CVE-2019-19770 Use after free in n/a

What is CVE-2019-19770?

CVE-2019-19770 is a high-severity use after free vulnerability in Linux kernel, published on 12 Dec 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In the Linux kernel 4.19.83, there is a use-after-free (read) in the debugfs_remove function in fs/debugfs/inode.c (which is used to remove a file or directory in debugfs that was previously created with a call to another debugfs function such as debugfs_create_file). NOTE: Linux kernel developers dispute this issue as not being an issue with debugfs, instead this is an issue with misuse of debugfs within blktrace

Weakness: CWE-416

Which versions are affected by CVE-2019-19770?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2019-19770?

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-2019-19770 being exploited?

There is no known exploitation of CVE-2019-19770 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-2019-19770, GHSA-6xfg-823w-w33f, UBUNTU-CVE-2019-19770.