CVE-2019-19447 Use after free in n/a
A local attacker can trigger a use-after-free in the Linux kernel ext4 filesystem by mounting a crafted image, potentially leading to code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2019-19447?
CVE-2019-19447 is a high-severity use after free vulnerability in Linux kernel, published on 8 Dec 2019. 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
In the Linux kernel 5.0.21, mounting a crafted ext4 filesystem image, performing some operations, and unmounting can lead to a use-after-free in ext4_put_super in fs/ext4/super.c, related to dump_orphan_list in fs/ext4/super.c.
Weakness: CWE-416
Which versions are affected by CVE-2019-19447?
It affects 7 products.
Products include Linux kernel, Netapp Active Iq Unified Manager, Netapp Cloud Backup, Netapp Data Availability Services, Netapp Hci Baseboard Management Controller, Netapp Solidfire Baseboard Management Controller and 1 more.
How do I fix CVE-2019-19447?
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-2019-19447 being exploited?
There is no known exploitation of CVE-2019-19447 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2019-19447, GHSA-jx5x-5x47-rh28, UBUNTU-CVE-2019-19447.