CVE-2020-25669: Use After Free

Published May 26, 2021
·
Updated

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

Affected Software

43 affected componentsFixes available
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
NetApp Solidfire \& Hci Management Node
NetApp Solidfire Baseboard Management Controller
All of the following
NetApp H300s Firmware
NetApp H300s
All of the following
NetApp H500s Firmware
NetApp H500s
All of the following
NetApp H700s Firmware
NetApp H700s
All of the following
NetApp H300e Firmware
NetApp H300e
All of the following
NetApp H500e Firmware
NetApp H500e
All of the following
NetApp H700e Firmware
NetApp H700e
All of the following
NetApp H410s Firmware
NetApp H410s
All of the following
NetApp H410c Firmware
NetApp H410c
NetApp H300s Firmware
NetApp H300s
NetApp H500s Firmware
NetApp H500s
NetApp H700s Firmware
NetApp H700s
NetApp H300e Firmware
NetApp H300e
NetApp H500e Firmware
NetApp H500e
NetApp H700e Firmware
NetApp H700e
NetApp H410s Firmware
NetApp H410s
NetApp H410c Firmware
NetApp H410c
debian/linux
5.10.223-15.10.234-16.1.129-16.1.135-16.12.22-16.12.25-1

Event History

May 26, 2021
CVE Published
via MITRE·11:25 AM
Data Sourced
via MITRE·11:25 AM
DescriptionWeakness
Jan 11, 2024
Data Sourced
via Launchpad·11:46 PM
Description
Apr 28, 2025
Data Sourced
via Ubuntu·04:22 AM
RemedyDescriptionSeverityAffected Software
Data Sourced
via Debian·04:23 AM
DescriptionAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2020-25669?

CVE-2020-25669 has been assigned a medium severity rating due to the potential for a Use After Free vulnerability affecting the Linux Kernel.

2

How do I fix CVE-2020-25669?

To fix CVE-2020-25669, you should upgrade the Linux Kernel to version 5.10.223-1 or later.

3

Which versions of the Linux Kernel are affected by CVE-2020-25669?

CVE-2020-25669 affects Linux Kernel versions between 4.4.0 and 5.4.x and several other specific range versions.

4

What systems are impacted by CVE-2020-25669?

CVE-2020-25669 impacts various Linux distributions, including Debian Linux and may affect systems running specific NetApp firmware.

5

What type of vulnerability is CVE-2020-25669?

CVE-2020-25669 is classified as a Use After Free vulnerability, which can potentially lead to unauthorized access or system crashes.

Contact

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