<p>Upgrade <code>RHEL:8</code> <code>kernel-debug-modules</code> to version 0:4.18.0-305.el8 or higher.<br>This issue was patched in <code>RHSA-2021:1578</code>.</p>

Use After Free Affecting kernel-debug-modules package, versions <0:4.18.0-305.el8

Threat Intelligence

0.06% (25^th percentile)

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Snyk ID SNYK-RHEL8-KERNELDEBUGMODULES-3965861
published 1 Aug 2022
disclosed 21 Mar 2020

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Introduced: 21 Mar 2020

CVE-2020-36557 Open this link in a new tab CWE-416 Open this link in a new tab

How to fix?

Upgrade RHEL:8 kernel-debug-modules to version 0:4.18.0-305.el8 or higher.
This issue was patched in RHSA-2021:1578.

NVD Description

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

A race condition in the Linux kernel before 5.6.2 between the VT_DISALLOCATE ioctl and closing/opening of ttys could lead to a use-after-free.

References

CVSS Scores

version 3.1

Attack Vector (AV)

Local
Attack Complexity (AC)

High
Privileges Required (PR)

None
User Interaction (UI)

None

Scope (S)

Unchanged

Confidentiality (C)

None
Integrity (I)

None
Availability (A)

High

Use After Free Affecting kernel-debug-modules package, versions <0:4.18.0-305.el8

Severity

Based on Red Hat Enterprise Linux security rating