Ubuntu Security Notice 3268-1 - Zhenhao Hong discovered that QEMU incorrectly handled the Virtio GPU device. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. It was discovered that QEMU incorrectly handled the JAZZ RC4030 device. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. Jann Horn discovered that QEMU incorrectly handled VirtFS directory sharing. A privileged attacker inside the guest could use this issue to access files on the host file system outside of the shared directory and possibly escalate their privileges. In the default installation, when QEMU is used with libvirt, attackers would be isolated by the libvirt AppArmor profile. Various other issues were also addressed.
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Ubuntu Security Notice 3261-1 - Zhenhao Hong discovered that QEMU incorrectly handled the Virtio GPU device. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS and Ubuntu 16.10. Li Qiang discovered that QEMU incorrectly handled the 6300esb watchdog. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. Various other issues were also addressed.
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Gentoo Linux Security Advisory 201704-1 - Multiple vulnerabilities have been found in QEMU, the worst of which could the worst of which could lead to arbitrary code execution, or cause a Denial of Service condition. Versions less than 2.8.0-r9 are affected.
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QEMU has an issue where virtfs permits a guest to access the entire host filesystem.
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