CVE-2024-45780 Grub2: fs/tar: integer overflow causes heap oob write
A crafted tar file triggers an integer overflow in GRUB2, causing a heap out-of-bounds write that allows attackers to bypass Secure Boot protections.
- 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-2024-45780?
CVE-2024-45780 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
A flaw was found in grub2. When reading tar files, grub2 allocates an internal buffer for the file name. However, it fails to properly verify the allocation against possible integer overflows. It's possible to cause the allocation length to overflow with a crafted tar file, leading to a heap out-of-bounds write. This flaw eventually allows an attacker to circumvent secure boot protections.
Weakness: CWE-787
Which versions are affected by CVE-2024-45780?
It affects 1 product.
Products include Gnu Grub2.
How do I fix CVE-2024-45780?
Apply the vendor's patch.
Is CVE-2024-45780 being exploited?
There is no known exploitation of CVE-2024-45780 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-57492, AZL-57614, BELL-CVE-2024-45780, DEBIAN-CVE-2024-45780, GHSA-xxc4-h4cm-j5r2, UBUNTU-CVE-2024-45780.