Security update for xen (important)

This update for xen fixes several issues. These security issues were fixed: - CVE-2017-12135: Unbounded recursion in grant table code allowed a malicious guest to crash the host or potentially escalate privileges/leak information XSA-226, bsc1051787. - CVE-2017-12137: Incorrectly-aligned updates ...

Fedora 26 : xen (2017-f336ba205d)

Qemu: serial: host memory leakage 16550A UART emulation CVE-2017-5579 1416162 Qemu: display: cirrus: OOB read access issue CVE-2017-7718 1443444 xen: various flaws 1481765 multiple problems with transitive grants XSA-226, CVE-2017-12135 x86: PV privilege escalation via mapgrantref XSA-227,...