VULNERABILITY INTELLIGENCE
CVE-2020-15706
CVSS score6.4 MEDIUM
EPSS probability0.98%
CISA KEVNot currently listed
Published2020-07-29
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Description
GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and prior versions.
Weakness classification
- security@ubuntu.com: CWE-362
- nvd@nist.gov: CWE-362
Primary references
- security@ubuntu.com — Broken Link, Mailing List, Third Party Advisory
- security@ubuntu.com — Broken Link, Mailing List, Third Party Advisory
- security@ubuntu.com — Third Party Advisory
- security@ubuntu.com — Mailing List, Third Party Advisory
- security@ubuntu.com — Third Party Advisory
- security@ubuntu.com — Issue Tracking, Vendor Advisory
- security@ubuntu.com — Patch, Third Party Advisory, Vendor Advisory
- security@ubuntu.com — Third Party Advisory
- security@ubuntu.com — Third Party Advisory
- security@ubuntu.com — Third Party Advisory
- security@ubuntu.com — Third Party Advisory
- security@ubuntu.com — Third Party Advisory