Bug 2417171 (CVE-2025-66019) - CVE-2025-66019 pypdf: pypdf manipulated LZWDecode streams can exhaust RAM
Summary: CVE-2025-66019 pypdf: pypdf manipulated LZWDecode streams can exhaust RAM
Keywords:
Status: NEW
Alias: CVE-2025-66019
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-11-26 00:01 UTC by OSIDB Bzimport
Modified: 2025-12-02 18:49 UTC (History)
37 users (show)

Fixed In Version:
Clone Of:
Environment:
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Description OSIDB Bzimport 2025-11-26 00:01:40 UTC 
pypdf is a free and open-source pure-python PDF library. Prior to version 6.4.0, an attacker who uses this vulnerability can craft a PDF which leads to a memory usage of up to 1 GB per stream. This requires parsing the content stream of a page using the LZWDecode filter. This issue has been patched in version 6.4.0.
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