CVE-2022-28736
Medium
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.
SeverityMedium
CVSS6.4
Exploit probability—
Product
Gnu Grub2
PublishedJul 20, 2023
First seenJul 20, 2023
How to fix
Update
- gnu grub22.06-3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gnu grub2 | 2.00 ≤ v < 2.06-3 | 2.06-3 |
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