Multiple vulnerabilities have been identified in libpng, which could be exploited by attackers to cause a denial of service. These issues are caused by errors in the "pngrtran.c" and "pngset.c" files, and within the "png_handle_pCAL()", "png_handle_sCAL()", "png_push_read_tEXt()", "png_handle_iTXt()", and "png_handle_ztXt()" functions, which could be exploited by attackers to crash an application linked against a vulnerable library, leading to a denial of service condition.
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