CVE-2020-10690 Use after free in kernel
A use-after-free race condition in the Linux kernel PTP driver allows local attackers to cause a system crash or potentially execute code.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-10690?
CVE-2020-10690 is a medium-severity use after free vulnerability in Canonical Ubuntu Linux, published on 8 May 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
There is a use-after-free in kernel versions before 5.5 due to a race condition between the release of ptp_clock and cdev while resource deallocation. When a (high privileged) process allocates a ptp device file (like /dev/ptpX) and voluntarily goes to sleep. During this time if the underlying device is removed, it can cause an exploitable condition as the process wakes up to terminate and clean all attached files. The system crashes due to the cdev structure being invalid (as already freed) which is pointed to by the inode.
Weakness: CWE-416
Which versions are affected by CVE-2020-10690?
It affects 22 products.
Products include Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel, Netapp Active Iq Unified Manager, Netapp Element Software, Netapp H300e Firmware and 16 more.
How do I fix CVE-2020-10690?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2020-10690 being exploited?
There is no known exploitation of CVE-2020-10690 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2020-10690, GHSA-hgvv-3627-37xx, UBUNTU-CVE-2020-10690.