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Out-of-bounds Write Affecting kernel-rt-kvm package, versions <0:3.10.0-1160.rt56.1131.el7

Severity

high

    Threat Intelligence

    EPSS
    0.05% (18th percentile)

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  • Snyk ID SNYK-CENTOS7-KERNELRTKVM-2178652
  • published 26 Jul 2021
  • disclosed 1 Apr 2020
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Introduced: 1 Apr 2020

CVE-2020-11565 Open this link in a new tab
CWE-787 Open this link in a new tab

How to fix?

Upgrade Centos:7 kernel-rt-kvm to version 0:3.10.0-1160.rt56.1131.el7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-kvm package and not the kernel-rt-kvm package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

An issue was discovered in the Linux kernel through 5.6.2. mpol_parse_str in mm/mempolicy.c has a stack-based out-of-bounds write because an empty nodelist is mishandled during mount option parsing, aka CID-aa9f7d5172fa. NOTE: Someone in the security community disagrees that this is a vulnerability because the issue “is a bug in parsing mount options which can only be specified by a privileged user, so triggering the bug does not grant any powers not already held.”

CVSS Scores

version 3.1
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Snyk

6 high
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    High
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    High
  • Availability (A)
    High
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NVD

6 medium
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Red Hat

6 medium