Exposure of Sensitive Information Through Data Queries Affecting torvalds/linux package, versions [,5.7-rc1)


Severity

Recommended
0.0
medium
0
10

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

Threat Intelligence

EPSS
0.01% (2nd percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-2992935
  • published25 Aug 2022
  • disclosed25 Aug 2022
  • creditDe4dCr0w (360 Vulnerability Research Institute)

Introduced: 25 Aug 2022

CVE-2021-4159  (opens in a new tab)
CWE-202  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 5.7-rc1 or higher.

Overview

Affected versions of this package are vulnerable to Exposure of Sensitive Information Through Data Queries via the EBPF verifier when handling internal data structures, due to ability of Internal memory locations to be returned to the userspace. A local attacker with the permissions to insert eBPF code to the kernel can use this to leak internal kernel memory details defeating some of the exploit mitigations in place for the kernel.

CVSS Base Scores

version 3.1