Qemu emulator built with the IDE Emulation PCI PIIX3/4 support is vulnerable to a use-after-free flaw. It could occur when trying to write data to an I/O port inside guest. This issue is specific to the Xen platform. A privileged(CAP_SYS_RAWIO) guest user on the Xen platform could use this flaw to crash the Qemu instance or probably attempt to make a guest escape. Upstream fix: ------------- -> git.qemu.org/?p=qemu.git;a=commit;h=6cd387833d05e8ad31829d97e474dc420625aed9 Reference: ---------- -> http://www.openwall.com/lists/oss-security/2015/08/03/3
Statement: This issue does not affect the versions of kvm and xen packages as shipped with Red Hat Enterprise Linux 5. This issue does not affect the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 6. This issue does not affect the Red Hat Enterprise Linux 6 based versions of qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3. This issue does not affect the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 7. This issue does not affect the Red Hat Enterprise Linux 7 based versions of the qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3. This issue does not affect the qemu-kvm-rhev packages as shipped with any currently supported versions of Red Hat Enterprise Linux OpenStack Platform.
Created xen tracking bugs for this issue: Affects: fedora-all [bug 1249757]
Created qemu tracking bugs for this issue: Affects: fedora-all [bug 1249758]
External References: http://xenbits.xen.org/xsa/advisory-139.html
Acknowledgement: Red Hat would like to thank the Xen project for reporting this issue. Upstream acknowledges Donghai Zhu of Alibaba as the original reporter.
qemu-2.3.1-1.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.
qemu-2.4.0-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
xen-4.5.1-6.fc23 has been submitted as an update to Fedora 23. https://bodhi.fedoraproject.org/updates/FEDORA-2015-14361
xen-4.5.1-6.fc22 has been submitted as an update to Fedora 22. https://bodhi.fedoraproject.org/updates/FEDORA-2015-14362
xen-4.4.3-1.fc21 has been submitted as an update to Fedora 21. https://bodhi.fedoraproject.org/updates/FEDORA-2015-14363
xen-4.5.1-6.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
xen-4.4.3-3.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.
xen-4.5.1-8.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.