CVE ID:	CVE-2020-25725
Description:	In Xpdf 4.02, SplashOutputDev::endType3Char(GfxState *state) SplashOutputDev.cc:3079 is trying to use the freed `t3GlyphStack->cache`, which causes an `heap-use-after-free` problem. The codes of a previous fix for nested Type 3 characters wasn't correctly handling the case where a Type 3 char referred to another char in the same Type 3 font.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2020-25725 FEDORA-2021-013d9a30e0 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VLOYVJSM54IL6I5RY4QTJGRS7PIEG44X/ FEDORA-2021-4a437fe032 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ZUU5QG6SSVRTKZTR3A72LDRVZETEI63/ https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-25725 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-25725 https://forum.xpdfreader.com/viewtopic.php?f=3&t=41915 https://forum.xpdfreader.com/viewtopic.php?f=3&t=41915