CVE-2024-56708 EDAC/igen6: Avoid segmentation fault on module unload
A double free vulnerability in the Linux kernel EDAC driver causes a segmentation fault during module unload, leading to a denial of service.
- 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-2024-56708?
CVE-2024-56708 is a high-severity use after free 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:
EDAC/igen6: Avoid segmentation fault on module unload
The segmentation fault happens because:
During modprobe: 1. In igen6_probe(), igen6_pvt will be allocated with kzalloc() 2. In igen6_register_mci(), mci->pvt_info will point to &igen6_pvt->imc[mc]
During rmmod: 1. In mci_release() in edac_mc.c, it will kfree(mci->pvt_info) 2. In igen6_remove(), it will kfree(igen6_pvt);
Fix this issue by setting mci->pvt_info to NULL to avoid the double kfree.
Weakness: CWE-415
Which versions are affected by CVE-2024-56708?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-56708?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2024-56708 being exploited?
There is no known exploitation of CVE-2024-56708 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-56708, DEBIAN-CVE-2024-56708, GHSA-2c9f-4h7m-wqr9, UBUNTU-CVE-2024-56708.