CVE-2024-21977Incomplete cleanup after loading a CPU microcode patch may allow a privileged attacker to degrade the entropy of the RDRAND instruction,…
- 3.2LowCVSS base score
- 0.16%Exploitation in 30 daysEPSS · top 95% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By AMD
- 20 months later
· 20 months later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| AMDCNA (assigner) | 3.1 | Low3.2 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:N |
| NVDNVD · Deferred | 3.1 | Low3.2 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.16% · top 95% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.2.
Affected products
AMD · AMD EPYC™ 7003 Series Processors
- unaffected MilanPI 1.0.0.D
AMD · AMD EPYC™ 9004 Series Processors
- unaffected GenoaPI 1.0.0.C
AMD · AMD EPYC™ 8004 Series Processors
- unaffected GenoaPI 1.0.0.C
AMD · AMD Ryzen™ Threadripper™ PRO 5000 WX-Series Processors
- unaffected ChagallWSPI-sWRX8 1.0.0.8
AMD · AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics
- unaffected CezannePI-FP6_1.0.1.1
AMD · AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics
- unaffected RembrandtPI-FP7/FP7r2_1.0.0.B
AMD · AMD Ryzen™ 5000 Series Desktop Processors
- unaffected ComboAM4v2 1.2.0.Cb
AMD · AMD Ryzen™ 7000 Series Desktop Processors
- unaffected ComboAM5 1.2.0.1
AMD · AMD Ryzen™ 7040 Series Mobile Processors with Radeon™ Graphics
- unaffected PhoenixPI-FP8-FP7_1.1.0.3
AMD · AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics
- unaffected RembrandtPI-FP7/FP7r2_1.0.0.B
AMD · AMD Ryzen™ 7045 Series Mobile Processors with Radeon™ Graphics
- unaffected DragonRangeFL1 1.0.0.3e
AMD · AMD Ryzen™ Threadripper™ PRO 3000 WX-Series Processors
- unaffected ChagallWSPI-sWRX8 1.0.0.8
AMD · AMD Ryzen™ 7030 Series Mobile Processors with Radeon™ Graphics
- unaffected CezannePI-FP6_1.0.1.1
AMD · AMD Ryzen™ 8000 Series Desktop Processors
- unaffected ComboAM5 1.2.0.1
AMD · AMD EPYC™ Embedded 7003 Series Processors
- unaffected EmbMilanPI-SP3 1.0.0.9
AMD · AMD EPYC™ Embedded 9004 Series Processors
- unaffected EmbGenoaPI-SP5 1.0.0.9
AMD · AMD Ryzen™ Embedded 8000 Series Processors
- unaffected EmbeddedPhoenixPI-FP7r2_1.2.0.0
AMD · AMD Ryzen™ Embedded 7000 Series Processors
- unaffected EmbeddedAM5PI 1.0.0.3
AMD · AMD Ryzen™ Embedded 5000 Series Processors
- unaffected EmbAM4PI 1.0.0.7
AMD · AMD Ryzen™ Embedded V3000 Series Processors
- unaffected Embedded-PI_FP7r2 100A
References
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-19583 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-21977)Record last updated .