Vulnerability in the MIT-SHM extension of the X server on Linux (XFree86) 4.2.1 and earlier allows local users to read and write arbitrary shared memory, possibly to cause a denial of service or gain privileges.
https://exchange.xforce.ibmcloud.com/vulnerabilities/8706
http://www.securityfocus.com/bid/4396
http://www.redhat.com/support/errata/RHSA-2003-067.html
http://www.linuxsecurity.com/advisories/caldera_advisory-2006.html
http://www.debian.org/security/2003/dsa-380
http://sunsolve.sun.com/search/document.do?assetkey=1-77-1017429.1-1
http://sunsolve.sun.com/search/document.do?assetkey=1-66-228529-1
http://marc.info/?l=bugtraq&m=103547625009363&w=2
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000529