CVE-2017-18241 Null dereference in n/a
Local users can cause a kernel panic and denial of service via a NULL pointer dereference in the F2FS filesystem when using the noflush_merge option.
- 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-2017-18241?
CVE-2017-18241 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 21 Mar 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
fs/f2fs/segment.c in the Linux kernel before 4.13 allows local users to cause a denial of service (NULL pointer dereference and panic) by using a noflush_merge option that triggers a NULL value for a flush_cmd_control data structure.
Weakness: CWE-476
Which versions are affected by CVE-2017-18241?
It affects 3 products.
Products include Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel.
How do I fix CVE-2017-18241?
Upgrade to a fixed version.
Is CVE-2017-18241 being exploited?
There is no known exploitation of CVE-2017-18241 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2017-18241, GHSA-fmfp-q8w9-qgxv, UBUNTU-CVE-2017-18241.