CVE-2016-6912: Double free vulnerability in the gdImageWebPtr function in the GD Graphics Library (aka libgd) before 2.2.4...

Security readout for executives and security teams

CVE-2016-6912 is a memory-management flaw in the GD Graphics Library, a component used by some applications to generate images. Public records say versions before libgd 2.2.4 can double-free memory when handling large width and height values. The impact is listed as unspecified, so urgency depends on whether internet-facing systems process untrusted image parameters through libgd. Exposure is most likely where applications or services use libgd before 2.2.4 to generate WebP images or process image dimensions influenced by untrusted users. The bundle does not identify specific affected products beyond GD Graphics Library/libgd. Treat this as a targeted dependency hygiene issue unless exposure is confirmed on internet-facing image-generation paths. Because the impact is unspecified and no active exploitation is cited, prioritize discovery and patching over emergency response. Mitigation focus: Upgrade libgd to 2.2.4 or a vendor package containing the fix.; For Debian systems, review DSA-3777 and apply the supported security update.; Prioritize internet-facing services that process untrusted image dimensions through libgd..

Prepared

Jun 13, 2026, 12:51 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.