An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5.
Priority LOW 24CWE-20Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Due to insufficient input validation, an attacker can tamper with a runtime-accessible EFI variable to cause a dynamic BAR setting to overlap SMRAM.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00173 6th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:insyde:insydeh2o:5.0:*:*:*:*:*:*:* | 5.0 | Vulnerable | Insyde Software |
| cpe:2.3:a:insyde:insydeh2o:5.1:*:*:*:*:*:*:* | 5.1 | Vulnerable | Insyde Software |
| cpe:2.3:a:insyde:insydeh2o:5.2:*:*:*:*:*:*:* | 5.2 | Vulnerable | Insyde Software |
| cpe:2.3:a:insyde:insydeh2o:5.3:*:*:*:*:*:*:* | 5.3 | Vulnerable | Insyde Software |
| cpe:2.3:a:insyde:insydeh2o:5.4:*:*:*:*:*:*:* | 5.4 | Vulnerable | Insyde Software |
| cpe:2.3:a:insyde:insydeh2o:5.5:*:*:*:*:*:*:* | 5.5 | Vulnerable | Insyde Software |
- cpe:2.3:a:insyde:insydeh2o:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Insyde Software
- cpe:2.3:a:insyde:insydeh2o:5.1:*:*:*:*:*:*:* Versions 5.1 Vulnerable ·Insyde Software
- cpe:2.3:a:insyde:insydeh2o:5.2:*:*:*:*:*:*:* Versions 5.2 Vulnerable ·Insyde Software
- cpe:2.3:a:insyde:insydeh2o:5.3:*:*:*:*:*:*:* Versions 5.3 Vulnerable ·Insyde Software
- cpe:2.3:a:insyde:insydeh2o:5.4:*:*:*:*:*:*:* Versions 5.4 Vulnerable ·Insyde Software
- cpe:2.3:a:insyde:insydeh2o:5.5:*:*:*:*:*:*:* Versions 5.5 Vulnerable ·Insyde Software
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-27373
- 2026-10-03 Alias added: GHSA-79rc-fcmg-3r4m
References
More Insyde Software Insydeh2o vulnerabilities
- TI-2023-08797 An issue was discovered in ChipsetSvcSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. CVSS 3.1HIGH 8.8
- TI-2022-16772 An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. CVSS 3.1HIGH 8.2
- TI-2022-16681 An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. CVSS 3.1HIGH 8.2
- TI-2022-16323 An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. CVSS 3.1HIGH 8.2
- TI-2022-15984 An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. CVSS 3.1HIGH 8.2
- TI-2023-08799 An issue was discovered in Insyde InsydeH2O with kernel 5.2 through 5.5. CVSS 3.1HIGH 7.8
Sources
- CVE-2023-27373 · CVE Program
- CVE-2023-27373 · NVD
- FIRST EPSS
- GHSA-79rc-fcmg-3r4m · GitHub Advisory Database · CC BY 4.0
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