CVE-2021-33135 Denial of service in Intel(R) SGX
An authenticated local user can cause a denial of service in the Linux kernel via uncontrolled resource consumption in Intel SGX drivers.
- 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-2021-33135?
CVE-2021-33135 is a medium-severity denial of service vulnerability in Intel(R) SGX, published on 12 May 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Uncontrolled resource consumption in the Linux kernel drivers for Intel(R) SGX may allow an authenticated user to potentially enable denial of service via local access.
Weakness: CWE-400
Which versions are affected by CVE-2021-33135?
It affects 1 product.
Products include Intel Software Guard Extensions.
How do I fix CVE-2021-33135?
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-2021-33135 being exploited?
There is no known exploitation of CVE-2021-33135 in the wild and no public exploit code.
Other vulnerabilities in Intel(R) SGX
Sources
Also known as DEBIAN-CVE-2021-33135, GHSA-q2pr-ffxw-p47h, UBUNTU-CVE-2021-33135.