HIGH
CVE-2020-14356
CWE-476Published: August 19, 2020· Updated: Jun 17, 2026
7.8
CVSS v3.1
Official Description
A flaw null pointer dereference in the Linux kernel cgroupv2 subsystem in versions before 5.7.10 was found in the way when reboot the system. A local user could use this flaw to crash the system or escalate their privileges on the system.
Technical Analysis
CVE-2020-14356 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 complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Vendors & Products
Canonical1 product(s)
ubuntu linux
Debian1 product(s)
debian linux
Linux1 product(s)
linux kernel
netapp6 product(s)
active iq unified managercloud backuphci management nodesolidfiresolidfire baseboard management controller firmwaresolidfire baseboard management controller
openSUSE1 product(s)
leap
Red Hat1 product(s)
enterprise linux
Source: NVD CPE · 15 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
ADVISORYhttps://usn.ubuntu.com/4483-1/
ADVISORYhttps://usn.ubuntu.com/4484-1/
ADVISORYhttps://usn.ubuntu.com/4526-1/
ADVISORYhttps://usn.ubuntu.com/4483-1/
ADVISORYhttps://usn.ubuntu.com/4484-1/
ADVISORYhttps://usn.ubuntu.com/4526-1/
All References (24)
→
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00047.htmlMailing List · Third Party Advisory
→
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00007.htmlMailing List · Third Party Advisory
→
https://bugzilla.kernel.org/show_bug.cgi?id=208003Exploit · Issue Tracking · Vendor Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1868453Issue Tracking · Patch · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2020/09/msg00025.htmlMailing List · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.htmlMailing List · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.htmlMailing List · Third Party Advisory
→
→
https://security.netapp.com/advisory/ntap-20200904-0002/Third Party Advisory
→
https://usn.ubuntu.com/4483-1/Third Party Advisory
→
https://usn.ubuntu.com/4484-1/Third Party Advisory
→
https://usn.ubuntu.com/4526-1/Third Party Advisory
→
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00047.htmlMailing List · Third Party Advisory
→
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00007.htmlMailing List · Third Party Advisory
→
https://bugzilla.kernel.org/show_bug.cgi?id=208003Exploit · Issue Tracking · Vendor Advisory
Quick Facts
CVE IDCVE-2020-14356
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-476
CISA KEVNo
Affected6 vendor(s)
PublishedAug 19, 2020
Related CVEs (CWE-476)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-14356 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.