QEMU (aka Quick Emulator) built with the TPR optimization for 32-bit Windows guests support is vulnerable to a null pointer dereference flaw. It occurs while doing I/O port write operations via hmp interface. In that, 'current_cpu' remains null, which leads to the null pointer dereference. A user or process could use this flaw to crash the QEMU instance, resulting in DoS issue.
{ "availability": "No subscription required", "ubuntu_priority": "low", "binaries": [ { "qemu-system-misc": "2.0.0+dfsg-2ubuntu1.22", "qemu-guest-agent-dbgsym": "2.0.0+dfsg-2ubuntu1.22", "qemu-system-arm-dbgsym": "2.0.0+dfsg-2ubuntu1.22", "qemu-utils-dbgsym": "2.0.0+dfsg-2ubuntu1.22", "qemu-user": "2.0.0+dfsg-2ubuntu1.22", "qemu-kvm": "2.0.0+dfsg-2ubuntu1.22", "qemu-system-ppc-dbgsym": "2.0.0+dfsg-2ubuntu1.22", "qemu-system-aarch64": "2.0.0+dfsg-2ubuntu1.22", "qemu-user-static": "2.0.0+dfsg-2ubuntu1.22", "qemu-system-arm": "2.0.0+dfsg-2ubuntu1.22", "qemu": "2.0.0+dfsg-2ubuntu1.22", "qemu-system-sparc": "2.0.0+dfsg-2ubuntu1.22", "qemu-system-common-dbgsym": "2.0.0+dfsg-2ubuntu1.22", "qemu-common": "2.0.0+dfsg-2ubuntu1.22", "qemu-system-x86-dbgsym": "2.0.0+dfsg-2ubuntu1.22", "qemu-system": "2.0.0+dfsg-2ubuntu1.22", "qemu-guest-agent": "2.0.0+dfsg-2ubuntu1.22", "qemu-utils": "2.0.0+dfsg-2ubuntu1.22", "qemu-system-misc-dbgsym": "2.0.0+dfsg-2ubuntu1.22", "qemu-system-sparc-dbgsym": "2.0.0+dfsg-2ubuntu1.22", "qemu-system-mips-dbgsym": "2.0.0+dfsg-2ubuntu1.22", "qemu-system-x86": "2.0.0+dfsg-2ubuntu1.22", "qemu-system-ppc": "2.0.0+dfsg-2ubuntu1.22", "qemu-system-common": "2.0.0+dfsg-2ubuntu1.22", "qemu-keymaps": "2.0.0+dfsg-2ubuntu1.22", "qemu-user-static-dbgsym": "2.0.0+dfsg-2ubuntu1.22", "qemu-system-mips": "2.0.0+dfsg-2ubuntu1.22", "qemu-user-dbgsym": "2.0.0+dfsg-2ubuntu1.22" } ] }