CVE-2024-50285 ksmbd: check outstanding simultaneous SMB operations
A remote attacker can cause a denial of service in the Linux kernel's ksmbd server by sending simultaneous SMB operations that exhaust memory.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-50285?
CVE-2024-50285 is a high-severity denial of service 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: check outstanding simultaneous SMB operations
If Client send simultaneous SMB operations to ksmbd, It exhausts too much memory through the "ksmbd_work_cache”. It will cause OOM issue. ksmbd has a credit mechanism but it can't handle this problem. This patch add the check if it exceeds max credits to prevent this problem by assuming that one smb request consumes at least one credit.
Weakness: CWE-770
Which versions are affected by CVE-2024-50285?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-50285?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-50285 being exploited?
There is no known exploitation of CVE-2024-50285 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-53570, AZL-53753, BELL-CVE-2024-50285, DEBIAN-CVE-2024-50285, GHSA-w4qv-rrv4-jm4w, ROOT-OS-DEBIAN-12-CVE-2024-50285 and 2 more.