CVE-2022-35408

HIGH

8.2

CVSS Score

Published: September 22, 2022 at 03:35 PM UTC

Updated: June 17, 2026 at 04:51 AM UTC

1 product affected across 1 vendorInsydeH2O

Using N/A by N/A?

Get instant alerts when new vulnerabilities affect N/A - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

HIGH8.2

Exploit prediction

EPSS 0.4%

SSVC

PoC

Description

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. An SMM callout vulnerability in the SMM driver in UsbLegacyControlSmm leads to possible arbitrary code execution in SMM and escalation of privileges. An attacker could overwrite the function pointers in the EFI_BOOT_SERVICES table before the USB SMI handler triggers. (This is not exploitable from code running in the operating system.)

Affected

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

InsydeH2O · Insyde

95%

5.0 ≤ v < 05.09.385.1 ≤ v < 5.17.385.2 ≤ v < 05.27.285.3 ≤ v < 05.36.285.4 ≤ v < 05.44.285.5 ≤ v < 05.52.28

Affected range stops below 05.09.38, so it looks safe — our inference, not a vendor statement

Affected range stops below 05.27.28, so it looks safe — our inference, not a vendor statement

Affected range stops below 05.36.28, so it looks safe — our inference, not a vendor statement

Affected range stops below 05.44.28, so it looks safe — our inference, not a vendor statement

Affected range stops below 05.52.28, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.17.38, 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 (3)

x_refsource_MISCExploitThird Party Advisory

Source: [email protected]

https://binarly.io/advisories/BRLY-2022-022/index.html

x_refsource_MISCVendor Advisory

Source: [email protected]

https://www.insyde.com/security-pledge

x_refsource_MISCVendor Advisory

Source: [email protected]

https://www.insyde.com/security-pledge/SA-2022031

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

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

CVSS

8.2HIGHCISA-ADP

Attack Vector: LOCAL
Complexity: LOW
Privileges: HIGH
User Interaction: NONE
Scope: CHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

NVD-CWE-noinfoCWE-123

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card