NULL Pointer Dereference Affecting kernel-rt-kvm package, versions <0:3.10.0-693.17.1.rt56.636.el7


Severity

Recommended
high

Based on CentOS security rating

    Threat Intelligence

    EPSS
    0.04% (6th percentile)

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  • Snyk ID SNYK-CENTOS7-KERNELRTKVM-2095918
  • published 26 Jul 2021
  • disclosed 2 Nov 2017

How to fix?

Upgrade Centos:7 kernel-rt-kvm to version 0:3.10.0-693.17.1.rt56.636.el7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-kvm package and not the kernel-rt-kvm package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

The assoc_array_insert_into_terminal_node function in lib/assoc_array.c in the Linux kernel before 4.13.11 mishandles node splitting, which allows local users to cause a denial of service (NULL pointer dereference and panic) via a crafted application, as demonstrated by the keyring key type, and key addition and link creation operations.