USN-4945-1: Linux kernel vulnerabilities
11 May 2021
Several security issues were fixed in the Linux kernel.
Releases
Packages
- linux - Linux kernel
- linux-aws - Linux kernel for Amazon Web Services (AWS) systems
- linux-aws-5.4 - Linux kernel for Amazon Web Services (AWS) systems
- linux-azure - Linux kernel for Microsoft Azure Cloud systems
- linux-azure-5.4 - Linux kernel for Microsoft Azure cloud systems
- linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
- linux-gcp-5.4 - Linux kernel for Google Cloud Platform (GCP) systems
- linux-gke - Linux kernel for Google Container Engine (GKE) systems
- linux-gke-5.4 - Linux kernel for Google Container Engine (GKE) systems
- linux-gkeop - Linux kernel for Google Container Engine (GKE) systems
- linux-gkeop-5.4 - Linux kernel for Google Container Engine (GKE) systems
- linux-hwe-5.4 - Linux hardware enablement (HWE) kernel
- linux-kvm - Linux kernel for cloud environments
- linux-oracle - Linux kernel for Oracle Cloud systems
- linux-oracle-5.4 - Linux kernel for Oracle Cloud systems
Details
It was discovered that the Nouveau GPU driver in the Linux kernel did not
properly handle error conditions in some situations. A local attacker could
use this to cause a denial of service (system crash). (CVE-2020-25639)
Jan Beulich discovered that the Xen netback backend in the Linux kernel did
not properly handle certain error conditions under paravirtualization. An
attacker in a guest VM could possibly use this to cause a denial of service
(host domain crash). (CVE-2021-28038)
It was discovered that the fastrpc driver in the Linux kernel did not
prevent user space applications from sending kernel RPC messages. A local
attacker could possibly use this to gain elevated privileges.
(CVE-2021-28375)
It was discovered that the Realtek RTL8188EU Wireless device driver in the
Linux kernel did not properly validate ssid lengths in some situations. An
attacker could use this to cause a denial of service (system crash).
(CVE-2021-28660)
It was discovered that the USB/IP driver in the Linux kernel contained race
conditions during the update of local and shared status. An attacker could
use this to cause a denial of service (system crash). (CVE-2021-29265)
It was discovered that a race condition existed in the netfilter subsystem
of the Linux kernel when replacing tables. A local attacker could use this
to cause a denial of service (system crash). (CVE-2021-29650)
Arnd Bergmann discovered that the video4linux subsystem in the Linux kernel
did not properly deallocate memory in some situations. A local attacker
could use this to cause a denial of service (memory exhaustion).
(CVE-2021-30002)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.04
-
linux-image-5.4.0-1015-gkeop
-
5.4.0-1015.16
-
linux-image-5.4.0-1039-kvm
-
5.4.0-1039.40
-
linux-image-5.4.0-1043-gcp
-
5.4.0-1043.46
-
linux-image-5.4.0-1043-gke
-
5.4.0-1043.45
-
linux-image-5.4.0-1045-oracle
-
5.4.0-1045.49+1
-
linux-image-5.4.0-1047-azure
-
5.4.0-1047.49
-
linux-image-5.4.0-1048-aws
-
5.4.0-1048.50
-
linux-image-5.4.0-73-generic
-
5.4.0-73.82
-
linux-image-5.4.0-73-generic-lpae
-
5.4.0-73.82
-
linux-image-5.4.0-73-lowlatency
-
5.4.0-73.82
-
linux-image-aws
-
5.4.0.1048.49
-
linux-image-azure
-
5.4.0.1047.45
-
linux-image-gcp
-
5.4.0.1043.52
-
linux-image-generic
-
5.4.0.73.76
-
linux-image-generic-lpae
-
5.4.0.73.76
-
linux-image-gke
-
5.4.0.1043.52
