Summary
Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2026-116724: FLTK through 1.4.5 contains an integer overflow vulnerability in Fl_BMP_Image::load_bmp_() that causes undersized pixel buffer allocation from file-supplied width and height. Attackers can supply a crafted BMP or ICO file with large dimensions so row decoding writes file-derived data past the heap buffer, corrupting the application heap. CVE-2026-116723: FLTK through 1.4.5 contains a stack-based buffer overflow vulnerability in Fl_BMP_Image::load_bmp_() that allows attackers to corrupt stack memory by supplying an oversized BMP colors_used field. Attackers can craft BMP or ICO files with colors_used above 256 to overflow the 768-byte colormap array, causing crashes or potential code execution.
Fixed packages 5
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2 | fltk | 0:1.3.4-1.amzn2.0.3 |
| Amazon Linux · 2 | fltk-debuginfo | 0:1.3.4-1.amzn2.0.3 |
| Amazon Linux · 2 | fltk-devel | 0:1.3.4-1.amzn2.0.3 |
| Amazon Linux · 2 | fltk-fluid | 0:1.3.4-1.amzn2.0.3 |
| Amazon Linux · 2 | fltk-static | 0:1.3.4-1.amzn2.0.3 |
Vulnerabilities 2
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High 7.8
FLTK through 1.4.5 Stack Buffer Overflow via Fl_BMP_Image colors_used Field
FLTK through 1.4.5 contains a stack-based buffer overflow vulnerability in Fl_BMP_Image::load_bmp_() that allows attackers to corrupt stack memory by supplying an oversized BMP colors_used field. Attackers can craft BMP or ICO files with colors_used above 256…
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High 7.8
FLTK through 1.4.5 Heap Buffer Overflow via Fl_BMP_Image Integer Overflow
FLTK through 1.4.5 contains an integer overflow vulnerability in Fl_BMP_Image::load_bmp_() that causes undersized pixel buffer allocation from file-supplied width and height. Attackers can supply a crafted BMP or ICO file with large dimensions so row decoding…