FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

xen-kernel -- XENMEM_exchange error handling issues

Affected packages
xen-kernel < 4.5.2_1


VuXML ID bcad3faa-b40c-11e5-9728-002590263bf5
Discovery 2015-12-08
Entry 2016-01-06

The Xen Project reports:

Error handling in the operation may involve handing back pages to the domain. This operation may fail when in parallel the domain gets torn down. So far this failure unconditionally resulted in the host being brought down due to an internal error being assumed. This is CVE-2015-8339.

Furthermore error handling so far wrongly included the release of a lock. That lock, however, was either not acquired or already released on all paths leading to the error handling sequence. This is CVE-2015-8340.

A malicious guest administrator may be able to deny service by crashing the host or causing a deadlock.


CVE Name CVE-2015-8339
CVE Name CVE-2015-8340
FreeBSD PR ports/205841