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The DispatchWrite function in proxy/dispatcher/idirectfbsurfacedispatcher.c in DirectFB 1.4.4 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via the Voodoo interface, which triggers an out-of-bounds write.
Multiple integer signedness errors in the DispatchWrite function in proxy/dispatcher/idirectfbsurfacedispatcher.c in DirectFB 1.4.13 allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via the Voodoo interface, which triggers a stack-based buffer overflow.