|Description||A grant unmapping issue was discovered in Xen through 4.9.x. When removing or replacing a grant mapping, the x86 PV specific path needs to make sure page table entries remain in sync with other accounting done. Although the identity of the page frame was validated correctly, neither the presence of the mapping nor page writability were taken into account.|
|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: local)|
Vulnerable and fixed packages
The table below lists information on source packages.
|xen (PTS)||jessie (security), jessie||4.4.1-9+deb8u10||vulnerable|
|buster, sid, stretch (security), stretch||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|