Out-of-bounds Read Affecting kernel-rt-devel package, versions <0:4.18.0-348.rt7.130.el8


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-RHEL8-KERNELRTDEVEL-4105643
  • published26 Jul 2021
  • disclosed23 Jun 2021

Introduced: 23 Jun 2021

CVE-2021-3600  (opens in a new tab)
CWE-125  (opens in a new tab)
CWE-787  (opens in a new tab)
First added by Snyk

How to fix?

Upgrade RHEL:8 kernel-rt-devel to version 0:4.18.0-348.rt7.130.el8 or higher.
This issue was patched in RHSA-2021:4140.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-devel package and not the kernel-rt-devel package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

It was discovered that the eBPF implementation in the Linux kernel did not properly track bounds information for 32 bit registers when performing div and mod operations. A local attacker could use this to possibly execute arbitrary code.

CVSS Scores

version 3.1