What’s Vulnerable › Vulnerabilities

CVE-2019-19767

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-12-12 · updated 2026-06-17
• Weakness: CWE-416

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.

Affected products

• Linux kernel: before 5.4.2 — fixed in 5.4.2

How to fix

Upgrade to a fixed version: Linux kernel 5.4.2. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html
• https://bugzilla.kernel.org/show_bug.cgi?id=205609
• https://bugzilla.kernel.org/show_bug.cgi?id=205707
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.2
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4ea99936a1630f51fc3a2d61a58ec4a1c4b7d55a
• https://github.com/torvalds/linux/commit/4ea99936a1630f51fc3a2d61a58ec4a1c4b7d55a
• https://lists.debian.org/debian-lts-announce/2020/01/msg00013.html
• https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html
• https://security.netapp.com/advisory/ntap-20200103-0001/
• https://usn.ubuntu.com/4258-1/
• https://usn.ubuntu.com/4284-1/
• https://usn.ubuntu.com/4287-1/

Get alerted when CVE-2019-19767 or the next vulnerability affects your stack