CVE-2021-47074 nvme-loop: fix memory leak in nvme_loop_create_ctrl()
A memory leak in the Linux kernel's NVMe loop driver allows attackers to cause denial of service by exhausting system memory.
- 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-2021-47074?
CVE-2021-47074 is a medium-severity memory corruption vulnerability in Linux kernel, published on 1 Mar 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:
nvme-loop: fix memory leak in nvme_loop_create_ctrl()
When creating loop ctrl in nvme_loop_create_ctrl(), if nvme_init_ctrl() fails, the loop ctrl should be freed before jumping to the "out" label.
Weakness: CWE-401
Which versions are affected by CVE-2021-47074?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2021-47074?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-47074 being exploited?
There is no known exploitation of CVE-2021-47074 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2021-47074, GHSA-6ccp-3692-j6fr, UBUNTU-CVE-2021-47074.