CVE-2019-19767 Use after free in n/a

What is CVE-2019-19767?

CVE-2019-19767 is a medium-severity use after free vulnerability in Linux kernel, published on 12 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

The Linux kernel before 5.4.2 mishandles ext4_expand_extra_isize, as demonstrated by use-after-free errors in __ext4_expand_extra_isize and ext4_xattr_set_entry, related to fs/ext4/inode.c and fs/ext4/super.c, aka CID-4ea99936a163.

Weakness: CWE-416

Which versions are affected by CVE-2019-19767?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2019-19767?

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-2019-19767 being exploited?

There is no known exploitation of CVE-2019-19767 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-2019-19767, GHSA-hr4p-jvvg-fq5f, UBUNTU-CVE-2019-19767.