The PNG reference library (aka libpng) before 1.0.43, and 1.2.x before 1.2.35, as used in pngcrush and other applications, allows context-dependent attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted PNG file that triggers a free of an uninitialized pointer in (1) the png_read_png function, (2) pCAL chunk handling, or (3) setup of 16-bit gamma tables.
AV:N/AC:M/Au:N/C:P/I:P/A:P
This vulnerability has a 4.83% probability of being exploited in the next 30 days, ranking higher than 92% of all scored CVEs.