CVE-2019-19377 Use after free in n/a

What is CVE-2019-19377?

CVE-2019-19377 is a high-severity use after free vulnerability in Linux kernel, published on 29 Nov 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 btrfs filesystem image, performing some operations, and unmounting can lead to a use-after-free in btrfs_queue_work in fs/btrfs/async-thread.c.

Weakness: CWE-416

Which versions are affected by CVE-2019-19377?

It affects 5 products.

Products include Linux kernel, Netapp Active Iq Unified Manager, Netapp Cloud Backup, Netapp Solidfire Baseboard Management Controller, Netapp Steelstore Cloud Integrated Storage.

How do I fix CVE-2019-19377?

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-2019-19377 being exploited?

There is no known exploitation of CVE-2019-19377 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2019-19377, GHSA-w83r-756w-m93f, UBUNTU-CVE-2019-19377.