CVE-2021-26318
MEDIUMAMD Athlon, Athlon Pro, EPYC, Ryzen, and Ryzen Pro Firmware - Observable Timing Discrepancy via PREFETCH Instructions
Title source: llmDescription
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.
References (1)
Core 1
Core References
Vendor Advisory x_refsource_misc
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1017
Scores
CVSS v3
4.7
EPSS
0.0032
EPSS Percentile
23.1%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Details
CWE
CWE-208
CWE-203
Status
published
Products (5)
amd/athlon_firmware
amd/athlon_pro_firmware
amd/epyc_firmware
amd/ryzen_firmware
amd/ryzen_pro_firmware
Published
Oct 13, 2021
Tracked Since
Feb 18, 2026