User Enumeration Affecting torvalds/linux package, versions [,5.13.8)


Severity

Recommended
0.0
medium
0
10

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

Threat Intelligence

EPSS
0.01% (1st percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3005985
  • published26 Jan 2022
  • disclosed2 Aug 2021
  • creditUnknown

Introduced: 2 Aug 2021

CVE-2021-34556  (opens in a new tab)
CWE-203  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 5.13.8 or higher.

Overview

Affected versions of this package are vulnerable to User Enumeration. In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from kernel memory via a Speculative Store Bypass side-channel attack because the protection mechanism neglects the possibility of uninitialized memory locations on the BPF stack.

References

CVSS Base Scores

version 3.1