CVE-2020-14305

Name: CVE-2020-14305
Creator: NVD / NIST
Published: 2020-12-02T01:15:12.077+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 5.11%

Last modified Jun 17, 2026

CVE-2020-14305 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. An out-of-bounds memory write flaw was found in how the Linux kernel’s Voice Over IP H.323 connection tracking functionality handled connections on ipv6 port 1720. This flaw allows an unauthenticated remote user to crash the system, causing a denial of service. EPSS estimates a 5.11% chance of exploitation in the next 30 days.

Description

An out-of-bounds memory write flaw was found in how the Linux kernel’s Voice Over IP H.323 connection tracking functionality handled connections on ipv6 port 1720. This flaw allows an unauthenticated remote user to crash the system, causing a denial of service. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Metrics

CVSS 3.1

8.1/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

5.11%

91.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	<= 4.11.12
Linux	Linux Kernel	4.12
Netapp	Cloud Backup	All versions
Netapp	A250 Firmware	All versions
Netapp	Fas 500f Firmware	All versions
Netapp	Aff 500f Firmware	All versions
Netapp	Solidfire Baseboard Management Controller Firmware	All versions

References

https://bugs.openvz.org/browse/OVZ-7188Exploit, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1850716Issue Tracking, Patch, Third Party Advisory
https://patchwork.ozlabs.org/project/netfilter-devel/patch/c2385b5c-309c-cc64-2e10-a0ef62897502%40virtuozzo.com/
https://security.netapp.com/advisory/ntap-20201210-0004/Third Party Advisory
https://bugs.openvz.org/browse/OVZ-7188Exploit, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1850716Issue Tracking, Patch, Third Party Advisory
https://patchwork.ozlabs.org/project/netfilter-devel/patch/c2385b5c-309c-cc64-2e10-a0ef62897502%40virtuozzo.com/
https://security.netapp.com/advisory/ntap-20201210-0004/Third Party Advisory

Timeline

Published: Dec 2, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-14305?

How severe is CVE-2020-14305?

CVE-2020-14305 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 5.11% probability of exploitation in the next 30 days.

How do I fix CVE-2020-14305?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-14305?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST