How severe is CVE-2024-21978?

CVE-2024-21978 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2024-21978 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-21978?

CVE-2024-21978 primarily affects Amd Epyc 7203 Firmware. In total, 86 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-21978?

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

Does CVE-2024-21978 have an EU (EUVD) identifier?

Yes. CVE-2024-21978 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19584.

When was CVE-2024-21978 published?

CVE-2024-21978 was published on 2024-08-05 and last updated on 2026-06-17.

CVE-2024-21978

CVE-2024-21978 is a medium-severity vulnerability in Amd Epyc 7203 Firmware with a CVSS 3.x base score of 6.0. 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-20.

Key facts

Severity: Medium (CVSS 3.x base score 6.0)
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-19584
Weakness: CWE-20
Affected product: Amd Epyc 7203 Firmware
Published: 2024-08-05
Last modified: 2026-06-17

Description

Improper input validation in SEV-SNP could allow a malicious hypervisor to read or overwrite guest memory potentially leading to data leakage or data corruption.

Frequently asked questions

What is CVE-2024-21978?: Improper input validation in SEV-SNP could allow a malicious hypervisor to read or overwrite guest memory potentially leading to data leakage or data corruption.
How severe is CVE-2024-21978?: CVE-2024-21978 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2024-21978 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-21978?: CVE-2024-21978 primarily affects Amd Epyc 7203 Firmware. In total, 86 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-21978?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-21978 have an EU (EUVD) identifier?: Yes. CVE-2024-21978 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19584.
When was CVE-2024-21978 published?: CVE-2024-21978 was published on 2024-08-05 and last updated on 2026-06-17.

References

https://https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3011.html

Affected products (86)

cpe:2.3:o:amd:epyc_7203_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7203p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_72f3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7303_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7303p_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_73f3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7373x_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_74f3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7453_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7473x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7513_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7543_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7543p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_75f3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7573x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7643_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7773x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7643p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7663_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7663p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7713_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7713p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7763_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_8024pn_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_8024p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_8124pn_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_8124p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_8224pn_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_8224p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_8324pn_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_8324p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_8434pn_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_8434p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_8534pn_firmware:*:*:*:*:*:*:*:*

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