Medium severity4.7NVD Advisory· Published Oct 13, 2021· Updated Jun 17, 2026
CVE-2021-26318
CVE-2021-26318
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.
Affected products
8- cpe:2.3:o:amd:athlon_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:amd:athlon_pro_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:amd:ryzen_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:amd:ryzen_pro_firmware:-:*:*:*:*:*:*:*
- osv-coordsRange: < 26.36.0602723-1.1
- AMD/All supported processorsv5Range: unspecified
Patches
Vulnerability mechanics
References
1- www.amd.com/en/corporate/product-security/bulletin/amd-sb-1017nvdVendor Advisory
News mentions
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