A flaw was found in QEMU. The async nature of hot-unplug enables a race scenario where the net device backend is cleared before the virtio-net pci frontend has been unplugged. A malicious guest could use this time window to trigger an assertion and cause a denial of service.
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "qemu-system-misc": "1:4.2-3ubuntu6.27", "qemu-guest-agent-dbgsym": "1:4.2-3ubuntu6.27", "qemu-block-extra-dbgsym": "1:4.2-3ubuntu6.27", "qemu-utils-dbgsym": "1:4.2-3ubuntu6.27", "qemu-user": "1:4.2-3ubuntu6.27", "qemu-system-x86-microvm": "1:4.2-3ubuntu6.27", "qemu-kvm": "1:4.2-3ubuntu6.27", "qemu-system-arm-dbgsym": "1:4.2-3ubuntu6.27", "qemu-system-ppc-dbgsym": "1:4.2-3ubuntu6.27", "qemu-user-static": "1:4.2-3ubuntu6.27", "qemu-system-arm": "1:4.2-3ubuntu6.27", "qemu": "1:4.2-3ubuntu6.27", "qemu-system-x86-xen": "1:4.2-3ubuntu6.27", "qemu-system-sparc": "1:4.2-3ubuntu6.27", "qemu-system-data": "1:4.2-3ubuntu6.27", "qemu-system-common-dbgsym": "1:4.2-3ubuntu6.27", "qemu-system-s390x-dbgsym": "1:4.2-3ubuntu6.27", "qemu-system-x86-dbgsym": "1:4.2-3ubuntu6.27", "qemu-system": "1:4.2-3ubuntu6.27", "qemu-guest-agent": "1:4.2-3ubuntu6.27", "qemu-utils": "1:4.2-3ubuntu6.27", "qemu-system-x86-xen-dbgsym": "1:4.2-3ubuntu6.27", "qemu-block-extra": "1:4.2-3ubuntu6.27", "qemu-system-misc-dbgsym": "1:4.2-3ubuntu6.27", "qemu-system-sparc-dbgsym": "1:4.2-3ubuntu6.27", "qemu-system-mips-dbgsym": "1:4.2-3ubuntu6.27", "qemu-system-x86": "1:4.2-3ubuntu6.27", "qemu-system-ppc": "1:4.2-3ubuntu6.27", "qemu-system-s390x": "1:4.2-3ubuntu6.27", "qemu-system-x86-microvm-dbgsym": "1:4.2-3ubuntu6.27", "qemu-system-common": "1:4.2-3ubuntu6.27", "qemu-system-gui-dbgsym": "1:4.2-3ubuntu6.27", "qemu-user-static-dbgsym": "1:4.2-3ubuntu6.27", "qemu-system-mips": "1:4.2-3ubuntu6.27", "qemu-system-gui": "1:4.2-3ubuntu6.27", "qemu-user-binfmt": "1:4.2-3ubuntu6.27", "qemu-user-dbgsym": "1:4.2-3ubuntu6.27" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "qemu-system-misc": "1:6.2+dfsg-2ubuntu6.16", "qemu-guest-agent-dbgsym": "1:6.2+dfsg-2ubuntu6.16", "qemu-block-extra-dbgsym": "1:6.2+dfsg-2ubuntu6.16", "qemu-utils-dbgsym": "1:6.2+dfsg-2ubuntu6.16", "qemu-user": "1:6.2+dfsg-2ubuntu6.16", "qemu-system-x86-microvm": "1:6.2+dfsg-2ubuntu6.16", "qemu-system-arm-dbgsym": "1:6.2+dfsg-2ubuntu6.16", "qemu-system-ppc-dbgsym": "1:6.2+dfsg-2ubuntu6.16", "qemu-user-static": "1:6.2+dfsg-2ubuntu6.16", "qemu-system-arm": "1:6.2+dfsg-2ubuntu6.16", "qemu": "1:6.2+dfsg-2ubuntu6.16", "qemu-system-x86-xen": "1:6.2+dfsg-2ubuntu6.16", "qemu-system-sparc": "1:6.2+dfsg-2ubuntu6.16", "qemu-system-data": "1:6.2+dfsg-2ubuntu6.16", "qemu-system-common-dbgsym": "1:6.2+dfsg-2ubuntu6.16", "qemu-system-s390x-dbgsym": "1:6.2+dfsg-2ubuntu6.16", "qemu-system-x86-dbgsym": "1:6.2+dfsg-2ubuntu6.16", "qemu-system": "1:6.2+dfsg-2ubuntu6.16", "qemu-guest-agent": "1:6.2+dfsg-2ubuntu6.16", "qemu-utils": "1:6.2+dfsg-2ubuntu6.16", "qemu-system-x86-xen-dbgsym": "1:6.2+dfsg-2ubuntu6.16", "qemu-block-extra": "1:6.2+dfsg-2ubuntu6.16", "qemu-system-sparc-dbgsym": "1:6.2+dfsg-2ubuntu6.16", "qemu-system-misc-dbgsym": "1:6.2+dfsg-2ubuntu6.16", "qemu-system-mips-dbgsym": "1:6.2+dfsg-2ubuntu6.16", "qemu-system-x86": "1:6.2+dfsg-2ubuntu6.16", "qemu-system-ppc": "1:6.2+dfsg-2ubuntu6.16", "qemu-system-s390x": "1:6.2+dfsg-2ubuntu6.16", "qemu-system-common": "1:6.2+dfsg-2ubuntu6.16", "qemu-system-gui-dbgsym": "1:6.2+dfsg-2ubuntu6.16", "qemu-user-static-dbgsym": "1:6.2+dfsg-2ubuntu6.16", "qemu-system-mips": "1:6.2+dfsg-2ubuntu6.16", "qemu-system-gui": "1:6.2+dfsg-2ubuntu6.16", "qemu-user-binfmt": "1:6.2+dfsg-2ubuntu6.16", "qemu-user-dbgsym": "1:6.2+dfsg-2ubuntu6.16" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "qemu-system-misc": "1:8.0.4+dfsg-1ubuntu5", "qemu-guest-agent-dbgsym": "1:8.0.4+dfsg-1ubuntu5", "qemu-block-extra-dbgsym": "1:8.0.4+dfsg-1ubuntu5", "qemu-utils-dbgsym": "1:8.0.4+dfsg-1ubuntu5", "qemu-user": "1:8.0.4+dfsg-1ubuntu5", "qemu-system-arm-dbgsym": "1:8.0.4+dfsg-1ubuntu5", "qemu-system-ppc-dbgsym": "1:8.0.4+dfsg-1ubuntu5", "qemu-user-static": "1:8.0.4+dfsg-1ubuntu5", "qemu-system-arm": "1:8.0.4+dfsg-1ubuntu5", "qemu-system-xen-dbgsym": "1:8.0.4+dfsg-1ubuntu5", "qemu-system-x86-xen": "1:8.0.4+dfsg-1ubuntu5", "qemu-system-sparc": "1:8.0.4+dfsg-1ubuntu5", "qemu-system-data": "1:8.0.4+dfsg-1ubuntu5", "qemu-system-common-dbgsym": "1:8.0.4+dfsg-1ubuntu5", "qemu-system-s390x-dbgsym": "1:8.0.4+dfsg-1ubuntu5", "qemu-system-x86-dbgsym": "1:8.0.4+dfsg-1ubuntu5", "qemu-system": "1:8.0.4+dfsg-1ubuntu5", "qemu-guest-agent": "1:8.0.4+dfsg-1ubuntu5", "qemu-system-xen": "1:8.0.4+dfsg-1ubuntu5", "qemu-utils": "1:8.0.4+dfsg-1ubuntu5", "qemu-system-sparc-dbgsym": "1:8.0.4+dfsg-1ubuntu5", "qemu-block-extra": "1:8.0.4+dfsg-1ubuntu5", "qemu-system-misc-dbgsym": "1:8.0.4+dfsg-1ubuntu5", "qemu-system-mips-dbgsym": "1:8.0.4+dfsg-1ubuntu5", "qemu-system-x86": "1:8.0.4+dfsg-1ubuntu5", "qemu-system-ppc": "1:8.0.4+dfsg-1ubuntu5", "qemu-system-s390x": "1:8.0.4+dfsg-1ubuntu5", "qemu-system-common": "1:8.0.4+dfsg-1ubuntu5", "qemu-system-gui-dbgsym": "1:8.0.4+dfsg-1ubuntu5", "qemu-user-static-dbgsym": "1:8.0.4+dfsg-1ubuntu5", "qemu-system-mips": "1:8.0.4+dfsg-1ubuntu5", "qemu-system-gui": "1:8.0.4+dfsg-1ubuntu5", "qemu-user-binfmt": "1:8.0.4+dfsg-1ubuntu5", "qemu-user-dbgsym": "1:8.0.4+dfsg-1ubuntu5" } ] }