-
linux-image-gke-5.4
-
5.4.0.1043.52
-
linux-image-gkeop
-
5.4.0.1015.18
-
linux-image-gkeop-5.4
-
5.4.0.1015.18
-
linux-image-kvm
-
5.4.0.1039.37
-
linux-image-lowlatency
-
5.4.0.73.76
-
linux-image-oem
-
5.4.0.73.76
-
linux-image-oem-osp1
-
5.4.0.73.76
-
linux-image-oracle
-
5.4.0.1045.44
-
linux-image-virtual
-
5.4.0.73.76
Ubuntu 18.04
-
linux-image-5.4.0-1015-gkeop
-
5.4.0-1015.16~18.04.1
-
linux-image-5.4.0-1043-gcp
-
5.4.0-1043.46~18.04.1
-
linux-image-5.4.0-1043-gke
-
5.4.0-1043.45~18.04.1
-
linux-image-5.4.0-1044-oracle
-
5.4.0-1044.47~18.04.1
-
linux-image-5.4.0-1047-azure
-
5.4.0-1047.49~18.04.1
-
linux-image-5.4.0-1048-aws
-
5.4.0-1048.50~18.04.1
-
linux-image-5.4.0-73-generic
-
5.4.0-73.82~18.04.1
-
linux-image-5.4.0-73-generic-lpae
-
5.4.0-73.82~18.04.1
-
linux-image-5.4.0-73-lowlatency
-
5.4.0-73.82~18.04.1
-
linux-image-aws
-
5.4.0.1048.30
-
linux-image-azure
-
5.4.0.1047.26
-
linux-image-gcp
-
5.4.0.1043.30
-
linux-image-generic-hwe-18.04
-
5.4.0.73.82~18.04.66
-
linux-image-generic-lpae-hwe-18.04
-
5.4.0.73.82~18.04.66
-
linux-image-gke-5.4
-
5.4.0.1043.45~18.04.9
-
linux-image-gkeop-5.4
-
5.4.0.1015.16~18.04.16
-
linux-image-lowlatency-hwe-18.04
-
5.4.0.73.82~18.04.66
-
linux-image-oem
-
5.4.0.73.82~18.04.66
-
linux-image-oem-osp1
-
5.4.0.73.82~18.04.66
-
linux-image-oracle
-
5.4.0.1044.47~18.04.26
-
linux-image-snapdragon-hwe-18.04
-
5.4.0.73.82~18.04.66
-
linux-image-virtual-hwe-18.04
-
5.4.0.73.82~18.04.66
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.
Related notices
- USN-4946-1: linux-image-azure-lts-18.04, linux-image-generic-lpae-hwe-16.04, linux-snapdragon, linux-aws, linux-image-4.15.0-143-generic-lpae, linux-image-gcp, linux-azure, linux-image-gcp-lts-18.04, linux-image-snapdragon, linux-image-generic-lpae, linux-image-4.15.0-1102-snapdragon, linux-image-kvm, linux-image-lowlatency-hwe-16.04, linux-image-4.15.0-143-generic, linux-image-4.15.0-1071-oracle, linux-image-oracle, linux-image-dell300x, linux-image-generic-hwe-16.04-edge, linux-image-oem, linux, linux-image-4.15.0-1114-azure, linux-image-generic, linux-image-lowlatency, linux-image-generic-hwe-16.04, linux-gcp, linux-image-lowlatency-hwe-16.04-edge, linux-image-virtual-hwe-16.04-edge, linux-image-generic-lpae-hwe-16.04-edge, linux-image-4.15.0-1018-dell300x, linux-image-oracle-lts-18.04, linux-gcp-4.15, linux-image-4.15.0-143-lowlatency, linux-image-azure, linux-image-aws-lts-18.04, linux-oracle, linux-image-4.15.0-1091-kvm, linux-azure-4.15, linux-image-virtual, linux-raspi2, linux-kvm, linux-aws-hwe, linux-image-aws-hwe, linux-image-4.15.0-1085-raspi2, linux-image-4.15.0-1102-aws, linux-image-virtual-hwe-16.04, linux-image-raspi2, linux-hwe, linux-image-gke, linux-image-4.15.0-1099-gcp, linux-dell300x
- USN-4949-1: linux-image-generic-64k-hwe-20.04-edge, linux-image-5.8.0-1024-raspi-nolpae, linux-aws, linux-image-5.8.0-1027-kvm, linux-image-generic-lpae-hwe-20.04, linux-image-5.8.0-1029-oracle, linux-image-5.8.0-53-generic, linux-image-gcp, linux-image-virtual-hwe-20.04, linux-azure, linux-image-5.8.0-1033-aws, linux-image-generic-lpae, linux-image-kvm, linux-image-5.8.0-1024-raspi, linux-image-raspi-nolpae, linux-image-5.8.0-1032-azure, linux-image-generic-64k, linux-image-oem-20.04, linux-image-oracle, linux-image-generic-lpae-hwe-20.04-edge, linux-image-lowlatency-hwe-20.04-edge, linux-image-virtual-hwe-20.04-edge, linux, linux-image-generic, linux-image-5.8.0-1031-gcp, linux-image-lowlatency, linux-gcp, linux-image-5.8.0-53-generic-lpae, linux-image-generic-hwe-20.04, linux-image-generic-hwe-20.04-edge, linux-image-5.8.0-53-lowlatency, linux-image-aws, linux-image-azure, linux-oracle, linux-image-virtual, linux-kvm, linux-image-lowlatency-hwe-20.04, linux-raspi, linux-image-generic-64k-hwe-20.04, linux-image-5.8.0-53-generic-64k, linux-image-raspi, linux-image-gke, linux-hwe-5.8
