Description
The grub2 package before 2.02-0.29 in Red Hat Enterprise Linux (RHEL) 7, when used on UEFI systems, allows local users to bypass intended Secure Boot restrictions and execute non-verified code via a crafted (1) multiboot or (2) multiboot2 module in the configuration file or physically proximate attackers to bypass intended Secure Boot restrictions and execute non-verified code via the (3) boot menu.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | grub2 +3 | 1:2.02-0.29.el7 | RHSA-2015:2401 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | grub2 +3 | 1:2.02-0.29.0.1.el7 | ELSA-2015-2401 |
Advisories 2
- RHSA-2015:2401 Red Hat Security Advisory: grub2 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- ELSA-2015-2401 Low: grub2 security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 23, 2015
References
- 77983 vdb-entry
- FEDORA-2015-2c155d7632 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1264103
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- RHSA-2015:2401 vendor-advisory
- FEDORA-2015-c3b4fef3af vendor-advisory
- 1034198 vdb-entry