NULL Pointer Dereference Affecting torvalds/linux package, versions [,4.15.16)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.15% (38th percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3005201
  • published26 Jan 2022
  • disclosed2 Apr 2018
  • creditUnknown

Introduced: 2 Apr 2018

CVE-2018-1095  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 4.15.16 or higher.

Overview

Affected versions of this package are vulnerable to NULL Pointer Dereference. The ext4_xattr_check_entries function in fs/ext4/xattr.c in the Linux kernel through 4.15.15 does not properly validate xattr sizes, which causes misinterpretation of a size as an error code, and consequently allows attackers to cause a denial of service (get_acl NULL pointer dereference and system crash) via a crafted ext4 image.

CVSS Base Scores

version 3.1