- USN-4945-2: linux-image-raspi-hwe-18.04-edge, linux-image-5.4.0-1035-raspi, linux-image-raspi-hwe-18.04, linux-raspi, linux-raspi-5.4, linux-image-raspi2, linux-image-raspi2-hwe-18.04-edge, linux-image-raspi, linux-image-raspi2-hwe-18.04
- USN-4979-1: linux-image-azure-lts-18.04, linux-image-generic-lpae-hwe-16.04, linux-snapdragon, linux-aws, linux-image-gcp, linux-azure, linux-image-gcp-lts-18.04, linux-image-4.15.0-1072-oracle, linux-image-generic-lpae, linux-image-snapdragon, linux-image-kvm, linux-image-lowlatency-hwe-16.04, linux-image-4.15.0-1103-aws, linux-image-oracle, linux-image-generic-hwe-16.04-edge, linux-image-oem, linux, linux-image-4.15.0-1100-gcp, linux-image-4.15.0-144-lowlatency, linux-image-azure-edge, linux-image-generic, linux-image-lowlatency, linux-image-generic-hwe-16.04, linux-image-4.15.0-1092-kvm, linux-gcp, linux-image-lowlatency-hwe-16.04-edge, linux-image-virtual-hwe-16.04-edge, linux-image-generic-lpae-hwe-16.04-edge, linux-image-oracle-lts-18.04, linux-gcp-4.15, linux-image-4.15.0-144-generic-lpae, linux-image-azure, linux-image-aws-lts-18.04, linux-oracle, linux-azure-4.15, linux-image-virtual, linux-image-4.15.0-1115-azure, linux-raspi2, linux-image-4.15.0-1086-raspi2, linux-aws-hwe, linux-kvm, linux-image-4.15.0-1103-snapdragon, linux-image-aws-hwe, linux-image-virtual-hwe-16.04, linux-image-raspi2, linux-hwe, linux-image-4.15.0-144-generic, linux-image-gke
- USN-4984-1: linux-image-generic-64k-hwe-20.04-edge, linux-image-5.8.0-1032-gcp, linux-image-5.8.0-1035-aws, linux-aws, linux-image-5.8.0-1026-raspi, linux-image-generic-lpae-hwe-20.04, linux-image-gcp, linux-image-virtual-hwe-20.04, linux-azure, linux-image-generic-lpae, linux-image-5.8.0-1031-oracle, linux-image-kvm, linux-image-raspi-nolpae, linux-image-generic-64k, linux-image-5.8.0-1026-raspi-nolpae, linux-image-oem-20.04, linux-image-oracle, linux-image-generic-lpae-hwe-20.04-edge, linux-image-lowlatency-hwe-20.04-edge, linux-image-virtual-hwe-20.04-edge, linux, linux-image-generic, linux-image-lowlatency, linux-gcp, linux-image-generic-hwe-20.04, linux-image-generic-hwe-20.04-edge, linux-image-5.8.0-55-generic, linux-image-aws, linux-image-azure, linux-image-5.8.0-1028-kvm, linux-oracle, linux-image-virtual, linux-image-5.8.0-55-generic-64k, linux-image-5.8.0-55-lowlatency, linux-image-5.8.0-55-generic-lpae, linux-kvm, linux-image-lowlatency-hwe-20.04, linux-raspi, linux-image-generic-64k-hwe-20.04, linux-image-5.8.0-1033-azure, linux-image-raspi, linux-image-gke, linux-hwe-5.8
- USN-4911-1: linux-image-oem-20.04-edge, linux-image-oem-20.04b, linux-image-5.10.0-1021-oem, linux-oem-5.10
- USN-4947-1: linux-image-oem-20.04, linux-image-5.6.0-1056-oem, linux-oem-5.6
