CVE-2024-42135 vhost_task: Handle SIGKILL by flushing work and exiting
A flaw in the Linux kernel vhost_task component could cause a denial of service when handling SIGKILL signals, requiring a kernel patch.
- 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-2024-42135?
CVE-2024-42135 is a medium-severity denial of service vulnerability in Linux kernel, published on 30 Jul 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:
vhost_task: Handle SIGKILL by flushing work and exiting
Instead of lingering until the device is closed, this has us handle SIGKILL by:
1. marking the worker as killed so we no longer try to use it with new virtqueues and new flush operations. 2. setting the virtqueue to worker mapping so no new works are queued. 3. running all the exiting works.
Which versions are affected by CVE-2024-42135?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-42135?
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-2024-42135 being exploited?
There is no known exploitation of CVE-2024-42135 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-54098, BELL-CVE-2024-42135, DEBIAN-CVE-2024-42135, GHSA-7vmw-m77g-4fxf, ROOT-OS-DEBIAN-11-CVE-2024-42135, ROOT-OS-DEBIAN-12-CVE-2024-42135 and 2 more.