image-png.c: Handle libpng errors via longjmp()/setjmp()#168
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Libpng expects callers to set their own error handlers if they don't want to abort the whole process, and this has to be handled by longjmp()/setjmp(). It follows the C standard, so any C-standard compliant compiler should work fine. Setting pointers as volatile is to prevent possible undefined behavior. Fixes CVE-2026-64612 Assisted-by: Claude Code by Anthropic
tillkamppeter
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Jul 23, 2026
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Libpng expects callers to set their own error handlers if they don't want to abort the whole process, and this has to be handled by longjmp()/setjmp().
It follows the C standard, so any C-standard compliant compiler should work fine. Setting pointers as volatile is to prevent possible undefined behavior.
Fixes CVE-2026-64612
Assisted-by: Claude Code by Anthropic