CVE-2021-26344 json
An out of bounds memory write when processing the AMD PSP1 Configuration Block (APCB) could allow an attacker with access the ability to mo…
published 2024-08-13 2 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13150
- cvss
- 7.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 5%
- public exploits
- 0
- none known
Summary
An out of bounds memory write when processing the AMD PSP1 Configuration Block (APCB) could allow an attacker with access the ability to modify the BIOS image, and the ability to sign the resulting image, to potentially modify the APCB block resulting in arbitrary code execution.
Patch / fix
- AMD AMD EPYC™ 7002 Series Processors RomePI 1.0.0.C
- AMD AMD EPYC™ 7003 Series Processors MilanPI 1.0.0.5
- AMD AMD Ryzen™ 5000 Series Desktop Processors ComboAM4V2 1.2.0.A
- AMD AMD Ryzen™ 5000 Series Desktop Processor with Radeon™ Graphics ComboAM4V2 1.2.0.A
- AMD AMD Ryzen™ Threadripper™ PRO 5000WX Processors ChagallWSPI-sWRX8 1.0.0.6
- AMD AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics CezannePI-FP6 1.0.0.E
- AMD AMD Ryzen™ 7020 Series Processors with Radeon™ Graphics MendocinoPI-FT6 1.0.0.3
- AMD AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics RembrandtPI-FP7 1.0.0.7
- AMD AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics RembrandtPI-FP7 1.0.0.7
- AMD AMD Ryzen™ 5000 Series Processors with Radeon™ Graphics CezannePI-FP6 1.0.0.E
- AMD AMD Ryzen™ 3000 Series Processors with Radeon™ Graphics CezannePI-FP6 1.0.0.E
- AMD AMD EPYC™ Embedded 7002 Series Processors EmbRomePI-SP3 1.0.0.6
- AMD AMD EPYC™ Embedded 7003 Series Processors EmbMilanPI-SP3 1.0.0.2
- AMD AMD Ryzen™ Embedded V3000 Series Processors EmbeddedPI-FP7r2 1.0.0.4
- amd naplespi 1.0.0.k
- amd romepi 1.0.0.C
- amd milanpi 1.0.0.5
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 y ago
Exploit prediction
0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.2 | CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H |
| NVD | 3.1 | 8.2 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
Affected products
- AMD AMD EPYC™ 7001 Series Processors
- AMD AMD EPYC™ 7002 Series Processors
- AMD AMD EPYC™ 7003 Series Processors
- AMD AMD Ryzen™ 3000 Series Desktop Processors
- AMD AMD Ryzen™ 5000 Series Desktop Processors
- AMD AMD Ryzen™ 5000 Series Desktop Processor with Radeon™ Graphics
- AMD AMD Athlon™ 3000 Series Desktop Processors with Radeon™ Graphics
- AMD AMD Ryzen™ 4000 Series Desktop Processors with Radeon™ Graphics
- AMD AMD Ryzen™ Threadripper™ 3000 Series Processors
- AMD AMD Ryzen™ Threadripper™ PRO 5000WX Processors
- AMD AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics
- AMD AMD Ryzen™ 3000 Series Mobile Processors with Radeon™ Graphics
- AMD AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics
- AMD AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics
- AMD AMD Ryzen™ 7020 Series Processors with Radeon™ Graphics
- AMD AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics
- AMD AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics
- AMD AMD Ryzen™ 5000 Series Processors with Radeon™ Graphics
- AMD AMD Ryzen™ 3000 Series Processors with Radeon™ Graphics
- AMD AMD EPYC™ Embedded 7002 Series Processors
- AMD AMD EPYC™ Embedded 3000 Series Processors
- AMD AMD EPYC™ Embedded 7003 Series Processors
- AMD AMD Ryzen™ Embedded R1000 Series Processors
- AMD AMD Ryzen™ Embedded R2000 Series Processors
- AMD AMD Ryzen™ Embedded 5000 Series Processors
- AMD AMD Ryzen™ Embedded V1000 Series Processors
- AMD AMD Ryzen™ Embedded V2000 Series Processors
- AMD AMD Ryzen™ Embedded V3000 Series Processors
- amd naplespi
- amd romepi
- amd milanpi
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
amd.com
/en/resources/product-security/bulletin/amd-sb-3003.html
vendor-advisory
Sources
- CVE List CVE-2021-26344
- NVD CVE-2021-26344
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