Bug 2548446

Summary: CVE-2026-107705 poppler: poppler: Denial of Service via stack-based buffer overflow in PDF decryption [fedora-all]
Product: [Fedora] Fedora Reporter: Laura Pardo <lpardo>
Component: popplerAssignee: Marek Kašík <mkasik>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: feborges, gnome-sig, mclasen, mkasik, rstrode
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["a3ea417d-18f6-467d-953c-540aa0f5f95a"]}
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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:    
Bug Blocks: 2548222    

Description Laura Pardo 2026-10-09 09:49:14 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.

Poppler 0.42.0 through 26.10.0 contains a stack-based buffer overflow in Decrypt::revision6Hash() that allows attackers controlling the password to overwrite stack memory when opening AESV3/R6 encrypted PDFs. Attackers can supply a password longer than 127 bytes through applications using the libpoppler, libpoppler-glib or C++ API to overflow the K1 and E buffers, crashing the process or corrupting memory.