CVE-2017-2618 Null dereference in kernel
An attacker can crash the Linux kernel by writing null bytes to SELinux attribute files, causing a system-wide 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-2017-2618?
CVE-2017-2618 is a medium-severity vulnerability in Debian Debian Linux, published on 27 Jul 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw was found in the Linux kernel's handling of clearing SELinux attributes on /proc/pid/attr files before 4.9.10. An empty (null) write to this file can crash the system by causing the system to attempt to access unmapped kernel memory.
Which versions are affected by CVE-2017-2618?
It affects 8 products.
Products include Debian Debian Linux, Linux kernel, Redhat Enterprise Linux, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus and 2 more.
How do I fix CVE-2017-2618?
Apply the vendor's patch.
Is CVE-2017-2618 being exploited?
There is no known exploitation of CVE-2017-2618 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2017-2618, GHSA-hpw2-j46j-hpv2, UBUNTU-CVE-2017-2618.