Advisory Published
Updated

CVE-2021-28711

First published: Wed Jan 05 2022(Updated: )

Rogue backends can cause DoS of guests via high frequency events T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen offers the ability to run PV backends in regular unprivileged guests, typically referred to as "driver domains". Running PV backends in driver domains has one primary security advantage: if a driver domain gets compromised, it doesn't have the privileges to take over the system. However, a malicious driver domain could try to attack other guests via sending events at a high frequency leading to a Denial of Service in the guest due to trying to service interrupts for elongated amounts of time. There are three affected backends: * blkfront patch 1, CVE-2021-28711 * netfront patch 2, CVE-2021-28712 * hvc_xen (console) patch 3, CVE-2021-28713

Credit: security@xen.org security@xen.org

Affected SoftwareAffected VersionHow to fix
Xen Xen
Debian Debian Linux=9.0
Debian Debian Linux=10.0
Debian Debian Linux=11.0
ubuntu/linux<4.15.0-169.177
4.15.0-169.177
ubuntu/linux<5.4.0-105.119
5.4.0-105.119
ubuntu/linux<5.13.0-37.42
5.13.0-37.42
ubuntu/linux<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux<4.4.0-239.273
4.4.0-239.273
ubuntu/linux-allwinner<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-allwinner-5.19<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-aws<4.15.0-1121.129
4.15.0-1121.129
ubuntu/linux-aws<5.4.0-1069.73
5.4.0-1069.73
ubuntu/linux-aws<5.13.0-1019.21
5.13.0-1019.21
ubuntu/linux-aws<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-aws-5.0<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-aws-5.11<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-aws-5.13<5.13.0-1019.21~20.04.1
5.13.0-1019.21~20.04.1
ubuntu/linux-aws-5.13<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-aws-5.15<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-aws-5.19<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-aws-5.3<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-aws-5.4<5.4.0-1069.73~18.04.1
5.4.0-1069.73~18.04.1
ubuntu/linux-aws-5.4<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-aws-5.8<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-aws-6.5<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-aws-fips<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-aws-hwe<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-aws-hwe<4.15.0-1120.128~16.04.1
4.15.0-1120.128~16.04.1
ubuntu/linux-azure<5.4.0-1073.76
5.4.0-1073.76
ubuntu/linux-azure<5.13.0-1021.24
5.13.0-1021.24
ubuntu/linux-azure<4.15.0-1131.144~14.04.1
4.15.0-1131.144~14.04.1
ubuntu/linux-azure<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-azure<4.15.0-1131.144~16.04.1
4.15.0-1131.144~16.04.1
ubuntu/linux-azure-4.15<4.15.0-1131.144
4.15.0-1131.144
ubuntu/linux-azure-4.15<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-azure-5.11<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-azure-5.13<5.13.0-1021.24~20.04.1
5.13.0-1021.24~20.04.1
ubuntu/linux-azure-5.13<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-azure-5.15<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-azure-5.3<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-azure-5.4<5.4.0-1073.76~18.04.1
5.4.0-1073.76~18.04.1
ubuntu/linux-azure-5.4<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-azure-6.2<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-azure-6.5<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-azure-edge<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-azure-fde<5.4.0-1073.76
5.4.0-1073.76
ubuntu/linux-azure-fde<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-azure-fde-5.15<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-azure-fde-5.19<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-azure-fde-6.2<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-azure-fips<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-bluefield<5.4.0-1032.35
5.4.0-1032.35
ubuntu/linux-bluefield<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-dell300x<4.15.0-1035.40
4.15.0-1035.40
ubuntu/linux-dell300x<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-fips<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-gcp<5.4.0-1068.72
5.4.0-1068.72
ubuntu/linux-gcp<5.13.0-1021.25
5.13.0-1021.25
ubuntu/linux-gcp<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-gcp<4.15.0-1116.130~16.04.1
4.15.0-1116.130~16.04.1
ubuntu/linux-gcp-4.15<4.15.0-1116.130
4.15.0-1116.130
ubuntu/linux-gcp-4.15<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-gcp-5.11<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-gcp-5.13<5.13.0-1021.25~20.04.1
5.13.0-1021.25~20.04.1
ubuntu/linux-gcp-5.13<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-gcp-5.15<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-gcp-5.3<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-gcp-5.4<5.4.0-1068.72~18.04.1
5.4.0-1068.72~18.04.1
ubuntu/linux-gcp-5.8<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-gcp-6.5<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-gcp-fips<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-gke<5.4.0-1066.69
5.4.0-1066.69
ubuntu/linux-gke<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-gke-4.15<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-gke-5.0<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-gke-5.15<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-gke-5.3<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-gke-5.4<5.4.0-1066.69~18.04.1
5.4.0-1066.69~18.04.1
