CVE-2007-5378: Tcl Tk Tk Toolkit

Medium severity, CVSS 4.3. EPSS: 2.6% chance of exploitation in the next 30 days.

Buffer overflow in the FileReadGIF function in tkImgGIF.c for Tk Toolkit 8.4.12 and earlier, and 8.3.5 and earlier, allows user-assisted attackers to cause a denial of service (segmentation fault) via an animated GIF in which the first subimage is smaller than a subsequent subimage, which triggers the overflow in the ReadImage function, a different vulnerability than CVE-2007-5137.

Affected products

• Tcl Tk Tk Toolkit: up to and including 8.3.5; up to and including 8.4.12

Published 2007-10-12. Last modified 2026-06-16.