Detections
Analytics
Amazon Linux 2023 : fltk, fltk-devel, fltk-fluid (ALAS2023-2026-3459)
high Nessus Plugin ID 379882
Synopsis
The remote Amazon Linux 2023 host is missing a security update.Description
It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-3459 advisory.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. (CVE-2026-116723)
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-2026-116724)
Tenable has extracted the preceding description block directly from the tested product security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Run 'dnf update fltk --releasever 2023.12.20261112' or or 'dnf update --advisory ALAS2023-2026-3459 --releasever 2023.12.20261112' to update your system.See Also
https://alas.aws.amazon.com//AL2023/ALAS2023-2026-3459.html
https://alas.aws.amazon.com/faqs.html
Plugin Details
Severity: High
ID: 379882
File Name: al2023_ALAS2023-2026-3459.nasl
Version: 1.1
Type: Local
Agent: unix
Published: 11/12/2026
Updated: 11/12/2026
Supported Sensors: Nessus Agent, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.9
Percentile: 58.51
CVSS v2
Risk Factor: High
Base Score: 7.2
Temporal Score: 5.3
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2026-116724
CVSS v3
Risk Factor: High
Base Score: 7.8
Temporal Score: 6.8
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: High
Base Score: 8.5
Threat Score: 5.9
Threat Vector: CVSS:4.0/E:U
Vector: 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
Vulnerability Information
CPE: cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:fltk-debuginfo, p-cpe:/a:amazon:linux:fltk-debugsource, p-cpe:/a:amazon:linux:fltk-devel, p-cpe:/a:amazon:linux:fltk-fluid-debuginfo, p-cpe:/a:amazon:linux:fltk-fluid, p-cpe:/a:amazon:linux:fltk-static, p-cpe:/a:amazon:linux:fltk
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 11/12/2026
Vulnerability Publication Date: 10/26/2026