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CVE-2022-28736

Date: July 19, 2023

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.

Severity Score

Related Resources (8)

https://nvd.nist.gov/vuln/detail/CVE-2022-28736
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28736
https://www.openwall.com/lists/oss-security/2022/06/07/5
https://people.canonical.com/~ubuntu-security/cve/CVE-2022-28736
https://access.redhat.com/security/cve/CVE-2022-28736
https://security.netapp.com/advisory/ntap-20230825-0002/
https://security-tracker.debian.org/tracker/CVE-2022-28736
https://www.mend.io/vulnerability-database/CVE-2022-28736

Severity Score

Weakness Type (CWE)

Use After Free

CWE-416

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): HIGH
Privileges Required (PR): HIGH
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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