CVE-2021-47359 cifs: Fix soft lockup during fsstress
A soft lockup in the Linux kernel CIFS module can cause system hangs during stress testing, leading to denial of service.
- 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-2021-47359?
CVE-2021-47359 is a medium-severity denial of service vulnerability in Linux kernel, published on 21 May 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:
cifs: Fix soft lockup during fsstress
Below traces are observed during fsstress and system got hung. [ 130.698396] watchdog: BUG: soft lockup - CPU#6 stuck for 26s!
Weakness: CWE-667
Which versions are affected by CVE-2021-47359?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2021-47359?
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-2021-47359 being exploited?
There is no known exploitation of CVE-2021-47359 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2021-47359, GHSA-9rr2-xw5v-w787, ROOT-OS-DEBIAN-11-CVE-2021-47359, UBUNTU-CVE-2021-47359.