How severe is CVE-2021-46778?

CVE-2021-46778 has a CVSS 3.x base score of 5.6, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-46778 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-46778?

CVE-2021-46778 primarily affects Amd Athlon 3050ge Firmware. In total, 179 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-46778?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-46778 published?

CVE-2021-46778 was published on 2022-08-10 and last updated on 2026-06-17.

CVE-2021-46778

CVE-2021-46778 is a medium-severity vulnerability in Amd Athlon 3050ge Firmware with a CVSS 3.x base score of 5.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-203.

Key facts

Severity: Medium (CVSS 3.x base score 5.6)
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-203
Affected product: Amd Athlon 3050ge Firmware
Published: 2022-08-10
Last modified: 2026-06-17

Description

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 scheduler queues an attacker may potentially leak sensitive information.

Frequently asked questions

What is 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 scheduler queues an attacker may potentially leak sensitive information.
How severe is CVE-2021-46778?: CVE-2021-46778 has a CVSS 3.x base score of 5.6, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-46778 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-46778?: CVE-2021-46778 primarily affects Amd Athlon 3050ge Firmware. In total, 179 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-46778?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-46778 published?: CVE-2021-46778 was published on 2022-08-10 and last updated on 2026-06-17.

References

https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1039

Affected products (179)

cpe:2.3:o:amd:athlon_3050ge_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:athlon_3150g_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:athlon_3150ge_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7001_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7002_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7003_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7232p_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7251_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7252_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7261_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7262_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7272_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7281_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7282_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_72f3_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7301_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7302_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7302p_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7313_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7313p_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7343_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7351_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7351p_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7352_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7371_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7373x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_73f3_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7401_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7401p_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7402_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7402p_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7413_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7443_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7443p_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7451_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7452_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7453_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7473x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_74f3_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7501_firmware:-:*:*:*:*:*:*:*

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