CVE-2020-25220

Name: CVE-2020-25220
Creator: NVD / NIST
Published: 2020-09-10T02:15:11.55+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.45%

Last modified Jun 17, 2026

CVE-2020-25220 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. The Linux kernel 4.9.x before 4.9.233, 4.14.x before 4.14.194, and 4.19.x before 4.19.140 has a use-after-free because skcd->no_refcnt was not considered during a backport of a CVE-2020-14356 patch. This is related to the cgroups feature.. EPSS estimates a 0.45% chance of exploitation in the next 30 days.

Description

The Linux kernel 4.9.x before 4.9.233, 4.14.x before 4.14.194, and 4.19.x before 4.19.140 has a use-after-free because skcd->no_refcnt was not considered during a backport of a CVE-2020-14356 patch. This is related to the cgroups feature.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.45%

35.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 4.9.0, < 4.9.233
Linux	Linux Kernel	>= 4.14, < 4.14.194
Linux	Linux Kernel	>= 4.19, < 4.19.140

References

https://bugzilla.redhat.com/show_bug.cgi?id=1868453Issue Tracking, Patch, Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.194Release Notes, Vendor Advisory
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.140Release Notes, Vendor Advisory
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.233Release Notes, Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-4.14.y&id=82fd2138a5ffd7e0d4320cdb669e115ee976a26eIssue Tracking, Patch, Vendor 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-20201001-0004/Third Party Advisory
https://www.spinics.net/lists/stable/msg405099.htmlMailing List, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1868453Issue Tracking, Patch, Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.194Release Notes, Vendor Advisory
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.140Release Notes, Vendor Advisory
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.233Release Notes, Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-4.14.y&id=82fd2138a5ffd7e0d4320cdb669e115ee976a26eIssue Tracking, Patch, Vendor 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-20201001-0004/Third Party Advisory
https://www.spinics.net/lists/stable/msg405099.htmlMailing List, Patch, Third Party Advisory

Timeline

Published: Sep 10, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-25220?

How severe is CVE-2020-25220?

CVE-2020-25220 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.45% probability of exploitation in the next 30 days.

How do I fix CVE-2020-25220?

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-2020-25220?

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

Scan your code now

Source: NVD / NIST