CVE-2023-52479 ksmbd: fix uaf in smb20_oplock_break_ack
A use-after-free vulnerability in the Linux kernel's ksmbd module allows attackers to potentially execute code or escalate privileges.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-52479?
CVE-2023-52479 is a high-severity use after free vulnerability in Linux kernel, published on 29 Feb 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: fix uaf in smb20_oplock_break_ack
drop reference after use opinfo.
Weakness: CWE-416
Which versions are affected by CVE-2023-52479?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-52479?
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-2023-52479 being exploited?
There is no known exploitation of CVE-2023-52479 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2023-52479, DEBIAN-CVE-2023-52479, GHSA-cf5h-fpjr-xpm5, UBUNTU-CVE-2023-52479.