CVE-2024-35863 smb: client: fix potential UAF in is_valid_oplock_break()
A use-after-free vulnerability in the Linux kernel SMB client allows attackers to potentially execute code or cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-35863?
CVE-2024-35863 is a critical use after free vulnerability in Linux kernel, published on 19 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix potential UAF in is_valid_oplock_break()
Skip sessions that are being teared down (status == SES_EXITING) to avoid UAF.
Weakness: CWE-416
Which versions are affected by CVE-2024-35863?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-35863?
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-2024-35863 being exploited?
There is no known exploitation of CVE-2024-35863 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-54696, BELL-CVE-2024-35863, DEBIAN-CVE-2024-35863, GHSA-vpq4-gmw2-wmqg, ROOT-OS-DEBIAN-11-CVE-2024-35863, ROOT-OS-UBUNTU-2204-CVE-2024-35863 and 1 more.