Hide Forgot
kvm currently mishandles noncanonical addresses when emulating instructions that change rip (eg branches, calls), potentially causing a failed VM-entry. A guest user with access to I/O or MMIO region can use this flaw to crash the guest. Acknowledgements: Red Hat would like to thank Nadav Amit for reporting this issue.
Statement: This issue does affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 7. Future kernel updates may address this issue. This issue does affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 6. The risks associated with fixing this bug are greater than its security impact. This issue is not currently planned to be addressed in future kernel updates for Red Hat Enterprise Linux 6. This issue does affect the kvm packages as shipped with Red Hat Enterprise Linux 5. Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
Upstream patches: http://git.kernel.org/cgit/virt/kvm/kvm.git/commit/?id=d1442d85cc30ea75f7d399474ca738e0bc96f715 http://git.kernel.org/cgit/virt/kvm/kvm.git/commit/?id=234f3ce485d54017f15cf5e0699cff4100121601
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2015:2152 https://rhn.redhat.com/errata/RHSA-2015-2152.html