Bug 2548222 (CVE-2026-107705)

Summary: CVE-2026-107705 poppler: poppler: Denial of Service via stack-based buffer overflow in PDF decryption
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Poppler. A stack-based buffer overflow vulnerability exists in the decryption routine when processing encrypted PDF documents. By providing an overly long password during document decryption, an attacker can overwrite memory buffers. This issue primarily leads to a Denial of Service (DoS) through application crashes, or potential memory corruption.
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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: 2548445, 2548446    
Bug Blocks:    

Description OSIDB Bzimport 2026-10-08 20:01:54 UTC
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.