Improper Initialization Affecting torvalds/linux package, versions [3.11,5.10.19)


Severity

Recommended
0.0
medium
0
10

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

Threat Intelligence

EPSS
0.03% (6th percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3006721
  • published26 Jan 2022
  • disclosed6 Apr 2021
  • creditUnknown

Introduced: 6 Apr 2021

CVE-2021-28688  (opens in a new tab)
CWE-665  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 5.10.19 or higher.

Overview

Affected versions of this package are vulnerable to Improper Initialization. The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or stale values. This initialization went too far and may under certain conditions also overwrite pointers which are in need of cleaning up. The lack of cleanup would result in leaking persistent grants. The leak in turn would prevent fully cleaning up after a respective guest has died, leaving around zombie domains. All Linux versions having the fix for XSA-365 applied are vulnerable. XSA-365 was classified to affect versions back to at least 3.11.

CVSS Base Scores

version 3.1