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NULL Pointer Dereference Affecting linux-4.9 package, versions <4.9.210-1~deb8u1

Severity

 Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.19% (58th percentile)

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  • Snyk IDSNYK-DEBIAN8-LINUX49-551830
  • published11 Jul 2018
  • disclosed3 Jul 2018
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Introduced: 3 Jul 2018

CVE-2018-13093  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade Debian:8 linux-4.9 to version 4.9.210-1~deb8u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-4.9 package and not the linux-4.9 package as distributed by Debian. See How to fix? for Debian:8 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.