CVE-2019-20795

Name: CVE-2019-20795
Creator: NVD / NIST
Published: 2020-05-09T21:15:10.913+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.4/10EPSS 0.40%

Last modified Jun 17, 2026

CVE-2019-20795 is a medium-severity vulnerability rated 4.4/10 on the CVSS scale. iproute2 before 5.1.0 has a use-after-free in get_netnsid_from_name in ip/ipnetns.c. NOTE: security relevance may be limited to certain uses of setuid that, although not a default, are sometimes a configuration option offered to end users. EPSS estimates a 0.40% chance of exploitation in the next 30 days.

Description

iproute2 before 5.1.0 has a use-after-free in get_netnsid_from_name in ip/ipnetns.c. NOTE: security relevance may be limited to certain uses of setuid that, although not a default, are sometimes a configuration option offered to end users. Even when setuid is used, other factors (such as C library configuration) may block exploitability.

Metrics

CVSS 3.1

4.4/10

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

EPSS Probability

0.40%

32.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Iproute2 Project	Iproute2	< 5.1.0
Canonical	Ubuntu Linux	18.04

References

https://bugzilla.suse.com/show_bug.cgi?id=1171452Issue Tracking, Third Party Advisory
https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/commit/?id=9bf2c538a0eb10d66e2365a655bf6c52f5ba3d10Patch, Third Party Advisory
https://security.gentoo.org/glsa/202008-06Third Party Advisory
https://usn.ubuntu.com/4357-1/Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1171452Issue Tracking, Third Party Advisory
https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/commit/?id=9bf2c538a0eb10d66e2365a655bf6c52f5ba3d10Patch, Third Party Advisory
https://security.gentoo.org/glsa/202008-06Third Party Advisory
https://usn.ubuntu.com/4357-1/Third Party Advisory

Timeline

Published: May 9, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-20795?

How severe is CVE-2019-20795?

CVE-2019-20795 has a CVSS score of 4.4/10 (MEDIUM severity). The EPSS model estimates a 0.40% probability of exploitation in the next 30 days.

How do I fix CVE-2019-20795?

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-2019-20795?

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

Scan your code now

Source: NVD / NIST