Use After Free Affecting grub2-ppc64le-modules package, versions *


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (12th percentile)

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  • Snyk IDSNYK-RHEL7-GRUB2PPC64LEMODULES-2865631
  • published9 Jun 2022
  • disclosed7 Jun 2022

Introduced: 7 Jun 2022

CVE-2022-28736  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:7 grub2-ppc64le-modules.

NVD Description

Note: Versions mentioned in the description apply only to the upstream grub2-ppc64le-modules package and not the grub2-ppc64le-modules package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

There's a use-after-free vulnerability in grub_cmd_chainloader() function; The chainloader command is used to boot up operating systems that doesn't support multiboot and do not have direct support from GRUB2. When executing chainloader more than once a use-after-free vulnerability is triggered. If an attacker can control the GRUB2's memory allocation pattern sensitive data may be exposed and arbitrary code execution can be achieved.

CVSS Scores

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