Information Exposure Affecting torvalds/linux package, versions [0,]


Severity

Recommended
0.0
medium
0
10

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

Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
0.04% (11th percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-2990232
  • published24 Aug 2022
  • disclosed24 Aug 2022
  • creditMoritz Lipp, Martin Schwarzl, Erik Kraft, Daniel Gruss, from Graz University of Technology

Introduced: 24 Aug 2022

CVE-2021-3714  (opens in a new tab)
CWE-200  (opens in a new tab)

How to fix?

There is no fixed version for torvalds/linux.

Overview

Affected versions of this package are vulnerable to Information Exposure due to a flaw in the memory deduplication mechanism. Previous work has shown that memory deduplication can be attacked via a local exploitation mechanism exploitable by an attacker that can upload page-sized files and detect the change in access time from a networked service to determine if the page has been merged.

Mitigation:

Deactivation of memory deduplication, thus mitigating every attack vector. This mitigation has a potentially significant impact on system performance and stability, so it should be carefully tested prior to deployment.

CVSS Base Scores

version 3.1