CVE-2024-46736 smb: client: fix double put of @cfile in smb2_rename_path()
A double put vulnerability in the Linux kernel SMB client allows attackers to cause a use-after-free, potentially leading to system crashes or code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-46736?
CVE-2024-46736 is a critical use after free vulnerability in Linux kernel, published on 18 Sep 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 double put of @cfile in smb2_rename_path()
If smb2_set_path_attr() is called with a valid @cfile and returned -EINVAL, we need to call cifs_get_writable_path() again as the reference of @cfile was already dropped by previous smb2_compound_op() call.
Weakness: CWE-415
Which versions are affected by CVE-2024-46736?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-46736?
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-2024-46736 being exploited?
There is no known exploitation of CVE-2024-46736 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-46736, DEBIAN-CVE-2024-46736, GHSA-v7w6-282w-jqp8, UBUNTU-CVE-2024-46736.