CVE-2023-52667 net/mlx5e: fix a potential double-free in fs_any_create_groups
A double-free vulnerability in the Linux kernel's mlx5e network driver allows attackers to cause denial of service or potentially execute code.
- 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-2023-52667?
CVE-2023-52667 is a high-severity use after free vulnerability in Linux kernel, published on 17 May 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:
net/mlx5e: fix a potential double-free in fs_any_create_groups
When kcalloc() for ft->g succeeds but kvzalloc() for in fails, fs_any_create_groups() will free ft->g. However, its caller fs_any_create_table() will free ft->g again through calling mlx5e_destroy_flow_table(), which will lead to a double-free. Fix this by setting ft->g to NULL in fs_any_create_groups().
Weakness: CWE-415
Which versions are affected by CVE-2023-52667?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-52667?
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-2023-52667 being exploited?
There is no known exploitation of CVE-2023-52667 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2023-52667, DEBIAN-CVE-2023-52667, GHSA-7xf4-2cch-q53v, UBUNTU-CVE-2023-52667.