Multiple vulnerabilities have been discovered in the Xen hypervisor: CVE-2018-7540 Jann Horn discovered that missing checks in page table freeing may result in denial of service. CVE-2018-7541 Jan Beulich discovered that incorrect error handling in grant table checks may result in guest-to-host denial of service and potentially privilege escalation. CVE-2018-7542 Ian Jackson discovered that insufficient handling of x86 PVH guests without local APICs may result in guest-to-host denial of service. For the stable distribution (stretch), these problems have been fixed in version 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5. We recommend that you upgrade your xen packages. For the detailed security status of xen please refer to its security tracker page at: https://security-tracker.debian.org/tracker/xen
Multiple vulnerabilities have been discovered in the Xen hypervisor:
Jann Horn discovered that missing checks in page table freeing may result in denial of service.
Jan Beulich discovered that incorrect error handling in grant table checks may result in guest-to-host denial of service and potentially privilege escalation.
Ian Jackson discovered that insufficient handling of x86 PVH guests without local APICs may result in guest-to-host denial of service.
For the stable distribution (stretch), these problems have been fixed in version 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5.
We recommend that you upgrade your xen packages.
For the detailed security status of xen please refer to its security tracker page at: https://security-tracker.debian.org/tracker/xen
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