CVE-2024-56681 crypto: bcm - add error check in the ahash_hmac_init function
A missing error check in the Linux kernel's Broadcom crypto driver can lead to a null pointer dereference and system crash.
- 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-2024-56681?
CVE-2024-56681 is a high-severity vulnerability in Linux kernel, published on 28 Dec 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
crypto: bcm - add error check in the ahash_hmac_init function
The ahash_init functions may return fails. The ahash_hmac_init should not return ok when ahash_init returns error. For an example, ahash_init will return -ENOMEM when allocation memory is error.
Which versions are affected by CVE-2024-56681?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-56681?
Apply the vendor's patch.
Is CVE-2024-56681 being exploited?
There is no known exploitation of CVE-2024-56681 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-56681, DEBIAN-CVE-2024-56681, GHSA-c5v3-r759-x9gj, UBUNTU-CVE-2024-56681.