CVE-2020-27825

Name: CVE-2020-27825
Creator: NVD / NIST
Published: 2020-12-11T19:15:12.607+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.7/10EPSS 0.28%

Last modified Jun 17, 2026

CVE-2020-27825 is a medium-severity vulnerability rated 5.7/10 on the CVSS scale. A use-after-free flaw was found in kernel/trace/ring_buffer.c in Linux kernel (before 5.10-rc1). There was a race problem in trace_open and resize of cpu buffer running parallely on different cpus, may cause a denial of service problem (DOS). EPSS estimates a 0.28% chance of exploitation in the next 30 days.

Description

A use-after-free flaw was found in kernel/trace/ring_buffer.c in Linux kernel (before 5.10-rc1). There was a race problem in trace_open and resize of cpu buffer running parallely on different cpus, may cause a denial of service problem (DOS). This flaw could even allow a local attacker with special user privilege to a kernel information leak threat.

Metrics

CVSS 3.1

5.7/10

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

EPSS Probability

0.28%

19.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-362

Affected Software

Vendor	Product	Versions	Update
Linux	Linux Kernel	5.10	Rc1
Redhat	Enterprise Linux	7.0	—
Redhat	Enterprise Linux	8.0	—
Redhat	Enterprise Mrg	2.0	—
Debian	Debian Linux	9.0	—
Debian	Debian Linux	10.0	—
Netapp	Cloud Backup	All versions	—
Netapp	Solidfire Baseboard Management Controller Firmware	All versions	—
Netapp	H410c Firmware	All versions	—

References

https://bugzilla.redhat.com/show_bug.cgi?id=1905155Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00018.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210521-0008/Third Party Advisory
https://www.debian.org/security/2021/dsa-4843Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1905155Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00018.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210521-0008/Third Party Advisory
https://www.debian.org/security/2021/dsa-4843Third Party Advisory

Timeline

Published: Dec 11, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-27825?

How severe is CVE-2020-27825?

CVE-2020-27825 has a CVSS score of 5.7/10 (MEDIUM severity). The EPSS model estimates a 0.28% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27825?

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-2020-27825?

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

Scan your code now

Source: NVD / NIST