CVE-2021-47147 ptp: ocp: Fix a resource leak in an error handling path
A resource leak in the Linux kernel PTP OCP driver allows attackers to cause a denial of service by triggering an error path that fails to unmap memory.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-47147?
CVE-2021-47147 is a medium-severity denial of service vulnerability in Linux kernel, published on 25 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:
ptp: ocp: Fix a resource leak in an error handling path
If an error occurs after a successful 'pci_ioremap_bar()' call, it must be undone by a corresponding 'pci_iounmap()' call, as already done in the remove function.
Weakness: CWE-401
Which versions are affected by CVE-2021-47147?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2021-47147?
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-2021-47147 being exploited?
There is no known exploitation of CVE-2021-47147 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2021-47147, GHSA-563m-xr38-7c3j, UBUNTU-CVE-2021-47147.