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TI-2026-80933 Aliases CVE-2026-116724GHSA-vc45-5x28-58gf

Heap buffer overflow in FLTK BMP image loader via integer overflow

Priority LOW 38CWE-190Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-190 and the CVSS impact.

Summary

FLTK through 1.4.5 contains an integer overflow (CWE-190) in Fl_BMP_Image::load_bmp_() that allocates a pixel buffer too small for the width and height read from the file. A local attacker with no privileges can supply a crafted BMP or ICO file with large dimensions, and if a user opens it, row decoding writes file data past the heap buffer and corrupts the application heap.

Written with Claude Haiku 5.5 from the sources below · 2026-10-31

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00147 3rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
fltkfltkup to 1.4.5—No fix listedCNA
  • fltk Vendorfltk Affected up to 1.4.5 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for FLTK. Red Hat rates this Important and lists Red Hat Enterprise Linux 7, 8 and 9 as affected, with no available plan for a fix.

Written with Claude Haiku 5.5 from the sources below · 2026-10-31

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix yet
Red Hat Enterprise Linux 8AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-116724
  2. 2026-10-27 Affected versions changed · Red Hat
  3. 2026-10-27 CVSS score added · Red Hat
  4. 2026-10-27 Alias added: GHSA-vc45-5x28-58gf
  5. 2026-10-27 Priority changed: MEDIUM → LOW
  6. 2026-10-31 CISA SSVC decision points changed

References

Patch 1

Advisory 1

Other 3

  • TI-2026-80932 Stack buffer overflow in FLTK BMP image loader CVSS 4.0HIGH 8.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences