CVE-2024-45776 Grub2: grub-core/gettext: integer overflow leads to heap oob write and read.
An integer overflow in GRUB2 allows attackers to execute arbitrary code or bypass Secure Boot via a crafted .mo file.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-45776?
CVE-2024-45776 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 18 Feb 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
When reading the language .mo file in grub_mofile_open(), grub2 fails to verify an integer overflow when allocating its internal buffer. A crafted .mo file may lead the buffer size calculation to overflow, leading to out-of-bound reads and writes. This flaw allows an attacker to leak sensitive data or overwrite critical data, possibly circumventing secure boot protections.
Weakness: CWE-787
Which versions are affected by CVE-2024-45776?
How do I fix CVE-2024-45776?
Apply the vendor's patch.
Is CVE-2024-45776 being exploited?
There is no known exploitation of CVE-2024-45776 in the wild and no public exploit code.
Sources
Also known as AZL-56928, AZL-56989, BELL-CVE-2024-45776, DEBIAN-CVE-2024-45776, GHSA-8852-57vj-5pjq, UBUNTU-CVE-2024-45776.