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.
NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.
|Base Score:||8.2||Base Metrics:||AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H|
|Access Vector:||Local network||Attack Complexity:||Low|
|Privileges Required:||High||User Interaction:||None|
|Integrity Impact:||High||Availability Impact:||High|
|Oracle Linux version 7 (grub2)||ELSA-2021-0699||2021-03-05|
|Oracle Linux version 7 (grub2)||ELSA-2021-9076||2021-03-02|
|Oracle Linux version 8 (grub2)||ELSA-2021-0696||2021-03-05|
|Oracle Linux version 8 (grub2)||ELSA-2021-9077||2021-03-02|
This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team