Bug 2558570 (CVE-2026-96644) - CVE-2026-96644 pillow: Pillow: Denial of Service via out-of-bounds read in metafile parser
Summary: CVE-2026-96644 pillow: Pillow: Denial of Service via out-of-bounds read in me...
Keywords:
Status: NEW
Alias: CVE-2026-96644
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-21 21:11 UTC by OSIDB Bzimport
Modified: 2026-10-31 08:31 UTC (History)
59 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-10-21 21:11:16 UTC 
Pillow is a Python imaging library. Prior to 13.0.0 on Windows, src/PIL/WmfImagePlugin.py passes unchecked 32-bit WMF or EMF dimensions to the native drawwmf handler in src/display.c. The handler sizes a DIB allocation from 16-bit-truncated bcWidth and bcHeight fields but copies pixel data using the original full dimensions. A crafted wide, short metafile can pass the pixel-count decompression-bomb check and make the Windows-only renderer read beyond the heap buffer, potentially disclosing memory or crashing the process. This issue is fixed in version 13.0.0.
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