On AMD processors supporting XSAVE/XRSTOR (family 15h and up), when an exception is pending, these instructions save/restore only the FOP, FIP, and FDP x87 registers in FXSAVE/FXRSTOR. This allows one domain to determine portions of the state of floating point instructions of other domains. A malicious domain may be able to leverage this to obtain sensitive information such as cryptographic keys from another domain. Acknowledgements: Red Hat would like to thank the Xen project for reporting this issue.
Statement: Not vulnerable. This issue did not affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5. This issue did not affect Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG as we did not have support for Xen hypervisor.
Now public via: http://www.openwall.com/lists/oss-security/2013/06/03/1
Created xen tracking bugs for this issue Affects: fedora-all [bug 970206]
xen-4.2.2-6.fc19 has been pushed to the Fedora 19 stable repository. If problems still persist, please make note of it in this bug report.
xen-4.2.2-6.fc18 has been pushed to the Fedora 18 stable repository. If problems still persist, please make note of it in this bug report.
xen-4.1.5-5.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report.