CVE-2024-50283 ksmbd: fix slab-use-after-free in smb3_preauth_hash_rsp
A use-after-free flaw in the Linux kernel's ksmbd module allows attackers to potentially execute code or escalate privileges via crafted SMB3 preauth hash responses.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-50283?
CVE-2024-50283 is a critical use after free vulnerability in Linux kernel, published on 19 Nov 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:
ksmbd: fix slab-use-after-free in smb3_preauth_hash_rsp
ksmbd_user_session_put should be called under smb3_preauth_hash_rsp(). It will avoid freeing session before calling smb3_preauth_hash_rsp().
Weakness: CWE-416
Which versions are affected by CVE-2024-50283?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-50283?
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-2024-50283 being exploited?
There is no known exploitation of CVE-2024-50283 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-50283, DEBIAN-CVE-2024-50283, GHSA-8jxm-phrp-w2j4, UBUNTU-CVE-2024-50283.