- USN-4904-1: linux-image-virtual-lts-utopic, linux-image-generic-lpae-lts-utopic, linux-image-4.4.0-208-lowlatency, linux-image-powerpc64-smp, linux-image-virtual-lts-vivid, linux-image-virtual-lts-wily, linux-snapdragon, linux-aws, linux-image-generic-lts-vivid, linux-image-powerpc-e500mc-lts-xenial, linux-image-generic-lts-xenial, linux-image-powerpc-e500mc-lts-wily, linux-image-snapdragon, linux-image-generic-lpae, linux-image-kvm, linux-image-powerpc64-emb, linux-image-powerpc64-smp-lts-wily, linux-image-generic-lpae-lts-wily, linux-image-powerpc-smp, linux-image-lowlatency-lts-utopic, linux-image-generic-lts-wily, linux-image-4.4.0-208-generic, linux-image-lowlatency-lts-vivid, linux-image-powerpc64-smp-lts-utopic, linux-image-4.4.0-1126-aws, linux-image-4.4.0-1091-kvm, linux-image-powerpc-e500mc-lts-utopic, linux, linux-image-generic, linux-image-lowlatency-lts-xenial, linux-image-powerpc64-smp-lts-vivid, linux-image-lowlatency, linux-image-powerpc64-emb-lts-xenial, linux-image-4.4.0-208-powerpc64-smp, linux-image-powerpc-smp-lts-xenial, linux-image-powerpc64-smp-lts-xenial, linux-image-powerpc-smp-lts-utopic, linux-image-powerpc64-emb-lts-utopic, linux-image-powerpc-smp-lts-vivid, linux-image-powerpc-e500mc, linux-lts-xenial, linux-image-4.4.0-1150-raspi2, linux-image-aws, linux-image-generic-lpae-lts-vivid, linux-image-4.4.0-1154-snapdragon, linux-image-powerpc64-emb-lts-wily, linux-image-virtual, linux-image-powerpc-e500mc-lts-vivid, linux-image-powerpc64-emb-lts-vivid, linux-image-4.4.0-208-powerpc64-emb, linux-image-4.4.0-1090-aws, linux-image-4.4.0-208-generic-lpae, linux-image-generic-lpae-lts-xenial, linux-image-generic-lts-utopic, linux-raspi2, linux-image-lowlatency-lts-wily, linux-image-raspi2, linux-image-virtual-lts-xenial, linux-kvm, linux-image-powerpc-smp-lts-wily, linux-image-4.4.0-208-powerpc-e500mc, linux-image-4.4.0-208-powerpc-smp
- USN-4948-1: linux-image-5.10.0-1026-oem, linux-image-oem-20.04-edge, linux-image-oem-20.04b, linux-oem-5.10
- USN-5343-1: linux-image-virtual-lts-utopic, linux-modules-4.4.0-1138-aws, linux-lowlatency-lts-vivid, linux-tools-lowlatency-lts-xenial, linux-aws-headers-4.4.0-1102, linux-modules-4.4.0-222-generic, linux-buildinfo-4.4.0-222-generic, linux-image-extra-virtual, linux-tools-lowlatency-lts-vivid, linux-aws-cloud-tools-4.4.0-1138, linux-cloud-tools-lowlatency-lts-wily, linux-image-lowlatency-lts-utopic, linux-image-generic, linux-tools-4.4.0-1102-aws, linux-cloud-tools-4.4.0-1103-kvm, linux-headers-virtual, linux-virtual-lts-utopic, linux-doc, linux-signed-lowlatency, linux-buildinfo-4.4.0-1138-aws, linux-tools-generic-lts-xenial, linux-signed-generic-lts-xenial, linux-tools-virtual-lts-xenial, linux-headers-lowlatency-lts-vivid, linux-tools-generic-lts-wily, linux-image-unsigned-4.4.0-222-generic, linux-tools-generic-lts-utopic, linux-cloud-tools-generic-lts-vivid, linux-headers-virtual-lts-xenial, linux-signed-generic-lts-wily, linux-cloud-tools-generic-lts-xenial, linux-hwe-generic-trusty, linux-image-generic-lts-utopic, linux-signed-image-generic-lts-vivid, linux-lowlatency-lts-utopic, linux-signed-lowlatency-lts-wily, linux-cloud-tools-virtual-lts-vivid, linux-aws-tools-4.4.0-1102, linux-image-virtual-lts-xenial, linux-lts-xenial-cloud-tools-4.4.0-222, linux-image-extra-virtual-lts-utopic, linux-aws-tools-4.4.0-1138, linux-aws, linux-headers-4.4.0-1103-kvm, linux-headers-lowlatency-lts-xenial, linux-headers-generic-lts-vivid, linux-modules-extra-aws, linux-image-kvm, linux-cloud-tools-virtual-lts-xenial, linux-headers-virtual-lts-utopic, linux-headers-virtual-lts-vivid, linux-headers-generic-lts-wily