CVE-2019-20054 Null dereference in n/a

What is CVE-2019-20054?

CVE-2019-20054 is a medium-severity vulnerability in Linux kernel, published on 28 Dec 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel before 5.0.6, there is a NULL pointer dereference in drop_sysctl_table() in fs/proc/proc_sysctl.c, related to put_links, aka CID-23da9588037e.

Weakness: CWE-476

Which versions are affected by CVE-2019-20054?

It affects 13 products.

Products include Linux kernel, Netapp 8300 Firmware, Netapp 8700 Firmware, Netapp A400 Firmware, Netapp Active Iq Unified Manager, Netapp Cloud Backup and 7 more.

How do I fix CVE-2019-20054?

Apply the vendor's patch.

Is CVE-2019-20054 being exploited?

There is no known exploitation of CVE-2019-20054 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-2019-20054, GHSA-jgf2-2xcw-5gxx, UBUNTU-CVE-2019-20054.