6.4
Moyenne
CVE-2026-97876 A local attacker with control over GRUB's configuration can bypass lockdown restrictions when booting with Secure Boot…
Description
A local attacker with control over GRUB's configuration can bypass lockdown restrictions when booting with Secure Boot and load an unsigned GRUB module, while GRUB continues to report lockdown is enabled. The vulnerability is caused by insufficient validation of the MMIO base address passed to the GRUB serial command. GRUB does not validate that the base address corresponds to a UART device, rather than being an arbitrary memory address. This allows an attacker to trick GRUB into writing non-arbitrary data at an attacker-controlled address, including resetting the grub_file_verifiers list in a way that disables the subsequent verification of loaded modules.
Produits et versions touchés
| Produit | Versions touchées | Corrigé en |
|---|---|---|
| GRUB2 2.12 | 2.12 → < 2.16 | 2.16 |
Références
- www.openwall.com www.openwall.com
- gitlab.freedesktop.org gitlab.freedesktop.org
Chronologie
- Publiée
- Dernière modification
Autres CVE de GRUB2
Les 10 CVE de GRUB2 →
CVE-2025-54770
Grub2: use-after-free in net_set_vlan
4.9
Moyenne
CVE-2025-61664
Grub2: missing unregister call for normal_exit command may lead to use-after-free
4.9
Moyenne
CVE-2025-61663
Grub2: missing unregister call for normal commands may lead to use-after-free
4.9
Moyenne
CVE-2025-61662
A Use-After-Free vulnerability has been discovered in GRUB's gettext module
7.8
Élevée