Name: CVE-2021-26318: Observable Timing Discrepancy
Creator: Rapid7
Published: 2021-10-13T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2021-26318, CWE-208, CWE-203, CVSS 4.7, EPSS 0.00327

A timing and power-based side channel attack leveraging the x86 PREFETCH instructions on some AMD CPUs could potentially result in leaked kernel address space information.

CVSS Details

CVSS 3.1 Base Score: 4.7
CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Ubuntu	—	No solution exists	Jun 26, 2025	Oct 13, 2021

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CVSS Details

Covered by Rapid7

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