<p>Upgrade <code>RHEL:8</code> <code>kernel-cross-headers</code> to version 0:4.18.0-240.el8 or higher.<br>This issue was patched in <code>RHSA-2020:4431</code>.</p>

Out-of-bounds Write Affecting kernel-cross-headers package, versions <0:4.18.0-240.el8

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0.05% (20^th percentile)

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Snyk ID SNYK-RHEL8-KERNELCROSSHEADERS-3855081
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 RHEL:8 kernel-cross-headers to version 0:4.18.0-240.el8 or higher.
This issue was patched in RHSA-2020:4431.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-cross-headers package and not the kernel-cross-headers package as distributed by RHEL. See How to fix? for RHEL:8 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.”

References

CVSS Scores

version 3.1

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