CVE-2024-45778 Grub2: fs/bfs: integer overflow in the bfs parser.
A crafted BFS filesystem triggers an integer overflow in GRUB2, causing a crash and denial of service during boot.
- 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-2024-45778?
CVE-2024-45778 is a medium-severity vulnerability in Redhat Enterprise Linux, 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
A stack overflow flaw was found when reading a BFS file system. A crafted BFS filesystem may lead to an uncontrolled loop, causing grub2 to crash.
Weakness: CWE-190
Which versions are affected by CVE-2024-45778?
It affects 3 products.
Products include Gnu Grub2, Redhat Enterprise Linux, Redhat Openshift Container Platform.
How do I fix CVE-2024-45778?
Apply the vendor's patch.
Is CVE-2024-45778 being exploited?
There is no known exploitation of CVE-2024-45778 in the wild and no public exploit code.
Other vulnerabilities in Redhat Enterprise Linux
- 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-57685, AZL-57694, BELL-CVE-2024-45778, DEBIAN-CVE-2024-45778, GHSA-vpmj-h28j-ffpp, UBUNTU-CVE-2024-45778.