, linux-image-4.4.0-222-lowlatency, linux-image-lowlatency-lts-vivid, linux-tools-4.4.0-222-lowlatency, linux-tools-virtual, linux-cloud-tools-lowlatency-lts-vivid, linux-buildinfo-4.4.0-222-lowlatency, linux-kvm-tools-4.4.0-1103, linux-source-4.4.0, linux-tools-4.4.0-222-generic, linux-tools-virtual-lts-wily, linux-hwe-virtual-trusty, linux-cloud-tools-generic-lts-wily, linux-signed-image-generic-lts-xenial, linux-headers-kvm, linux-modules-4.4.0-1102-aws, linux-image-4.4.0-1102-aws, linux-headers-generic-lts-utopic, linux-crashdump, linux-generic-lts-vivid, linux-tools-aws, linux-image-hwe-virtual-trusty, linux-image-extra-virtual-lts-wily, linux-headers-lowlatency-lts-utopic, linux-image-4.4.0-222-generic, linux-image-extra-virtual-lts-vivid, linux-tools-kvm, linux-cloud-tools-lowlatency-lts-xenial, linux-image-virtual-lts-vivid, linux-generic-lts-wily, linux-tools-host, linux-lowlatency-lts-wily, linux-headers-4.4.0-1138-aws, linux-headers-generic, linux-lowlatency-lts-xenial, linux-headers-4.4.0-222-generic, linux-image-unsigned-4.4.0-222-lowlatency, linux-signed-image-generic-lts-wily, linux-generic-lts-xenial, linux-signed-image-generic, linux-virtual-lts-vivid, linux-image-4.4.0-1103-kvm, linux-tools-virtual-lts-vivid, linux-virtual, linux-image-generic-lts-wily, linux-virtual-lts-wily, linux-image-lowlatency-lts-xenial, linux-image-hwe-generic-trusty, linux-modules-extra-4.4.0-222-generic, linux-image-lowlatency, linux-tools-lts-utopic, linux-cloud-tools-4.4.0-222, linux-modules-extra-4.4.0-1138-aws, linux-tools-4.4.0-1103-kvm, linux-headers-lowlatency, linux-cloud-tools-4.4.0-1138-aws, linux-lowlatency, linux-cloud-tools-generic, linux-cloud-tools-generic-lts-utopic, linux-modules-4.4.0-1103-kvm, linux-cloud-tools-4.4.0-222-generic, linux-kvm-cloud-tools-4.4.0-1103, linux-cloud-tools-4.4.0-222-lowlatency, linux-headers-4.4.0-222, linux-tools-4.4.0-1138-aws, linux-tools-generic, linux-tools-lowlatency, linux-image-lowlatency-lts-wily, linux-signed-generic-lts-vivid, linux-cloud-tools-4.4.0-1102-aws, linux-aws-cloud-tools-4.4.0-1102, linux-cloud-tools-lowlatency, linux-signed-generic, linux-lts-xenial-tools-4.4.0-222, linux-signed-generic-lts-utopic, linux-image-virtual-lts-wily, linux-kvm-headers-4.4.0-1103, linux-image-generic-lts-vivid, linux-tools-lowlatency-lts-wily, linux-image-generic-lts-xenial, linux-signed-lowlatency-lts-xenial, linux-generic, linux-image-extra-virtual-lts-xenial, linux-modules-4.4.0-222-lowlatency, linux-signed-image-generic-lts-utopic, linux-tools-virtual-lts-utopic, linux-cloud-tools-lowlatency-lts-utopic, linux-libc-dev, linux-tools-lowlatency-lts-utopic, linux, linux-headers-generic-lts-xenial, linux-buildinfo-4.4.0-1103-kvm, linux-signed-image-lowlatency-lts-xenial, linux-lts-xenial, linux-cloud-tools-virtual-lts-wily, linux-generic-lts-utopic, linux-image-aws, linux-signed-image-lowlatency, linux-buildinfo-4.4.0-1102-aws, linux-cloud-tools-common, linux-tools-common, linux-image-4.4.0-1138-aws, linux-image-virtual, linux-tools-4.4.0-222, linux-source, linux-virtual-lts-xenial, linux-headers-4.4.0-222-lowlatency, linux-headers-lowlatency-lts-wily, linux-cloud-tools-virtual, linux-headers-aws, linux-headers-4.4.0-1102-aws, linux-aws-headers-4.4.0-1138, linux-cloud-tools-virtual-lts-utopic, linux-kvm, linux-signed-image-lowlatency-lts-wily, linux-headers-virtual-lts-wily, linux-tools-generic-lts-vivid