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Out-of-Bounds Affecting kernel package, versions <0:4.14.42-61.37.amzn2

Severity

 Recommended
high

Based on Amazon Linux security rating

    Threat Intelligence

    EPSS
    0.06% (28th percentile)

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  • Snyk ID SNYK-AMZN2-KERNEL-1662848
  • published 27 Sep 2021
  • disclosed 27 Mar 2018
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Introduced: 27 Mar 2018

CVE-2018-1091 Open this link in a new tab
CWE-119 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2 kernel to version 0:4.14.42-61.37.amzn2 or higher.
This issue was patched in ALAS2-2018-1023.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

In the flush_tmregs_to_thread function in arch/powerpc/kernel/ptrace.c in the Linux kernel before 4.13.5, a guest kernel crash can be triggered from unprivileged userspace during a core dump on a POWER host due to a missing processor feature check and an erroneous use of transactional memory (TM) instructions in the core dump path, leading to a denial of service.