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CVE-2023-47252

MEDIUM
6.3
CVSS Score
Published: April 26, 2024 at 12:00 AM UTC
Updated: June 17, 2026 at 06:32 AM UTC
1 product affected across 1 vendorKernel

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Severity
MEDIUM6.3
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

An issue was discovered in PnpSmm in Insyde InsydeH2O with kernel 5.0 through 5.6. There is a possible out-of-bounds access in the SMM communication buffer, leading to tampering. The PNP-related SMI sub-functions do not verify data size before getting it from the communication buffer, which could lead to possible circumstances where the data immediately following the command buffer could be destroyed with a fixed value. This is fixed in kernel 5.2 v05.28.45, kernel 5.3 v05.37.45, kernel 5.4 v05.45.45, kernel 5.5 v05.53.45, and kernel 5.6 v05.60.45.

Affected

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

Kernel· Insyde
95%
5.2 ≤ v < 5.28.455.3 ≤ v < 5.37.455.4 ≤ v < 5.45.455.5 ≤ v < 5.53.455.6 ≤ v < 5.60.45
Affected range stops below 5.28.45, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.37.45, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.45.45, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.53.45, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.60.45, 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 (1)

Vendor Advisory
Source: [email protected]
https://www.insyde.com/security-pledge/SA-2023067

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

6.3MEDIUMCISA-ADP
Attack Vector
LOCAL
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-787

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