VULNERABILITY

Ubuntu: (Multiple Advisories) (CVE-2021-33624): Linux kernel vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2021-33624): Linux kernel vulnerabilities

Severity
5
CVSS
(AV:L/AC:M/Au:N/C:C/I:N/A:N)
Published
06/23/2021
Created
09/30/2021
Added
09/28/2021
Modified
01/23/2025

Description

In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db.

Solution(s)

  • ubuntu-upgrade-linux-image-5-10-0-1050-oem
  • ubuntu-upgrade-linux-image-5-11-0-1017-azure
  • ubuntu-upgrade-linux-image-5-11-0-1017-kvm
  • ubuntu-upgrade-linux-image-5-11-0-1019-aws
  • ubuntu-upgrade-linux-image-5-11-0-1019-oracle
  • ubuntu-upgrade-linux-image-5-11-0-1019-raspi
  • ubuntu-upgrade-linux-image-5-11-0-1019-raspi-nolpae
  • ubuntu-upgrade-linux-image-5-11-0-1020-gcp
  • ubuntu-upgrade-linux-image-5-11-0-37-generic
  • ubuntu-upgrade-linux-image-5-11-0-37-generic-64k
  • ubuntu-upgrade-linux-image-5-11-0-37-generic-lpae
  • ubuntu-upgrade-linux-image-5-11-0-37-lowlatency
  • ubuntu-upgrade-linux-image-5-4-0-1024-gkeop
  • ubuntu-upgrade-linux-image-5-4-0-1044-raspi
  • ubuntu-upgrade-linux-image-5-4-0-1047-kvm
  • ubuntu-upgrade-linux-image-5-4-0-1053-gcp
  • ubuntu-upgrade-linux-image-5-4-0-1053-gke
  • ubuntu-upgrade-linux-image-5-4-0-1055-oracle
  • ubuntu-upgrade-linux-image-5-4-0-1057-aws
  • ubuntu-upgrade-linux-image-5-4-0-1059-azure
  • ubuntu-upgrade-linux-image-5-4-0-87-generic
  • ubuntu-upgrade-linux-image-5-4-0-87-generic-lpae
  • ubuntu-upgrade-linux-image-5-4-0-87-lowlatency
  • ubuntu-upgrade-linux-image-5-4-0-88-generic
  • ubuntu-upgrade-linux-image-5-4-0-88-generic-lpae
  • ubuntu-upgrade-linux-image-5-4-0-88-lowlatency
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-aws-lts-20-04
  • ubuntu-upgrade-linux-image-azure
  • ubuntu-upgrade-linux-image-azure-edge
  • ubuntu-upgrade-linux-image-azure-lts-20-04
  • ubuntu-upgrade-linux-image-gcp
  • ubuntu-upgrade-linux-image-gcp-lts-20-04
  • ubuntu-upgrade-linux-image-generic
  • ubuntu-upgrade-linux-image-generic-64k
  • ubuntu-upgrade-linux-image-generic-64k-hwe-20-04
  • ubuntu-upgrade-linux-image-generic-hwe-18-04
  • ubuntu-upgrade-linux-image-generic-hwe-20-04
  • ubuntu-upgrade-linux-image-generic-lpae
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-18-04
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-20-04
  • ubuntu-upgrade-linux-image-gke
  • ubuntu-upgrade-linux-image-gke-5-4
  • ubuntu-upgrade-linux-image-gkeop
  • ubuntu-upgrade-linux-image-gkeop-5-4
  • ubuntu-upgrade-linux-image-kvm
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-lowlatency-hwe-18-04
  • ubuntu-upgrade-linux-image-lowlatency-hwe-20-04
  • ubuntu-upgrade-linux-image-oem
  • ubuntu-upgrade-linux-image-oem-20-04
  • ubuntu-upgrade-linux-image-oem-20-04b
  • ubuntu-upgrade-linux-image-oem-osp1
  • ubuntu-upgrade-linux-image-oracle
  • ubuntu-upgrade-linux-image-oracle-lts-20-04
  • ubuntu-upgrade-linux-image-raspi
  • ubuntu-upgrade-linux-image-raspi-hwe-18-04
  • ubuntu-upgrade-linux-image-raspi-nolpae
  • ubuntu-upgrade-linux-image-raspi2
  • ubuntu-upgrade-linux-image-snapdragon-hwe-18-04
  • ubuntu-upgrade-linux-image-virtual
  • ubuntu-upgrade-linux-image-virtual-hwe-18-04
  • ubuntu-upgrade-linux-image-virtual-hwe-20-04

References

  • https://attackerkb.com/topics/cve-2021-33624
  • CVE - 2021-33624
  • CVE-2021-33624
  • USN-5091-1
  • USN-5091-2
  • USN-5091-3
  • USN-5092-1
  • USN-5092-2
  • USN-5092-3
  • USN-5094-1
  • USN-5094-2
  • USN-5096-1
  • USN-5113-1
  • USN-5114-1
  • USN-5115-1
  • USN-5116-1
  • USN-5116-2
  • USN-5117-1
  • USN-5120-1
  • USN-5135-1
  • USN-5136-1
  • USN-5137-1
  • USN-5137-2
  • USN-5163-1
  • USN-5164-1
  • USN-5299-1
  • USN-5343-1
  • USN-5361-1
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