hw: amd: failure to sanitize input in SMM
Published Feb 13, 2024
8.4
HIGHCVSS 3.1
EPSS 0.17%
Description
Improper Access Control in System Management Mode (SMM) may allow an attacker access to the SPI flash potentially leading to arbitrary code execution.
Affected products
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Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
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| AMD | 1st Gen AMD EPYC™ Processors | affected |
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| AMD | 2nd Gen AMD EPYC™ Processors | unaffected |
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| AMD | 3rd Gen AMD EPYC™ Processors | unaffected |
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| AMD | 4th Gen AMD EPYC™ Processors | unaffected |
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| AMD | AMD EPYC(TM) Embedded 3000 | unaffected |
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| AMD | AMD EPYC(TM) Embedded 7002 | unaffected |
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| AMD | AMD EPYC(TM) Embedded 7003 | unaffected |
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| AMD | AMD EPYC(TM) Embedded 9003 | unaffected |
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No data.
No data.
Red Hat Enterprise Linux 7
linux-firmware
Not affected
Red Hat Enterprise Linux 8
linux-firmware
Not affected
Red Hat Enterprise Linux 9
linux-firmware
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | linux-firmware | Not affected | n/a |
| Red Hat Enterprise Linux 8 | linux-firmware | Not affected | n/a |
| Red Hat Enterprise Linux 9 | linux-firmware | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
The PSP and AEGIS vulnerabilities necessitate a BIOS update, as they are not inherent to the CPU and cannot be addressed through CPU microcode updates. This requires a UEFI firmware update from the device vendor, distinct from updates in the linux-firmware package. Therefore, linux-firmware on Red Hat Enterprise Linux is marked as not affected.
Red Hat mitigation
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
1 other source (Red Hat) ▾
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Feb 14, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2024–2026- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (6 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.17% (0.00173) | 6.01th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.17% (0.00173) | 6.94th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.10% (0.00105) | 26.19th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00043) | 10.81th | v3 (v2023.03.01) |
| May 27, 2024 | 0.04% (0.00043) | 8.70th | v3 (v2023.03.01) |
| Feb 14, 2024 | 0.04% (0.00043) | 6.69th | v3 (v2023.03.01) |
References (6)
- https://access.redhat.com/security/cve/CVE-2023-20587 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2263402 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2023-20587
- https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-7009 vendor-advisory
- https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7009.html
- https://www.cve.org/CVERecord?id=CVE-2023-20587
Change history (0)
No recorded changes yet.