- Vulnerability/
- USN-5091-1
28/9/2021
USN-5091-1: Linux kernel vulnerabilities
First published: Tue Sep 28 2021(Updated: )
Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk discovered that the BPF verifier in the Linux kernel missed possible mispredicted branches due to type confusion, allowing a side-channel attack. An attacker could use this to expose sensitive information. (CVE-2021-33624) It was discovered that the tracing subsystem in the Linux kernel did not properly keep track of per-cpu ring buffer state. A privileged attacker could use this to cause a denial of service. (CVE-2021-3679) Alexey Kardashevskiy discovered that the KVM implementation for PowerPC systems in the Linux kernel did not properly validate RTAS arguments in some situations. An attacker in a guest vm could use this to cause a denial of service (host OS crash) or possibly execute arbitrary code. (CVE-2021-37576) It was discovered that the Virtio console implementation in the Linux kernel did not properly validate input lengths in some situations. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2021-38160) Michael Wakabayashi discovered that the NFSv4 client implementation in the Linux kernel did not properly order connection setup operations. An attacker controlling a remote NFS server could use this to cause a denial of service on the client. (CVE-2021-38199) It was discovered that the MAX-3421 host USB device driver in the Linux kernel did not properly handle device removal events. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2021-38204)
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| ubuntu/linux-image-5.4.0-88-lowlatency | <5.4.0-88.99 | 5.4.0-88.99 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-gkeop | <5.4.0.1024.27 | 5.4.0.1024.27 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-virtual | <5.4.0.88.92 | 5.4.0.88.92 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-5.4.0-88-generic-lpae | <5.4.0-88.99 | 5.4.0-88.99 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-generic | <5.4.0.88.92 | 5.4.0.88.92 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-oem | <5.4.0.88.92 | 5.4.0.88.92 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-oem-osp1 | <5.4.0.88.92 | 5.4.0.88.92 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-5.4.0-1057-aws | <5.4.0-1057.60 | 5.4.0-1057.60 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-azure-lts-20.04 | <5.4.0.1059.57 | 5.4.0.1059.57 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-5.4.0-88-generic | <5.4.0-88.99 | 5.4.0-88.99 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-5.4.0-1053-gke | <5.4.0-1053.56 | 5.4.0-1053.56 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-gkeop-5.4 | <5.4.0.1024.27 | 5.4.0.1024.27 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-5.4.0-1059-azure | <5.4.0-1059.62 | 5.4.0-1059.62 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-5.4.0-1024-gkeop | <5.4.0-1024.25 | 5.4.0-1024.25 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-gcp-lts-20.04 | <5.4.0.1053.63 | 5.4.0.1053.63 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-aws-lts-20.04 | <5.4.0.1057.60 | 5.4.0.1057.60 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-5.4.0-1055-oracle | <5.4.0-1055.59 | 5.4.0-1055.59 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-5.4.0-1047-kvm | <5.4.0-1047.49 | 5.4.0-1047.49 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-generic-lpae | <5.4.0.88.92 | 5.4.0.88.92 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-oracle-lts-20.04 | <5.4.0.1055.55 | 5.4.0.1055.55 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-gke | <5.4.0.1053.63 | 5.4.0.1053.63 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-kvm | <5.4.0.1047.46 | 5.4.0.1047.46 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-gke-5.4 | <5.4.0.1053.63 | 5.4.0.1053.63 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-5.4.0-1053-gcp | <5.4.0-1053.57 | 5.4.0-1053.57 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-lowlatency | <5.4.0.88.92 | 5.4.0.88.92 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-5.4.0-87-lowlatency | <5.4.0-87.98~18.04.1 | 5.4.0-87.98~18.04.1 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-generic-hwe-18.04 | <5.4.0.87.98~18.04.78 | 5.4.0.87.98~18.04.78 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-snapdragon-hwe-18.04 | <5.4.0.87.98~18.04.78 | 5.4.0.87.98~18.04.78 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-oem | <5.4.0.87.98~18.04.78 | 5.4.0.87.98~18.04.78 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-aws | <5.4.0.1057.40 | 5.4.0.1057.40 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-5.4.0-87-generic-lpae | <5.4.0-87.98~18.04.1 | 5.4.0-87.98~18.04.1 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-oem-osp1 | <5.4.0.87.98~18.04.78 | 5.4.0.87.98~18.04.78 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-5.4.0-1057-aws | <5.4.0-1057.60~18.04.1 | 5.4.0-1057.60~18.04.1 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-generic-lpae-hwe-18.04 | <5.4.0.87.98~18.04.78 | 5.4.0.87.98~18.04.78 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-5.4.0-1059-azure | <5.4.0-1059.62~18.04.1 | 5.4.0-1059.62~18.04.1 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-gkeop-5.4 | <5.4.0.1024.25~18.04.25 | 5.4.0.1024.25~18.04.25 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-azure | <5.4.0.1059.39 | 5.4.0.1059.39 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-5.4.0-1024-gkeop | <5.4.0-1024.25~18.04.1 | 5.4.0-1024.25~18.04.1 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-virtual-hwe-18.04 | <5.4.0.87.98~18.04.78 | 5.4.0.87.98~18.04.78 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-5.4.0-1055-oracle | <5.4.0-1055.59~18.04.1 | 5.4.0-1055.59~18.04.1 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-gcp | <5.4.0.1053.39 | 5.4.0.1053.39 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-oracle | <5.4.0.1055.59~18.04.35 | 5.4.0.1055.59~18.04.35 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-lowlatency-hwe-18.04 | <5.4.0.87.98~18.04.78 | 5.4.0.87.98~18.04.78 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-gke-5.4 | <5.4.0.1053.56~18.04.18 | 5.4.0.1053.56~18.04.18 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-5.4.0-1053-gke | <5.4.0-1053.56~18.04.1 | 5.4.0-1053.56~18.04.1 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-5.4.0-87-generic | <5.4.0-87.98~18.04.1 | 5.4.0-87.98~18.04.1 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-5.4.0-1053-gcp | <5.4.0-1053.57~18.04.1 | 5.4.0-1053.57~18.04.1 |
| =18.04 |
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Reference Links
- https://ubuntu.com/security/CVE-2021-38160
- https://ubuntu.com/security/CVE-2021-3679
- https://ubuntu.com/security/CVE-2021-38199
- https://ubuntu.com/security/CVE-2021-33624
- https://ubuntu.com/security/CVE-2021-38204
- https://ubuntu.com/security/CVE-2021-37576
- https://ubuntu.com/security/notices/USN-5073-1
- https://ubuntu.com/security/notices/USN-5073-2
- https://ubuntu.com/security/notices/USN-5073-3
- https://ubuntu.com/security/notices/USN-5092-1
- https://ubuntu.com/security/notices/USN-5092-2
- https://ubuntu.com/security/notices/USN-5096-1
- https://ubuntu.com/security/notices/USN-5091-2
- https://ubuntu.com/security/notices/USN-5106-1
