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Deadlock Affecting kernel-rt package, versions <0:5.14.0-162.22.2.rt21.186.el9_1

Severity

 Recommended
high

Based on AlmaLinux security rating

    Threat Intelligence

    EPSS
    0.04% (6th percentile)

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  • Snyk ID SNYK-ALMALINUX9-KERNELRT-5659991
  • published 28 May 2023
  • disclosed 27 Mar 2023
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Introduced: 27 Mar 2023

CVE-2022-4269 Open this link in a new tab
CWE-833 Open this link in a new tab

How to fix?

Upgrade AlmaLinux:9 kernel-rt to version 0:5.14.0-162.22.2.rt21.186.el9_1 or higher.
This issue was patched in ALSA-2023:1469.

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 AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

A flaw was found in the Linux kernel Traffic Control (TC) subsystem. Using a specific networking configuration (redirecting egress packets to ingress using TC action "mirred") a local unprivileged user could trigger a CPU soft lockup (ABBA deadlock) when the transport protocol in use (TCP or SCTP) does a retransmission, resulting in a denial of service condition.

References

CVSS Scores

version 3.1
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NVD

5.5 medium
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    High
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SUSE

5.5 medium
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Red Hat

5.5 medium