vulnerability
Gentoo Linux: CVE-2022-28736: GRUB: Multiple Vulnerabilities
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 6 | (AV:L/AC:M/Au:M/C:C/I:C/A:C) | Sep 25, 2022 | Sep 26, 2022 | Aug 13, 2025 |
Severity
6
CVSS
(AV:L/AC:M/Au:M/C:C/I:C/A:C)
Published
Sep 25, 2022
Added
Sep 26, 2022
Modified
Aug 13, 2025
Description
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.
Solution
gentoo-linux-upgrade-sys-boot-grub
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