- https://ubuntu.com/security/notices/USN-5343-1
- https://ubuntu.com/security/notices/USN-5094-1
- https://ubuntu.com/security/notices/USN-5094-2
- https://ubuntu.com/security/notices/USN-5115-1
- https://ubuntu.com/security/notices/USN-5299-1
- https://ubuntu.com/security/notices/USN-5120-1
- https://ubuntu.com/security/notices/USN-5136-1
- https://launchpad.net/ubuntu/+source/linux-signed/5.4.0-88.99
- https://launchpad.net/ubuntu/+source/linux-meta-gkeop/5.4.0.1024.27
- https://launchpad.net/ubuntu/+source/linux-meta/5.4.0.88.92
- https://launchpad.net/ubuntu/+source/linux/5.4.0-88.99
- https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1057.60
- https://launchpad.net/ubuntu/+source/linux-meta-azure/5.4.0.1059.57
- https://launchpad.net/ubuntu/+source/linux-signed-gke/5.4.0-1053.56
- https://launchpad.net/ubuntu/+source/linux-signed-azure/5.4.0-1059.62
- https://launchpad.net/ubuntu/+source/linux-signed-gkeop/5.4.0-1024.25
- https://launchpad.net/ubuntu/+source/linux-meta-gcp/5.4.0.1053.63
- https://launchpad.net/ubuntu/+source/linux-meta-aws/5.4.0.1057.60
- https://launchpad.net/ubuntu/+source/linux-signed-oracle/5.4.0-1055.59
- https://launchpad.net/ubuntu/+source/linux-signed-kvm/5.4.0-1047.49
- https://launchpad.net/ubuntu/+source/linux-meta-oracle/5.4.0.1055.55
- https://launchpad.net/ubuntu/+source/linux-meta-gke/5.4.0.1053.63
- https://launchpad.net/ubuntu/+source/linux-meta-kvm/5.4.0.1047.46
- https://launchpad.net/ubuntu/+source/linux-signed-gcp/5.4.0-1053.57
- https://launchpad.net/ubuntu/+source/linux-signed-hwe-5.4/5.4.0-87.98~18.04.1
- https://launchpad.net/ubuntu/+source/linux-meta-hwe-5.4/5.4.0.87.98~18.04.78
- https://launchpad.net/ubuntu/+source/linux-meta-aws-5.4/5.4.0.1057.40
- https://launchpad.net/ubuntu/+source/linux-hwe-5.4/5.4.0-87.98~18.04.1
- https://launchpad.net/ubuntu/+source/linux-aws-5.4/5.4.0-1057.60~18.04.1
- https://launchpad.net/ubuntu/+source/linux-signed-azure-5.4/5.4.0-1059.62~18.04.1
- https://launchpad.net/ubuntu/+source/linux-meta-gkeop-5.4/5.4.0.1024.25~18.04.25
- https://launchpad.net/ubuntu/+source/linux-meta-azure-5.4/5.4.0.1059.39
- https://launchpad.net/ubuntu/+source/linux-signed-gkeop-5.4/5.4.0-1024.25~18.04.1
- https://launchpad.net/ubuntu/+source/linux-signed-oracle-5.4/5.4.0-1055.59~18.04.1
- https://launchpad.net/ubuntu/+source/linux-meta-gcp-5.4/5.4.0.1053.39
- https://launchpad.net/ubuntu/+source/linux-meta-oracle-5.4/5.4.0.1055.59~18.04.35
- https://launchpad.net/ubuntu/+source/linux-meta-gke-5.4/5.4.0.1053.56~18.04.18
- https://launchpad.net/ubuntu/+source/linux-signed-gke-5.4/5.4.0-1053.56~18.04.1
- https://launchpad.net/ubuntu/+source/linux-signed-gcp-5.4/5.4.0-1053.57~18.04.1
- https://ubuntu.com/security/notices/USN-5091-1 (Advisory)
Child vulnerabilities
(Contains the following vulnerabilities)
- agent/description
- agent/event
- agent/first-publish-date
- agent/last-modified-date
- agent/references
- agent/severity
- agent/softwarecombine
- agent/tags
- agent/title
- agent/type
- collector/usn
- source/Ubuntu
- anchor-related/USN-5073-1
- anchor-related/USN-5073-2
- anchor-related/USN-5073-3
- anchor-related/USN-5092-1
- anchor-related/USN-5092-2
- anchor-related/USN-5096-1
- anchor-related/USN-5091-2
- anchor-related/USN-5106-1
- anchor-related/USN-5343-1
- anchor-related/USN-5094-1
- anchor-related/USN-5094-2
- anchor-related/USN-5115-1
- anchor-related/USN-5299-1
- anchor-related/USN-5120-1
- anchor-related/USN-5136-1
- agent/software-canonical-lookup
- package-manager/ubuntu
- vendor/ubuntu
- canonical/ubuntu ubuntu
- version/ubuntu ubuntu/20.04
- version/ubuntu ubuntu/18.04