CVE-2024-52878

HIGH

7.5

CVSS Score

Published: May 15, 2025 at 12:00 AM UTC

Updated: June 17, 2026 at 08:07 AM UTC

1 product affected across 1 vendorInsydeH2O

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Severity

HIGH7.5

Exploit prediction

EPSS 0.5%

SSVC

No known exploit

Description

An issue was discovered in Insyde InsydeH2O kernel 5.2 before version 05.29.50, kernel 5.3 before version 05.38.50, kernel 5.4 before version 05.46.50, kernel 5.5 before version 05.54.50, kernel 5.6 before version 05.61.50, and kernel 5.7 before version 05.70.50. In VariableRuntimeDxe driver, VariableServicesSetVariable () can be called by gRT_>SetVariable () or the SmmSetSensitiveVariable () or SmmInternalSetVariable () from SMM. In VariableServicesSetVariable (), it uses StrSize () to get variable name size, uses StrLen () to get variable name length and uses StrCmp () to compare strings. These actions may cause a buffer over-read.

Affected

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

InsydeH2O · Insyde

95%

5.2 ≤ v < 5.2.05.29.505.3 ≤ v < 5.3.05.38.505.4 ≤ v < 5.4.05.46.505.5 ≤ v < 5.5.05.54.505.6 ≤ v < 5.6.05.61.505.7 ≤ v < 5.7.05.70.50

Affected range stops below 5.2.05.29.50, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.3.05.38.50, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.4.05.46.50, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.5.05.54.50, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.6.05.61.50, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.7.05.70.50, 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-2024016/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

7.5HIGHCISA-ADP

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: NONE
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-126

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