What is CVE-2021-46778?

CVE-2021-46778 is a medium-severity vulnerability in Amd Processors, classified under Observable Discrepancy. CVSS score: 5.6/10. Published 2022-08-10.

How severe is CVE-2021-46778?

Medium severity. CVSS v3 base score is 5.6 out of 10.

Is CVE-2021-46778 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Amd Processors

CVE-2021-46778

Execution unit scheduler contention may lead to a side channel vulnerability found on AMD CPU microarchitectures codenamed “Zen 1”, “Zen 2” and “Zen 3” that use simultaneous multithreading (SMT). By measuring the contention level on schedu…

EPSS: 0.002 (12.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N.

Affected products

Amd Processors — versions Processor Some AMD Processors
Amd Athlon_3050ge
Amd Athlon_3050ge_firmware
Amd Athlon_3150g
Amd Athlon_3150ge
Amd Athlon_3150ge_firmware
Amd Athlon_3150g_firmware
Amd Epyc_7001
Amd Epyc_7001_firmware
Amd Epyc_7002

Weakness classification (CWE)

CWE-203 — Observable Discrepancy

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

psirt@amd.com (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-46778?: CVE-2021-46778 is a medium-severity vulnerability in Amd Processors, classified under Observable Discrepancy. CVSS score: 5.6/10. Published 2022-08-10.
How severe is CVE-2021-46778?: Medium severity. CVSS v3 base score is 5.6 out of 10.
Is CVE-2021-46778 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.