CVE-2024-46686 smb/client: avoid dereferencing rdata=NULL in smb2_new_read_req()
A null pointer dereference in the Linux kernel SMB client can cause a denial of service when using RDMA with specific read thresholds.
- 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-2024-46686?
CVE-2024-46686 is a medium-severity vulnerability in Linux kernel, published on 13 Sep 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:
smb/client: avoid dereferencing rdata=NULL in smb2_new_read_req()
This happens when called from SMB2_read() while using rdma and reaching the rdma_readwrite_threshold.
Weakness: CWE-476
Which versions are affected by CVE-2024-46686?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-46686?
Apply the vendor's patch.
Is CVE-2024-46686 being exploited?
There is no known exploitation of CVE-2024-46686 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-49288, BELL-CVE-2024-46686, DEBIAN-CVE-2024-46686, GHSA-263w-f6fg-v2x5, UBUNTU-CVE-2024-46686.