CVE-2020-25669

Name: CVE-2020-25669
Creator: NVD / NIST
Published: 2021-05-26T12:15:15.743+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.63%

Last modified Jun 17, 2026

CVE-2020-25669 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbd_disconnect, there is still an alias in sunkbd_reinit causing Use After Free.. EPSS estimates a 0.63% chance of exploitation in the next 30 days.

Description

A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbd_disconnect, there is still an alias in sunkbd_reinit causing Use After Free.

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

0.63%

45.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	< 4.4.245
Linux	Linux Kernel	>= 4.5, < 4.9.245
Linux	Linux Kernel	>= 4.10, < 4.14.208
Linux	Linux Kernel	>= 4.15, < 4.19.159
Linux	Linux Kernel	>= 4.20, < 5.4.79
Linux	Linux Kernel	>= 5.5, < 5.9.10
Debian	Debian Linux	9.0
Netapp	Cloud Backup	All versions
Netapp	Solidfire \& Hci Management Node	All versions
Netapp	Solidfire Baseboard Management Controller	All versions
Netapp	H300s Firmware	All versions
Netapp	H500s Firmware	All versions
Netapp	H700s Firmware	All versions
Netapp	H300e Firmware	All versions
Netapp	H500e Firmware	All versions
Netapp	H700e Firmware	All versions
Netapp	H410s Firmware	All versions
Netapp	H410c Firmware	All versions

References

http://www.openwall.com/lists/oss-security/2020/11/05/2Exploit, Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/11/20/5Exploit, Mailing List, Third Party Advisory
https://github.com/torvalds/linux/commit/77e70d351db7de07a46ac49b87a6c3c7a60fca7ePatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/12/msg00027.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210702-0006/Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/11/05/2%2C
https://www.openwall.com/lists/oss-security/2020/11/20/5%2C
http://www.openwall.com/lists/oss-security/2020/11/05/2Exploit, Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/11/20/5Exploit, Mailing List, Third Party Advisory
https://github.com/torvalds/linux/commit/77e70d351db7de07a46ac49b87a6c3c7a60fca7ePatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/12/msg00027.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210702-0006/Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/11/05/2%2C
https://www.openwall.com/lists/oss-security/2020/11/20/5%2C

Timeline

Published: May 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-25669?

How severe is CVE-2020-25669?

CVE-2020-25669 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.63% probability of exploitation in the next 30 days.

How do I fix CVE-2020-25669?

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-2020-25669?

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

Scan your code now

Source: NVD / NIST