Bug 2497683 - CVE-2026-54059 python-pillow: Pillow: Denial of Service via crafted PCF font data [epel-all]
Summary: CVE-2026-54059 python-pillow: Pillow: Denial of Service via crafted PCF font ...
Keywords:
Status: NEW
Alias: None
Product: Fedora EPEL
Classification: Fedora
Component: python-pillow
Version: epel10
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Sandro Mani
QA Contact:
URL:
Whiteboard: {"flaws": ["f1e70f39-e002-48d5-9b31-d...
Depends On:
Blocks: CVE-2026-54059
TreeView+ depends on / blocked
 
Reported: 2026-07-07 11:43 UTC by jkelly
Modified: 2026-07-07 11:43 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:

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Description jkelly 2026-07-07 11:43:15 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.

Pillow is a Python imaging library. Prior to 12.3.0, PIL/PcfFontFile.py _load_bitmaps() read glyph dimensions from the PCF METRICS section and passed them directly to Image.frombytes() without calling Image._decompression_bomb_check(), allowing crafted PCF font data to cause excessive memory allocation. This issue is fixed in version 12.3.0.
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