UBUNTU-CVE-2026-116723 (CVE-2026-116723)
Vulnerability from osv_ubuntu – Published: 2026-11-03 00:00 – Updated: 2026-11-03 00:00 – Source website
VLAI
Details
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.
Severity
7.8 (High)
N/A (UNKNOWN)
References
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"package": {
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],
"aliases": [],
"details": "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.",
"id": "UBUNTU-CVE-2026-116723",
"modified": "2026-11-03T00:00:00Z",
"published": "2026-11-03T00:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-116723"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-116723"
},
{
"type": "REPORT",
"url": "https://github.com/fltk/fltk/issues/1632"
},
{
"type": "REPORT",
"url": "https://github.com/fltk/fltk/commit/3a049d8262dc759cf9737339420e8457e24c0cb1"
},
{
"type": "REPORT",
"url": "https://github.com/fltk/fltk"
},
{
"type": "REPORT",
"url": "https://github.com/fltk/fltk/blob/release-1.4.5/src/Fl_BMP_Image.cxx#L255-L265"
},
{
"type": "REPORT",
"url": "https://hackmd.io/@haindpwn/fltk-bmp-image-stack-heap-overflow"
},
{
"type": "REPORT",
"url": "https://www.vulncheck.com/advisories/fltk-through-1.4.5-stack-buffer-overflow-via-fl-bmp-image-colors-used-field"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-116723"
]
}
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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