Race condition in the s_xout kernel module in Sun Solstice X.25 9.2, when running on a multiple CPU machine, allows local users to cause a denial of service (panic) via vectors involving reading the /dev/xty file.
https://exchange.xforce.ibmcloud.com/vulnerabilities/46466
http://www.vupen.com/english/advisories/2008/3087
http://www.securityfocus.com/bid/32215
http://sunsolve.sun.com/search/document.do?assetkey=1-26-243106-1
http://sunsolve.sun.com/search/document.do?assetkey=1-21-108670-21-1
http://sunsolve.sun.com/search/document.do?assetkey=1-21-108669-21-1