Improper Preservation of Permissions Affecting kernel-rt package, versions <0:4.18.0-348.20.1.rt7.150.el8_5


0.0
high

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    Exploit Maturity Mature
    EPSS 7.58% (94th percentile)
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NVD
7.8 high
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SUSE
7.8 high
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Red Hat
7.8 high

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  • Snyk ID SNYK-CENTOS8-KERNELRT-2419267
  • published 8 Mar 2022
  • disclosed 7 Mar 2022

How to fix?

Upgrade Centos:8 kernel-rt to version 0:4.18.0-348.20.1.rt7.150.el8_5 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt package and not the kernel-rt package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe and push_pipe functions in the Linux kernel and could thus contain stale values. An unprivileged local user could use this flaw to write to pages in the page cache backed by read only files and as such escalate their privileges on the system.