Multiple buffer overflows in X.Org libXfont before 1.4.8 and 1.4.9x before 1.4.99.901 allow remote font servers to execute arbitrary code via a crafted xfs protocol reply to the (1) fsrecvconnsetup, (2) fsreadopenfont, (3) fsreadqueryinfo, (4) fsreadextentinfo, (5) fsreadglyphs, (6) fsreadlist, or (7) fsreadlistinfo function.

Multiple integer overflows in the (1) fsgetreply, (2) fsallocglyphs, and (3) fsreadextentinfo functions in X.Org libXfont before 1.4.8 and 1.4.9x before 1.4.99.901 allow remote font servers to execute arbitrary code via a crafted xfs reply, which triggers a buffer overflow.

Multiple integer overflows in the (1) FontFileAddEntry and (2) lexAlias functions in X.Org libXfont before 1.4.8 and 1.4.9x before 1.4.99.901 might allow local users to gain privileges by adding a directory with a large fonts.dir or fonts.alias file to the font path, which triggers a heap-based buffer overflow, related to metadata.