specifically, the function calls fz_html_split_flow() to split a FLOW_WORD node, but does not check if node->next is valid before accessing node->next->overflow_wrap, resulting in a crash if the split fails or returns a partial node chain.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 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: | 2397700, 2397701, 2397702, 2397703 | ||
| Bug Blocks: | |||
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Description
OSIDB Bzimport
2025-09-23 19:01:18 UTC
https://bugs.ghostscript.com/show_bug.cgi?id=708720 So, this is fixed in upstream/master (1.27.x). I'm backporting the fix to 1.26.9 which is the version coming to f44+f43 currently, and I'll have to see about released branches (backport further or update). Note that I cannot verify the fix as the reproducer in the upstream bug is private. I'll go by upstream's verdict on this. |