CVE-2018-19364 Use after free in n/a
A race condition in QEMU's 9pfs implementation allows a use-after-free, potentially enabling code execution or privilege escalation.
- 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-2018-19364?
CVE-2018-19364 is a medium-severity use after free vulnerability in Canonical Ubuntu Linux, published on 13 Dec 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
hw/9pfs/cofile.c and hw/9pfs/9p.c in QEMU can modify an fid path while it is being accessed by a second thread, leading to (for example) a use-after-free outcome.
Weakness: CWE-416
Which versions are affected by CVE-2018-19364?
It affects 5 products.
Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Opensuse Leap, Qemu Qemu.
How do I fix CVE-2018-19364?
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-2018-19364 being exploited?
There is no known exploitation of CVE-2018-19364 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2018-19364, GHSA-6p82-v9w6-85gx, UBUNTU-CVE-2018-19364.