CVE-2020-25211

Name: CVE-2020-25211
Creator: NVD / NIST
Published: 2020-09-09T16:15:12.003+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6/10EPSS 0.57%

Last modified Jun 17, 2026

CVE-2020-25211 is a medium-severity vulnerability rated 6/10 on the CVSS scale. In the Linux kernel through 5.8.7, local attackers able to inject conntrack netlink configuration could overflow a local buffer, causing crashes or triggering use of incorrect protocol numbers in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c, aka CID-1cc5ef91d2ff.. EPSS estimates a 0.57% chance of exploitation in the next 30 days.

Description

In the Linux kernel through 5.8.7, local attackers able to inject conntrack netlink configuration could overflow a local buffer, causing crashes or triggering use of incorrect protocol numbers in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c, aka CID-1cc5ef91d2ff.

Metrics

CVSS 3.1

6/10

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

EPSS Probability

0.57%

42.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-120

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	<= 5.8.7
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0
Fedoraproject	Fedora	31
Fedoraproject	Fedora	32

References

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1cc5ef91d2ff94d2bf2de3b3585423e8a1051cb6Exploit, Mailing List, Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2020/10/msg00028.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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BL2O4JAMPJG4YMLLJ7JFDHDJRXN4RKTC/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OLDYVOM4OS55HA45Y3UEVLDHYGFXPZUX/
https://security.netapp.com/advisory/ntap-20201009-0001/Third Party Advisory
https://twitter.com/grsecurity/status/1303646421158109185Third Party Advisory
https://www.debian.org/security/2020/dsa-4774Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1cc5ef91d2ff94d2bf2de3b3585423e8a1051cb6Exploit, Mailing List, Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2020/10/msg00028.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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BL2O4JAMPJG4YMLLJ7JFDHDJRXN4RKTC/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OLDYVOM4OS55HA45Y3UEVLDHYGFXPZUX/
https://security.netapp.com/advisory/ntap-20201009-0001/Third Party Advisory
https://twitter.com/grsecurity/status/1303646421158109185Third Party Advisory
https://www.debian.org/security/2020/dsa-4774Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2020-25211?

How severe is CVE-2020-25211?

CVE-2020-25211 has a CVSS score of 6/10 (MEDIUM severity). The EPSS model estimates a 0.57% probability of exploitation in the next 30 days.

How do I fix CVE-2020-25211?

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-2020-25211?

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

Scan your code now

Source: NVD / NIST