The buildfilterchain function in pdf/pdf-stream.c in Artifex MuPDF before 2017-09-25 mishandles a certain case where a variable may reside in a register, which allows remote attackers to cause a denial of service (Fitz fzdropimp use-after-free and application crash) or possibly have unspecified other impact via a crafted PDF document.

An integer overflow was discovered in pdfreadnewxrefsection in pdf/pdf-xref.c in Artifex MuPDF 1.11.

Artifex MuPDF 1.11 allows attackers to execute arbitrary code or cause a denial of service via a crafted .xps file, related to a "User Mode Write AV near NULL starting at wow64!Wow64NotifyDebugger+0x000000000000001d" on Windows. This occurs because readzipdirimp in fitz/unzip.c does not check whether size fields in a ZIP entry are negative numbers.

Artifex MuPDF 1.11 allows attackers to cause a denial of service or possibly have unspecified other impact via a crafted .xps file, related to "Data from Faulting Address controls Branch Selection starting at mupdf+0x000000000016aa61" on Windows. This occurs because xpsloadlinksinglyphs in xps/xps-link.c does not verify that an xps font could be loaded.

Artifex MuPDF 1.11 allows attackers to cause a denial of service or possibly have unspecified other impact via a crafted .xps file, related to "Data from Faulting Address controls Branch Selection starting at mupdf+0x000000000016cb4f" on Windows. This occurs because of mishandling of XML tag name comparisons.