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Red Hat: CVE-2021-31440: local escalation of privileges in handling of eBPF programs (Multiple Advisories)

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Red Hat: CVE-2021-31440: local escalation of privileges in handling of eBPF programs (Multiple Advisories)

Severity
7
CVSS
(AV:L/AC:M/Au:N/C:C/I:C/A:C)
Published
05/21/2021
Created
11/11/2021
Added
11/10/2021
Modified
03/13/2024

Description

This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel 5.11.15. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of eBPF programs. The issue results from the lack of proper validation of user-supplied eBPF programs prior to executing them. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel. Was ZDI-CAN-13661.

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

References

  • CVE-2021-31440
  • RHSA-2021:4140
  • RHSA-2021:4356

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