high
7.8
CWE
416
Advisory Published
Updated

CVE-2020-25671: Use After Free

First published: Wed May 26 2021(Updated: )

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

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Linux Kernel>=3.6<4.4.267
Linux Kernel>=4.5<4.9.267
Linux Kernel>=4.10<4.14.231
Linux Kernel>=4.15<4.19.187
Linux Kernel>=4.20<5.4.112
Linux Kernel>=5.5<5.10.30
Linux Kernel>=5.11<5.11.14
Red Hat Fedora=32
Red Hat Fedora=33
Red Hat Fedora=34
NetApp Active IQ Unified Manager
NetApp Cloud Backup
All of
NetApp SolidFire Baseboard Management Controller Firmware
NetApp SolidFire
All of
NetApp H410C
NetApp H410C Firmware
All of
NetApp H300S Firmware
NetApp H300S Firmware
All of
NetApp H500e Firmware
NetApp H500e Firmware
All of
NetApp H700S
NetApp H700S
All of
NetApp H300E
NetApp H300E Firmware
All of
NetApp H500S Firmware
NetApp H500e Firmware
All of
NetApp H700E
NetApp H700E
All of
NetApp H410S
NetApp H410S Firmware
Debian Linux=9.0
NetApp SolidFire Baseboard Management Controller Firmware
NetApp SolidFire
NetApp H410C
NetApp H410C Firmware
NetApp H300S Firmware
NetApp H300S Firmware
NetApp H500e Firmware
NetApp H500e Firmware
NetApp H700S
NetApp H700S
NetApp H300E
NetApp H300E Firmware
NetApp H500S Firmware
NetApp H500e Firmware
NetApp H700E
NetApp H700E
NetApp H410S
NetApp H410S Firmware
debian/linux
5.10.223-1
5.10.234-1
6.1.129-1
6.1.128-1
6.12.20-1
6.12.21-1

Remedy

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

Remedy

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

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Reference Links

Frequently Asked Questions

  • 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.

  • 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.

  • 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.

  • 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.

  • 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.

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