ubuntu/linux-gke-5.4<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-gkeop<5.4.0-1037.38
5.4.0-1037.38
ubuntu/linux-gkeop<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-gkeop-5.15<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-gkeop-5.4<5.4.0-1037.38~18.04.1
5.4.0-1037.38~18.04.1
ubuntu/linux-gkeop-5.4<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-hwe<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-hwe<4.15.0-169.177~16.04.1
4.15.0-169.177~16.04.1
ubuntu/linux-hwe-5.11<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-hwe-5.13<5.13.0-37.42~20.04.1
5.13.0-37.42~20.04.1
ubuntu/linux-hwe-5.13<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-hwe-5.15<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-hwe-5.4<5.4.0-105.119~18.04.1
5.4.0-105.119~18.04.1
ubuntu/linux-hwe-5.4<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-hwe-5.8<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-hwe-6.2<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-hwe-6.5<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-hwe-edge<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-ibm<5.4.0-1018.20
5.4.0-1018.20
ubuntu/linux-ibm<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-ibm-5.15<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-ibm-5.4<5.4.0-1018.20~18.04.1
5.4.0-1018.20~18.04.1
ubuntu/linux-ibm-5.4<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-intel<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-intel-5.13<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-intel-iotg<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-intel-iotg-5.15<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-iot<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-kvm<4.15.0-1107.109
4.15.0-1107.109
ubuntu/linux-kvm<5.4.0-1059.62
5.4.0-1059.62
ubuntu/linux-kvm<5.13.0-1018.19
5.13.0-1018.19
ubuntu/linux-kvm<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-kvm<4.4.0-1118.128
4.4.0-1118.128
ubuntu/linux-laptop<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-lowlatency<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-lowlatency-hwe-5.15<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-lowlatency-hwe-5.19<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-lowlatency-hwe-6.2<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-lowlatency-hwe-6.5<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-lts-xenial<4.4.0-239.273~14.04.1
4.4.0-239.273~14.04.1
ubuntu/linux-lts-xenial<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-nvidia<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-nvidia-6.5<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-oem<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-oem-5.10<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-oem-5.13<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-oem-5.17<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-oem-5.6<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-oem-6.0<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-oem-6.1<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-oem-6.5<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-oem-6.8<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-oem-osp1<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-oracle<4.15.0-1087.95
4.15.0-1087.95
ubuntu/linux-oracle<5.4.0-1067.72
5.4.0-1067.72
ubuntu/linux-oracle<5.13.0-1023.28
5.13.0-1023.28
ubuntu/linux-oracle<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-oracle<4.15.0-1087.95~16.04.1
4.15.0-1087.95~16.04.1
ubuntu/linux-oracle-5.0<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-oracle-5.11<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-oracle-5.13<5.13.0-1025.30~20.04.1
5.13.0-1025.30~20.04.1
ubuntu/linux-oracle-5.13<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-oracle-5.15<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-oracle-5.3<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-oracle-5.4<5.4.0-1067.72~18.04.1
5.4.0-1067.72~18.04.1
ubuntu/linux-oracle-6.5<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-raspi<5.4.0-1056.63
5.4.0-1056.63
ubuntu/linux-raspi<5.13.0-1022.24
5.13.0-1022.24
ubuntu/linux-raspi<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-raspi-5.4<5.4.0-1056.63~18.04.1
5.4.0-1056.63~18.04.1
ubuntu/linux-raspi-5.4<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-raspi2<4.15.0-1103.110
4.15.0-1103.110
ubuntu/linux-raspi2<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-raspi2-5.3<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-riscv<5.13.0-1017.19
5.13.0-1017.19
ubuntu/linux-riscv<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-riscv-5.11<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-riscv-5.15<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-riscv-5.8<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-riscv-6.5<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-snapdragon<4.15.0-1120.129
4.15.0-1120.129
ubuntu/linux-snapdragon<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-starfive<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-starfive-5.19<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-starfive-6.5<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
ubuntu/linux-xilinx-zynqmp<5.16~<4.4.296<5.4.168<5.15.11
5.16~
4.4.296
5.4.168
5.15.11
debian/linux
5.10.218-1
6.1.94-1
6.1.90-1
6.9.7-1
6.9.8-1

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Parent vulnerabilities

(Appears in the following advisories)

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