CVE-2023-52530 wifi: mac80211: fix potential key use-after-free
A use-after-free in the Linux kernel Wi-Fi subsystem allows attackers to potentially execute code or cause a denial of service via specific rekey operations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-52530?
CVE-2023-52530 is a high-severity use after free vulnerability in Linux kernel, published on 2 Mar 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:
wifi: mac80211: fix potential key use-after-free
When ieee80211_key_link() is called by ieee80211_gtk_rekey_add() but returns 0 due to KRACK protection (identical key reinstall), ieee80211_gtk_rekey_add() will still return a pointer into the key, in a potential use-after-free. This normally doesn't happen since it's only called by iwlwifi in case of WoWLAN rekey offload which has its own KRACK protection, but still better to fix, do that by returning an error code and converting that to success on the cfg80211 boundary only, leaving the error for bad callers of ieee80211_gtk_rekey_add().
Weakness: CWE-416
Which versions are affected by CVE-2023-52530?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-52530?
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-2023-52530 being exploited?
There is no known exploitation of CVE-2023-52530 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2023-52530, DEBIAN-CVE-2023-52530, GHSA-w2hj-8f47-3gw5, UBUNTU-CVE-2023-52530.