CVE-2022-27541
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedPotential Time-of-Check to Time-of Use (TOCTOU) vulnerabilities have been identified in the HP BIOS for certain HP PC products which may allow arbitrary code execution, denial of service, and information disclosure.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceThis is a Time-of-Check to Time-of-Use (TOCTOU) race condition vulnerability in HP BIOS firmware. The flaw allows an attacker to exploit the time window between when the system checks a condition (e.g., code integrity) and when it uses that checked resource, potentially enabling arbitrary code execution, denial of service, or information disclosure.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data<= 1.24<= 1.33<= 1.42<= 1.42<= 1.42<= 1.42<= 1.42<= 1.42CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- High
- Privileges
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify the HP system modelRun 'wmic baseboard get product,manufacturer' or check the system label/BIOS during bootAffected if The model does not match one of: HP Zcentral 4r, HP Z1 All In One G3, HP Elitebook 725 G4, HP Elitebook 745 G4, HP Elitebook 755 G4, HP Probook 645 G3, HP Probook 655 G3, HP Mt43 Mobile Thin Client
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Determine the installed BIOS firmware versionRun 'wmic bios get smbiosbiosversion' or access BIOS setup during boot to view the BIOS versionAffected if Unable to retrieve a BIOS version number from the system
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Compare BIOS version against affected range for your modelMatch your model from step 1 to its affected version: Zcentral 4r <=1.24, Z1 G3 <=1.33, Elitebook 725/745/755 G4 <=1.42, Probook 645/655 G3 <=1.42, Mt43 <=1.42Affected if The installed BIOS version number is less than or equal to the listed version for your specific model
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Confirm BIOS is the original vendor firmwareVerify the BIOS has not been modified by third-party firmware or custom BIOS implementationsAffected if The system is running a non-HP or modified BIOS that does not match the official HP firmware versions
You are affected if you own one of the listed HP models and your current BIOS firmware version is at or below the version threshold specified for that model.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scopedApply HP BIOS updates released to address this vulnerability. Organizations should identify affected HP PC products, test updates in controlled environments, and deploy them across the enterprise through their patch management infrastructure.
Update to the latest available BIOS firmware version from HP for each respective model (versions > 1.24, 1.33, or 1.42 depending on product)
- 1. Identify the exact model of the affected HP device from the list: Zcentral 4r Workstation, Z1 All In One G3, Elitebook 725/745/755 G4, Probook 645/655 G3, or Mt43 Mobile Thin Client
- 2. Navigate to HP Support (support.hp.com) and enter the specific product model number
- 3. Locate the BIOS/Firmware section for the device
- 4. Download the latest BIOS/firmware version available (versions greater than those listed: 1.24 for Zcentral 4r, 1.33 for Z1 All In One G3, 1.42 for other models)
- 5. Follow HP's instructions to update the BIOS - this typically requires running the HP BIOS Update utility from Windows or creating a USB recovery key
- 6. Ensure the device is connected to power during the BIOS update process to prevent interruption
- 7. After updating, verify the BIOS version has been successfully incremented
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation8.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $11,200.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-27541 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2022-27541 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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