A flaw was found in grub2 in versions prior to 2.06. The rmmod implementation allows the unloading of a module used as a dependency without checking if any other dependent module is still loaded leading to a use-after-free scenario. This could allow arbitrary code to be executed or a bypass of Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
| Reporter | Title | Published | Views | Family All 223 |
|---|---|---|---|---|
 | Amazon Linux 2 : grub2 (ALAS-2021-1684) | 16 Jul 202100:00 | – | nessus |
| Alibaba Cloud Linux 3 : 0026: grub2 (ALINUX3-SA-2021:0026) | 14 May 202500:00 | – | nessus |
| Alibaba Cloud Linux 3 : 0048: fwupd (ALINUX3-SA-2021:0048) | 14 May 202500:00 | – | nessus |
| AlmaLinux 8 : grub2 (ALSA-2021:0696) | 9 Feb 202200:00 | – | nessus |
| AlmaLinux 8 : shim (ALSA-2021:1734) | 9 Feb 202200:00 | – | nessus |
| AlmaLinux 8 : fwupd (ALSA-2021:2566) | 9 Feb 202200:00 | – | nessus |
| CentOS 8 : grub2 (CESA-2021:0696) | 3 Mar 202100:00 | – | nessus |
| CentOS 8 : fwupd (CESA-2021:2566) | 3 Jul 202100:00 | – | nessus |
| CentOS 9 : shim-unsigned-x64-15.6-1.el9 | 29 Feb 202400:00 | – | nessus |
| CentOS 7 : grub2 (RHSA-2021:0699) | 9 Oct 202400:00 | – | nessus |
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16 Dec 2021 08:00Current
8.2High risk
Vulners AI Score8.2
CVSS 27.2
CVSS 3.18.2
EPSS0.01152