MEDIUM
CVE-2019-20054
CWE-476Published: December 28, 2019· Updated: Jun 17, 2026
5.5
CVSS v3.1
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.
Technical Analysis
CVE-2019-20054 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
Linux1 product(s)
linux kernel
netapp16 product(s)
active iq unified managercloud backupdata availability servicese-series santricity os controllerfas\/aff baseboard management controllersolidfire \& hci management nodesteelstore cloud integrated storagesolidfire baseboard management controllerh610s firmwareh610s8300 firmware8300+4
Source: NVD CPE · 17 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (12)
→
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.htmlBroken Link · Third Party Advisory
→
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.11Release Notes · Vendor Advisory
→
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.6Release Notes · Vendor Advisory
→
→
→
https://security.netapp.com/advisory/ntap-20200204-0002/Third Party Advisory
→
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.htmlBroken Link · Third Party Advisory
→
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.11Release Notes · Vendor Advisory
→
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.6Release Notes · Vendor Advisory
→
→
→
https://security.netapp.com/advisory/ntap-20200204-0002/Third Party Advisory
Quick Facts
CVE IDCVE-2019-20054
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-476
CISA KEVNo
Affected2 vendor(s)
PublishedDec 28, 2019
Related CVEs (CWE-476)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2019-20054 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.