CVE-2022-48787 iwlwifi: fix use-after-free
A use-after-free vulnerability in the iwlwifi driver allows attackers to cause denial of service or potentially execute code when firmware is missing.
- 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-2022-48787?
CVE-2022-48787 is a high-severity use after free vulnerability in Linux kernel, published on 16 Jul 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:
iwlwifi: fix use-after-free
If no firmware was present at all (or, presumably, all of the firmware files failed to parse), we end up unbinding by calling device_release_driver(), which calls remove(), which then in iwlwifi calls iwl_drv_stop(), freeing the 'drv' struct. However the new code I added will still erroneously access it after it was freed.
Set 'failure=false' in this case to avoid the access, all data was already freed anyway.
Weakness: CWE-416
Which versions are affected by CVE-2022-48787?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-48787?
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-2022-48787 being exploited?
There is no known exploitation of CVE-2022-48787 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-48787, GHSA-w5j3-3j83-3j22, UBUNTU-CVE-2022-48787.