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Use After Free Affecting kernel-debug-core package, versions <0:4.18.0-193.el8

Severity

 Recommended
high

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    0.07% (34th percentile)

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  • Snyk ID SNYK-RHEL8-KERNELDEBUGCORE-3745330
  • published 26 Jul 2021
  • disclosed 13 Jun 2019
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Introduced: 13 Jun 2019

CVE-2019-12819 Open this link in a new tab
CWE-416 Open this link in a new tab

How to fix?

Upgrade RHEL:8 kernel-debug-core to version 0:4.18.0-193.el8 or higher.
This issue was patched in RHSA-2020:1769.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-debug-core package and not the kernel-debug-core 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 before 5.0. The function __mdiobus_register() in drivers/net/phy/mdio_bus.c calls put_device(), which will trigger a fixed_mdio_bus_init use-after-free. This will cause a denial of service.