Out-of-bounds Read Affecting torvalds/linux package, versions [2.6.24-rc1,6.4-rc2)


Severity

Recommended
0.0
medium
0
10

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

Threat Intelligence

EPSS
0.01% (1st percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-5673173
  • published9 Jun 2023
  • disclosed9 Jun 2023
  • creditUnknown

Introduced: 9 Jun 2023

CVE-2023-34256  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 6.4-rc2 or higher.

Overview

Affected versions of this package are vulnerable to Out-of-bounds Read in crc16 in lib/crc16.c when called from fs/ext4/super.c because ext4_group_desc_csum does not properly check an offset.

NOTE: This is disputed because the kernel is not intended to defend against attackers with the ability to modify the block device while it is mounted by the filesystem.

CVSS Base Scores

version 3.1