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Vulnerability record · CVE-2020-14305 · published 2 December 2020

CVE-2020-14305: Linux kernel out-of-bounds write vulnerability

Linux · Linux Kernel

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.

8.1 CVSS 3.1 High EPSS 5.2% · top 7.9% CWE-787 · Out-of-bounds write
8.1CVSS 3.1 base score, v2 8.3
5.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugs.openvz.org/browse/OVZ-7188 ExploitThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1850716 Issue TrackingPatchThird 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-7188 ExploitThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1850716 Issue TrackingPatchThird 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

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Source: NIST National Vulnerability Database (record CVE-2020-14305), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.