What’s Vulnerable › Vulnerabilities

CVE-2019-20054

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-12-28 · updated 2026-06-17
• Weakness: CWE-476

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.

Affected products

• Linux kernel: before 5.0.6 — fixed in 5.0.6
• NetApp 8300 Firmware: all versions
• NetApp 8700 Firmware: all versions
• NetApp A400 Firmware: all versions
• Active IQ Unified Manager for VMware vSphere, Linux, and Microsoft Windows: all versions
• NetApp Cloud Backup: all versions
• NetApp Data Availability Services: all versions
• E-Series SANtricity OS Controller Software 11.x: from 11.0 through 11.70.2
• NetApp Fas/Aff Baseboard Management Controller: all versions
• NetApp H610S Firmware: all versions
• NetApp Solidfire & Hci Management Node: all versions
• NetApp Solidfire Baseboard Management Controller: all versions
• NetApp Steelstore Cloud Integrated Storage: all versions

How to fix

Upgrade to a fixed version: Linux kernel 5.0.6. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.11
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.6
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=23da9588037ecdd4901db76a5b79a42b529c4ec3
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=89189557b47b35683a27c80ee78aef18248eefb4
• https://security.netapp.com/advisory/ntap-20200204-0002/
• http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.11
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.6
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=23da9588037ecdd4901db76a5b79a42b529c4ec3
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=89189557b47b35683a27c80ee78aef18248eefb4
• https://security.netapp.com/advisory/ntap-20200204-0002/

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