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NULL Pointer Dereference Affecting kernel package, versions <0:4.14.59-68.43.amzn2

Severity

 Recommended
low

Based on Amazon Linux security rating

    Threat Intelligence

    EPSS
    0.19% (58th percentile)

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  • Snyk ID SNYK-AMZN2-KERNEL-1664975
  • published 27 Sep 2021
  • disclosed 3 Jul 2018
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Introduced: 3 Jul 2018

CVE-2018-13093 Open this link in a new tab
CWE-476 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2 kernel to version 0:4.14.59-68.43.amzn2 or higher.
This issue was patched in ALAS2-2018-1051.

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.

An issue was discovered in fs/xfs/xfs_icache.c in the Linux kernel through 4.17.3. There is a NULL pointer dereference and panic in lookup_slow() on a NULL inode->i_ops pointer when doing pathwalks on a corrupted xfs image. This occurs because of a lack of proper validation that cached inodes are free during allocation.