|Description||An issue was discovered in Xen through 4.9.x. Grant copying code made an implication that any grant pin would be accompanied by a suitable page reference. Other portions of code, however, did not match up with that assumption. When such a grant copy operation is being done on a grant of a dying domain, the assumption turns out wrong. A malicious guest administrator can cause hypervisor memory corruption, most likely resulting in host crash and a Denial of Service. Privilege escalation and information leaks cannot be ruled out.|
|Source||CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)|
|NVD severity||high (attack range: remote)|
Vulnerable and fixed packages
The table below lists information on source packages.
|xen (PTS)||jessie (security), jessie||4.4.1-9+deb8u10||vulnerable|
|buster, stretch, sid||4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9||fixed|
The information below is based on the following data on fixed versions.
|Package||Type||Release||Fixed Version||Urgency||Origin||Debian Bugs|
[wheezy] - xen <not-affected> (Vulnerable code not present)