CVE-2020-25671: Use After Free

Published May 26, 2021
·
Updated

A vulnerability was found in Linux Kernel, where a refcount leak in llcpsockconnect() causing use-after-free which might lead to privilege escalations.

Affected Software

50 affected componentsFixes available
Linux Linux kernel>=3.6<4.4.267
Linux Linux kernel>=4.5<4.9.267
Linux Linux kernel>=4.10<4.14.231
Linux Linux kernel>=4.15<4.19.187
Linux Linux kernel>=4.20<5.4.112
Linux Linux kernel>=5.5<5.10.30
Linux Linux kernel>=5.11<5.11.14
Fedoraproject Fedora=32
Fedoraproject Fedora=33
Fedoraproject Fedora=34
NetApp Active Iq Unified Manager Vsphere
NetApp Cloud Backup
All of the following
NetApp Solidfire Baseboard Management Controller Firmware
NetApp Solidfire Baseboard Management Controller
All of the following
NetApp H410c Firmware
NetApp H410c
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
Debian Debian Linux=9.0
NetApp Solidfire Baseboard Management Controller Firmware
NetApp Solidfire Baseboard Management Controller
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
debian/linux
5.10.223-15.10.234-16.1.129-16.1.135-16.12.25-16.12.27-1

Remediation

Patch Available

http://www.openwall.com/lists/oss-security/2020/11/01/1

Patch Available

https://www.openwall.com/lists/oss-security/2020/11/01/1

Event History

May 26, 2021
CVE Published
via MITRE·10:44 AM
Data Sourced
via MITRE·10:44 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
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Frequently Asked Questions

1

What is the severity of CVE-2020-25671?

CVE-2020-25671 is considered a high severity vulnerability due to its potential to allow privilege escalation.

2

How do I fix CVE-2020-25671?

To fix CVE-2020-25671, users should upgrade to patched versions of the Linux Kernel, such as 5.10.223-1 or later.

3

What causes CVE-2020-25671?

CVE-2020-25671 is caused by a refcount leak in the llcp_sock_connect() function, leading to a use-after-free condition.

4

Which Linux Kernel versions are affected by CVE-2020-25671?

CVE-2020-25671 affects Linux Kernel versions from 3.6 to 4.4.267, 4.5 to 4.9.267, 4.10 to 4.14.231, 4.15 to 4.19.187, 4.20 to 5.4.112, and 5.5 to 5.11.14.

5

Is CVE-2020-25671 a known vulnerability for Fedora?

Yes, CVE-2020-25671 is a known vulnerability that affects specific versions of Fedora, specifically Fedora 32, 33, and 34.

Company

Resources

Contact

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