vulnerability

Arch Linux: Arbitrary code execution (CVE-2022-28736)

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Severity
6
CVSS
(AV:L/AC:M/Au:M/C:C/I:C/A:C)
Published
Jul 20, 2023
Added
Jul 11, 2025
Modified
Jan 16, 2026

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

arch-linux-upgrade-latest

References

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