CVE-2024-57256 Integer overflow in U-Boot
An integer overflow in U-Boot's ext4 symlink handling allows attackers to trigger memory overwrites via crafted filesystems, potentially leading to code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-57256?
CVE-2024-57256 is a high-severity vulnerability in denx U-Boot, published on 18 Feb 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An integer overflow in ext4fs_read_symlink in Das U-Boot before 2025.01-rc1 occurs for zalloc (adding one to an le32 variable) via a crafted ext4 filesystem with an inode size of 0xffffffff, resulting in a malloc of zero and resultant memory overwrite.
Weakness: CWE-190
Which versions are affected by CVE-2024-57256?
It affects 1 product.
Products include Denx U-Boot.
How do I fix CVE-2024-57256?
Upgrade to a fixed version.
Is CVE-2024-57256 being exploited?
There is no known exploitation of CVE-2024-57256 in the wild and no public exploit code.
Other vulnerabilities in denx U-Boot
Sources
Also known as DEBIAN-CVE-2024-57256, GHSA-vmjq-93g5-fvqc, UBUNTU-CVE-2024-57256.