Debian Linux Security Advisory 3224-1 - Abhishek Arya discovered a buffer overflow in the MakeBigReq macro provided by libx11, which could result in denial of service or the execution of arbitrary code.
a5f77bfaa7d210ea68a4ad432597fc68d849d4c2d8662c2737c1c9a193bf60c3Ubuntu Security Notice 2568-1 - Abhishek Arya discovered that libX11 incorrectly handled memory in the MakeBigReq macro. A remote attacker could use this issue to cause applications to crash, resulting in a denial of service, or possibly execute arbitrary code. In addition, following the macro fix in libx11, a number of other packages have also been rebuilt as security updates including libxrender, libxext, libxi, libxfixes, libxrandr, libsdl1.2, libxv, libxp, and xserver-xorg-video-vmware. Various other issues were also addressed.
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