CVE-2025-1122

Root persistence via TPM NV_Read out-of-bounds write

Published Apr 15, 2025 · Updated May 8, 2025

Out-of-bounds write in ChromeOS 15753.50.0 on Cr50 boards allows local users with root access to gain persistent boot control. The TPM2 Reference Library's NV_Read handling writes beyond a memory boundary during the challenge-response process. Root privileges and a Cr50-based device are required; successful exploitation bypasses operating-system verification and establishes persistence.

CVSS severity6.7
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in ChromeOS 15753.50.0 on Cr50 boards allows local users with root access to gain persistent boot control. The TPM2 Reference Library's NV_Read handling writes beyond a memory boundary during the challenge-response process. Root privileges and a Cr50-based device are required; successful exploitation bypasses operating-system verification and establishes persistence.

The record

CVE
CVE-2025-1122
Published
Apr 15, 2025
Updated
May 8, 2025
Vendor
Google
Product
ChromeOS
Classifications
CWE-787, T1542.001
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Apr 15, 2025CVE publishedPublication date reported by the CVE source.
  2. May 8, 2025Record 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=15753.50.0 <15753.50.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Google · ChromeOSversion=15753.50.0 <15753.50.0

Published CVSS scores

6.7CISA-ADPCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1542.001Pre-OS Boot: System Firmware

Public exploit references

No public exploit references are available in this record.

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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