CVE-2024-56737 Memory corruption in GRUB2
A heap-based buffer overflow in GNU GRUB allows attackers to execute arbitrary code or escalate privileges via a crafted HFS filesystem.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2024-56737?
CVE-2024-56737 is a high-severity memory corruption vulnerability in GNU GRUB2, published on 29 Dec 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
GNU GRUB (aka GRUB2) through 2.12 has a heap-based buffer overflow in fs/hfs.c via crafted sblock data in an HFS filesystem.
Weakness: CWE-122
Which versions are affected by CVE-2024-56737?
It affects 1 product.
Products include Gnu Grub2.
How do I fix CVE-2024-56737?
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-2024-56737 being exploited?
There is no known exploitation of CVE-2024-56737 in the wild and no public exploit code.
Other vulnerabilities in GNU 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)
- CVE-2025-0678 Grub2: squash4: integer overflow may lead to heap based out-of-bounds write when reading data
Sources
Also known as AZL-54683, AZL-54712, BELL-CVE-2024-56737, DEBIAN-CVE-2024-56737, GHSA-9vr3-263w-c6mj, UBUNTU-CVE-2024-56737.