CVE-2022-49455 misc: ocxl: fix possible double free in ocxl_file_register_afu
A double free vulnerability in the Linux kernel's ocxl driver allows attackers to cause denial of service or potentially execute arbitrary 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-2022-49455?
CVE-2022-49455 is a high-severity use after free vulnerability in Linux kernel, published on 26 Feb 2025. 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:
misc: ocxl: fix possible double free in ocxl_file_register_afu
info_release() will be called in device_unregister() when info->dev's reference count is 0. So there is no need to call ocxl_afu_put() and kfree() again.
Fix this by adding free_minor() and return to err_unregister error path.
Weakness: CWE-415
Which versions are affected by CVE-2022-49455?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49455?
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-2022-49455 being exploited?
There is no known exploitation of CVE-2022-49455 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49455, GHSA-jpj2-8x9f-59j6, UBUNTU-CVE-2022-49455.