CVE-2024-45782 Grub2: fs/hfs: strcpy() using the volume name (fs/hfs.c:382)
A heap-based buffer overflow in GRUB2's HFS driver allows attackers to bypass Secure Boot protections via a crafted volume name.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-45782?
CVE-2024-45782 is a high-severity memory corruption 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 flaw was found in the HFS filesystem. When reading an HFS volume's name at grub_fs_mount(), the HFS filesystem driver performs a strcpy() using the user-provided volume name as input without properly validating the volume name's length. This issue may read to a heap-based out-of-bounds writer, impacting grub's sensitive data integrity and eventually leading to a secure boot protection bypass.
Weakness: CWE-787
Which versions are affected by CVE-2024-45782?
It affects 3 products.
Products include Gnu Grub2, Redhat Enterprise Linux, Redhat Openshift Container Platform.
How do I fix CVE-2024-45782?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2024-45782 being exploited?
There is no known exploitation of CVE-2024-45782 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-2025-0678 Grub2: squash4: integer overflow may lead to heap based out-of-bounds write when reading data
Sources
Also known as AZL-57666, AZL-57691, BELL-CVE-2024-45782, DEBIAN-CVE-2024-45782, GHSA-pgf7-qmfm-349p, UBUNTU-CVE-2024-45782.