CVE-2022-23924Public exploit

Local SMM code execution via heap buffer overflow

Published Mar 11, 2022 · Updated Aug 3, 2024

Heap buffer overflow in the child SW SMI handler in HP PC BIOS before 02.07.10 allows local users to execute code in SMM. The handler copies an attacker-sized wide string into a heap buffer allocated to the smaller FactoryConfig or BuildId NVRAM value. Exploitation requires ring-0 access and can corrupt SMM memory, bypass firmware protections, and install code that persists across operating system reinstalls.

CVSS severity8.2
High
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in the child SW SMI handler in HP PC BIOS before 02.07.10 allows local users to execute code in SMM. The handler copies an attacker-sized wide string into a heap buffer allocated to the smaller FactoryConfig or BuildId NVRAM value. Exploitation requires ring-0 access and can corrupt SMM memory, bypass firmware protections, and install code that persists across operating system reinstalls.

The record

CVE
CVE-2022-23924
Published
Mar 11, 2022
Updated
Aug 3, 2024
Vendor
Plantronics
Product
HP PC BIOS
Classifications
T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Mar 11, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=before 02.07.10 (S05, S15 BIOS)

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Plantronics · HP PC BIOSversion=before 02.07.10 (S05, S15 BIOS)

Published CVSS scores

7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C
8.2NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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