Out-of-bounds Write Affecting kernel-rt-debug-kvm package, versions <0:4.18.0-305.3.1.rt7.75.el8_4


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (15th percentile)

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  • Snyk IDSNYK-RHEL8-KERNELRTDEBUGKVM-4038569
  • published26 Jul 2021
  • disclosed13 Apr 2021

Introduced: 13 Apr 2021

CVE-2021-3501  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade RHEL:8 kernel-rt-debug-kvm to version 0:4.18.0-305.3.1.rt7.75.el8_4 or higher.
This issue was patched in RHSA-2021:2169.

NVD Description

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

A flaw was found in the Linux kernel in versions before 5.12. The value of internal.ndata, in the KVM API, is mapped to an array index, which can be updated by a user process at anytime which could lead to an out-of-bounds write. The highest threat from this vulnerability is to data integrity and system availability.

CVSS Scores

version 3.1