CVE-2024-21977
No known exploitation. EPSS puts it in the 3rd percentile. No fix published yet.
What to do
No fixed build or workaround is published yet. Limit exposure and watch for a patch.
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.1% chance of exploitation activity in the next 30 days, which ranks it in the 3rd percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
3 events over 0 days, from the signal feeds we watch.
- Publishedweakness classified, record updated
Affected products
- AMD EPYC™ 7003 Series ProcessorsHardware Firmware
- AMD EPYC™ 9004 Series ProcessorsHardware Firmware
- AMD EPYC™ 8004 Series ProcessorsHardware Firmware
- AMD Ryzen™ Threadripper™ PRO 5000 WX-Series ProcessorsHardware Firmware
- AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ GraphicsHardware Firmware
- AMD Ryzen™ 7035 Series Processors with Radeon™ GraphicsHardware Firmware
- AMD Ryzen™ 5000 Series Desktop ProcessorsHardware Firmware
- AMD Ryzen™ 7000 Series Desktop ProcessorsHardware Firmware
And 12 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:N
Scored 3.2 by NVD.
How it is reached
- Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required HighRequires admin or elevated privileges
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope ChangedThe exploit can affect other components (e.g. sandbox escape, host compromise from VM)
Impact if exploited
- Confidentiality NoneNo confidentiality impact
- Integrity LowData modification is possible but limited in scope or consequence
- Availability NoneNo availability impact
Weaknesses
Sources
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