CVE-2020-27830 Null dereference in kernel
A null pointer dereference in the Linux Kernel's spk_ttyio_receive_buf2 function can cause a system crash, leading to denial of service.
- 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-2020-27830?
CVE-2020-27830 is a medium-severity vulnerability in Debian Debian Linux, published on 13 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was found in Linux Kernel where in the spk_ttyio_receive_buf2() function, it would dereference spk_ttyio_synth without checking whether it is NULL or not, and may lead to a NULL-ptr deref crash.
Weakness: CWE-476
Which versions are affected by CVE-2020-27830?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2020-27830?
Apply the vendor's patch.
Is CVE-2020-27830 being exploited?
There is no known exploitation of CVE-2020-27830 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2020-27830, GHSA-w2vj-j8wh-3c7w, UBUNTU-CVE-2020-27830.