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CVE-2023-34195

HIGH
7.8
CVSS Score
Published: September 18, 2023 at 12:00 AM UTC
Updated: June 17, 2026 at 06:03 AM UTC
1 product affected across 1 vendorInsydeH2O

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

An issue was discovered in SystemFirmwareManagementRuntimeDxe in Insyde InsydeH2O with kernel 5.0 through 5.5. The implementation of the GetImage method retrieves the value of a runtime variable named GetImageProgress, and later uses this value as a function pointer. This variable is wiped out by the same module near the end of the function. By setting this UEFI variable from the OS to point into custom code, an attacker could achieve arbitrary code execution in the DXE phase, before several chipset locks are set.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

InsydeH2O· Insyde
95%
5.2 ≤ v < 5.2.05.28.225.3 ≤ v < 5.3.05.37.225.4 ≤ v < 5.4.05.45.225.5 ≤ v < 5.5.05.53.225.6 ≤ v < 5.6.05.60.22
Affected range stops below 5.2.05.28.22, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.3.05.37.22, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.4.05.45.22, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.5.05.53.22, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.6.05.60.22, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor Advisory
Source: [email protected]
https://www.insyde.com/security-pledge
Vendor Advisory
Source: [email protected]
https://www.insyde.com/security-pledge/SA-2023052

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfoCWE-94

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