Gentoo Linux Security Advisory 201710-30 - Multiple vulnerabilities have been found in X.Org Server the worst of which could allow a local attacker to replace shared memory segments. Versions less than 1.19.4 are affected.
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Ubuntu Security Notice 3453-1 - Michal Srb discovered that the X.Org X server incorrectly handled shared memory segments. An attacker able to connect to an X server, either locally or remotely, could use this issue to crash the server, or possibly replace shared memory segments of other X clients in the same session. Michal Srb discovered that the X.Org X server incorrectly handled XKB buffers. An attacker able to connect to an X server, either locally or remotely, could use this issue to crash the server, or possibly execute arbitrary code. Various other issues were also addressed.
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Slackware Security Advisory - New xorg-server packages are available for Slackware 14.0, 14.1, 14.2, and -current to fix security issues.
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