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Ubuntu: (Multiple Advisories) (CVE-2021-4001): Linux kernel (OEM) vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2021-4001): Linux kernel (OEM) vulnerabilities

Severity
5
CVSS
(AV:L/AC:M/Au:N/C:N/I:C/A:N)
Published
01/05/2022
Created
01/08/2022
Added
01/06/2022
Modified
10/06/2023

Description

A race condition was found in the Linux kernel's ebpf verifier between bpf_map_update_elem and bpf_map_freeze due to a missing lock in kernel/bpf/syscall.c. In this flaw, a local user with a special privilege (cap_sys_admin or cap_bpf) can modify the frozen mapped address space. This flaw affects kernel versions prior to 5.16 rc2.

Solution(s)

  • ubuntu-upgrade-linux-image-5-10-0-1053-oem
  • ubuntu-upgrade-linux-image-5-11-0-1028-azure
  • ubuntu-upgrade-linux-image-5-11-0-1028-oracle
  • ubuntu-upgrade-linux-image-5-11-0-1029-gcp
  • ubuntu-upgrade-linux-image-5-13-0-1011-kvm
  • ubuntu-upgrade-linux-image-5-13-0-1012-aws
  • ubuntu-upgrade-linux-image-5-13-0-1013-gcp
  • ubuntu-upgrade-linux-image-5-13-0-1016-oracle
  • ubuntu-upgrade-linux-image-5-13-0-1016-raspi
  • ubuntu-upgrade-linux-image-5-13-0-1016-raspi-nolpae
  • ubuntu-upgrade-linux-image-5-13-0-1029-oem
  • ubuntu-upgrade-linux-image-5-13-0-28-generic
  • ubuntu-upgrade-linux-image-5-13-0-28-generic-64k
  • ubuntu-upgrade-linux-image-5-13-0-28-generic-lpae
  • ubuntu-upgrade-linux-image-5-13-0-28-lowlatency
  • ubuntu-upgrade-linux-image-5-14-0-1022-oem
  • ubuntu-upgrade-linux-image-5-4-0-1023-iot
  • ubuntu-upgrade-linux-image-5-4-0-1031-xilinx-zynqmp
  • ubuntu-upgrade-linux-image-5-4-0-1058-ibm
  • ubuntu-upgrade-linux-image-5-4-0-1072-bluefield
  • ubuntu-upgrade-linux-image-5-4-0-1078-gkeop
  • ubuntu-upgrade-linux-image-5-4-0-1095-raspi
  • ubuntu-upgrade-linux-image-5-4-0-1100-kvm
  • ubuntu-upgrade-linux-image-5-4-0-1110-oracle
  • ubuntu-upgrade-linux-image-5-4-0-1111-aws
  • ubuntu-upgrade-linux-image-5-4-0-1115-gcp
  • ubuntu-upgrade-linux-image-5-4-0-1117-azure
  • ubuntu-upgrade-linux-image-5-4-0-164-generic
  • ubuntu-upgrade-linux-image-5-4-0-164-generic-lpae
  • ubuntu-upgrade-linux-image-5-4-0-164-lowlatency
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-aws-lts-20-04
  • ubuntu-upgrade-linux-image-azure
  • ubuntu-upgrade-linux-image-azure-lts-20-04
  • ubuntu-upgrade-linux-image-bluefield
  • 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-20-04
  • ubuntu-upgrade-linux-image-gke
  • ubuntu-upgrade-linux-image-gkeop
  • ubuntu-upgrade-linux-image-gkeop-5-4
  • ubuntu-upgrade-linux-image-ibm
  • ubuntu-upgrade-linux-image-ibm-lts-20-04
  • 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-20-04c
  • ubuntu-upgrade-linux-image-oem-20-04d
  • 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
  • ubuntu-upgrade-linux-image-xilinx-zynqmp

References

  • https://attackerkb.com/topics/cve-2021-4001
  • CVE - 2021-4001
  • CVE-2021-4001
  • USN-5207-1
  • USN-5265-1
  • USN-5266-1
  • USN-5278-1
  • USN-5294-1
  • USN-5294-2
  • USN-5295-1
  • USN-5295-2
  • USN-5297-1
  • USN-5298-1
  • USN-5337-1
  • USN-5338-1
  • USN-5339-1
  • USN-5343-1
  • USN-5361-1
  • USN-5362-1
  • USN-5368-1
  • USN-5377-1
  • USN-5385-1
  • USN-5413-1
  • USN-5415-1
  • USN-5467-1
  • USN-6417-1
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