Information Exposure Affecting torvalds/linux package, versions [4.4.0-96.119,]


Severity

Recommended
0.0
low
0
10

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

Threat Intelligence

EPSS
0.02% (5th percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-6210177
  • published31 Jan 2024
  • disclosed30 Jan 2024
  • creditUnknown

Introduced: 30 Jan 2024

CVE-2024-0564  (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 via the memory deduplication mechanism. An attacker can leak sensitive information by timing the unmap to merge with the victim's page, which depends on whether it merges with the victim's page and additional physical pages are created beyond the KSM's "max page share".

Note:

This is only exploitable if the attacker and the victim share the same host and the default setting of KSM is "max page sharing=256".

Workaround

This vulnerability can be mitigated by deactivating memory deduplication, which will effectively mitigate all attack vectors but may impact system performance and stability. It is recommended to carefully test this workaround before deployment. Additionally, limiting access to services by disabling services and firewall rules can reduce the risk of successful exploitation by restricting the number of systems an attacker can use to launch an attack from.

CVSS Base Scores

version 3.1