CVE-2024-45779 Grub2: fs/bfs: integer overflow leads to heap oob read in the bfs parser
An integer overflow in the GRUB2 BFS parser allows attackers to leak sensitive data or crash the system via a crafted filesystem.
- 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-2024-45779?
CVE-2024-45779 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 3 Mar 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An integer overflow flaw was found in the BFS file system driver in grub2. When reading a file with an indirect extent map, grub2 fails to validate the number of extent entries to be read. A crafted or corrupted BFS filesystem may cause an integer overflow during the file reading, leading to a heap of bounds read. As a consequence, sensitive data may be leaked, or grub2 will crash.
Weakness: CWE-190
Which versions are affected by CVE-2024-45779?
It affects 1 product.
Products include Gnu Grub2.
How do I fix CVE-2024-45779?
Apply the vendor's patch.
Is CVE-2024-45779 being exploited?
There is no known exploitation of CVE-2024-45779 in the wild and no public exploit code.
Other vulnerabilities in Red Hat Enterprise Linux 10
- CVE-2024-56737 Memory corruption in GRUB2
- CVE-2022-28733 Integer underflow in grub_net_recv_ip4_packets
- CVE-2022-28734 Out-of-bounds write when handling split HTTP headers
- CVE-2025-61662 Grub2: missing unregister call for gettext command may lead to use-after-free
- CVE-2024-45782 Grub2: fs/hfs: strcpy() using the volume name (fs/hfs.c:382)
Sources
Also known as AZL-57498, AZL-57552, BELL-CVE-2024-45779, DEBIAN-CVE-2024-45779, GHSA-qg4m-5hg4-34vq, UBUNTU-CVE-2024-45779.