CVE-2021-26318 — Observable Timing Discrepancy in AMD ALL Supported Processors

CWE-208 — Observable Timing DiscrepancyCWE-203 — Observable Discrepancy3 documents3 sources
Severity
4.7MEDIUMNVD
EPSS
0.1%
top 70.52%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
AMD ALL Supported Processors
Timeline
PublishedOct 13
Latest updateMay 24

Description

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 vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:NExploitability: 1.0 | Impact: 3.6

Affected Packages1 packages

▶CVEListV5amd/all_supported_processorsunspecified — undefined

🔴Vulnerability Details

2
GHSA
GHSA-8rf7-vpj6-3967: A timing and power-based side channel attack leveraging the x86 PREFETCH instructions on some AMD CPUs could potentially result in leaked kernel addre↗2022-05-24
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OSV
CVE-2021-26318: A timing and power-based side channel attack leveraging the x86 PREFETCH instructions on some AMD CPUs could potentially result in leaked kernel addre↗2021-10-13
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