CVE-2024-21977
Incomplete cleanup after loading a CPU microcode patch may allow a privileged attacker to degrade...
Incomplete cleanup after loading a CPU microcode patch may allow a privileged attacker to degrade the entropy of the RDRAND instruction, potentially resulting in loss of integrity for SEV-SNP guests.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Incomplete cleanup after loading a CPU microcode patch may allow a privileged attacker to degrade the entropy of the RDRAND instruction, potentially resulting in loss of integrity for SEV-SNP guests.
- Record
CVE-2024-21977- CVSS 3.1
- 3.2 Low
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:N - Weakness
- CWE-459
- Updated
- 2026-11-02
EUVDEUVD-2024-19583
Incomplete cleanup after loading a CPU microcode patch may allow a privileged attacker to degrade the entropy of the RDRAND instruction, potentially resulting in loss of integrity for SEV-SNP guests.
- Record
EUVD-2024-19583- CVSS 3.1
- 3.2 Low
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-hw87-hg67-xw42
Incomplete cleanup after loading a CPU microcode patch may allow a privileged attacker to degrade...
Incomplete cleanup after loading a CPU microcode patch may allow a privileged attacker to degrade the entropy of the RDRAND instruction, potentially resulting in loss of integrity for SEV-SNP guests.
- Record
GHSA-hw87-hg67-xw42- CVSS 3.1
- 3.2 Low
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:N - Weakness
- CWE-459
- Updated
- 2026-11-02
NVD
Incomplete cleanup after loading a CPU microcode patch may allow a privileged attacker to degrade the entropy of the RDRAND instruction, potentially resulting in loss of integrity for SEV-SNP guests.
- Record
CVE-2024-21977- CVSS 3.1
- 3.2 Low
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:N - Weakness
- CWE-459
- Updated
- 2026-11-09
Affected products
- amd epyc™ 7003 series processors
- amd epyc™ 8004 series processors
- amd epyc™ 9004 series processors
- amd epyc™ embedded 7003 series processors
- amd epyc™ embedded 9004 series processors
- amd ryzen™ 5000 series desktop processors
- amd ryzen™ 5000 series mobile processors with radeon™ graphics
- amd ryzen™ 6000 series processors with radeon™ graphics
- amd ryzen™ 7000 series desktop processors
- amd ryzen™ 7030 series mobile processors with radeon™ graphics
- amd ryzen™ 7035 series processors with radeon™ graphics
- amd ryzen™ 7040 series mobile processors with radeon™ graphics
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- amd ryzen™ 7045 series mobile processors with radeon™ graphics
- amd ryzen™ 8000 series desktop processors
- amd ryzen™ embedded 5000 series processors
- amd ryzen™ embedded 7000 series processors
- amd ryzen™ embedded 8000 series processors
- amd ryzen™ embedded v3000 series processors
- amd ryzen™ threadripper™ pro 3000 wx-series processors
- amd ryzen™ threadripper™ pro 5000 wx-series processors
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | NVD | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2024-21977 is a low vulnerability (CVSS 3.2) in Amd Epyc™ 7003 Series Processors, published September 5, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.16%, the 4th percentile. No source names a fixed version.