Improper input validation in Intel Processors
Priority LOW 39CWE-20Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- Present
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.
Summary
Improper input validation in UEFI firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00254 17th percentileScored 2026-11-07
Fix Fixed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Intel(R) Processors | See references | — | No fix listed | CNA |
- Intel(R) Processors Vendor— Affected See references Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | — |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | — |
| Red Hat Enterprise Linux BaseOS AUS (v. 8.2) | Fixed | — |
| Red Hat Enterprise Linux BaseOS AUS (v.8.4) | Fixed | — |
| Red Hat Enterprise Linux BaseOS AUS (v.8.6) | Fixed | — |
| Red Hat Enterprise Linux BaseOS E4S (v.8.4) | Fixed | — |
| Red Hat Enterprise Linux BaseOS E4S (v.8.6) | Fixed | — |
| Red Hat Enterprise Linux BaseOS E4S (v.9.0) | Fixed | — |
| Red Hat Enterprise Linux BaseOS EUS (v.8.8) | Fixed | — |
| Red Hat Enterprise Linux BaseOS EUS (v.9.2) | Fixed | — |
| Red Hat Enterprise Linux BaseOS EUS (v.9.4) | Fixed | — |
| Red Hat Enterprise Linux BaseOS TUS (v.8.4) | Fixed | — |
| Red Hat Enterprise Linux BaseOS TUS (v.8.6) | Fixed | — |
| Red Hat Enterprise Linux Server (v. 7 ELS) | Fixed | — |
| Red Hat Enterprise Linux Server AUS (v. 7.7) | Fixed | — |
Not affected: 1 product
- Red Hat Enterprise Linux 10
Timeline
- 2026-10-02 Threatist record created from CVE-2023-34440
- 2026-10-03 Alias added: GHSA-474w-fcfg-344q
Sources
- CVE-2023-34440 · CVE Program
- CVE-2023-34440 · NVD
- FIRST EPSS
- GHSA-474w-fcfg-344q · GitHub Advisory Database · CC BY 4.0
- CVE-2023-34440 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences