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Red Hat: CVE-2021-3600: Moderate: kernel-rt security and bug fix update (Multiple Advisories)

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Red Hat: CVE-2021-3600: Moderate: kernel-rt security and bug fix update (Multiple Advisories)

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
11/09/2021
Created
11/11/2021
Added
11/10/2021
Modified
05/17/2022

Description

A flaw was found in the Linux kernel’s eBPF verification code, where the eBPF 32-bit div/mod source register truncation could lead to out-of-bounds reads and writes. By default, accessing the eBPF verifier is only possible to privileged users with CAP_SYS_ADMIN. This flaw allows a local user who can run eBPF instructions to crash the system or possibly escalate their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Solution(s)

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

References

  • CVE-2021-3600
  • RHSA-2021:4140
  • RHSA-2021:4356

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