CVE-2026-107736: CWE-121: Stack-based Buffer Overflow in sumatrapdfreader sumatrapdf
Description
SumatraPDF is a multi-format reader for Windows. In 3.6.1 and earlier, MaybeFlipBitmap() asks GDI+ to read the attacker-controlled PropertyTagOrientation size through GetPropertyItem() while supplying only a fixed 64-byte buf on the stack. Opening a crafted TIFF with enough EXIF Orientation values can cause attacker-selected bytes to overwrite stack control data, while tested builds terminate through the stack cookie check. No broader impact is claimed beyond the advisory-supported conditions. No fixed version is available as of this review.
CVSS v4.0
Score 6.8medium
Affected software
sumatrapdfreader
sumatrapdf
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-10-08T17:21:52.977Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ac81de02cdf04f6563fadfe
Added to database: 10/08/2026, 22:49:04 UTC
Last updated: 10/08/2026, 22:49:04 UTC
Views: 1
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