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V20 Pro L 01j FirmwareOperating system · Nttdocomo

CVE-2019-5914

MEDIUM · 5.3 CVSS v3.0 Published 2019-02-13
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
58/100
Remediation priority · Elevated
No privileges Zero-click

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 · unedited
V20 PRO L-01J software version L01J20c and L01J20d has a NULL pointer exception flaw that can be used by an attacker to cause the device to crash on the same network range via a specially crafted access point.

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 · high confidence

The LG V20 PRO L-01J device running software versions L01J20c and L01J20d contains a NULL pointer exception vulnerability in its WiFi/network stack. When the device connects to or scans for a specially crafted malicious access point on the same network range, the device attempts to dereference a NULL pointer, causing a system crash and denial of service.

MitigationApply any available vendor firmware update from LG for this device. As a workaround, avoid connecting to untrusted or unfamiliar WiFi access points and disable WiFi auto-connect features.

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
V20 Pro L 01j FirmwareOperating system
Affected:= l01j20c= l01j20d

CVSS 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
Adjacent
Complexity
High
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/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 checks

Work through these to decide whether this CVE applies to you.

  1. Confirm device model is LG V20 Pro L-01J
    Check the device settings under Settings > About Phone > Model Number, or check the physical device labeling for the model number L-01J or V20 Pro
    Affected if Device is not the LG V20 Pro L-01J (NTT Docomo variant)
  2. Verify firmware version
    Navigate to Settings > About Phone > Software Information > Firmware Version, or dial *#06# to check the software version. The exact version string must be either l01j20c or l01j20d (case-insensitive)
    Affected if Firmware version is NOT exactly L01J20c or L01J20d
  3. Confirm WiFi is enabled
    Check the device status bar for the WiFi icon, or verify in Settings > Network & Internet > Wi-Fi that WiFi is turned ON
    Affected if WiFi is disabled on the device

If the device is an LG V20 Pro L-01J running exactly firmware L01J20c or L01J20d and has WiFi enabled, the device is affected by this vulnerability.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply any available vendor firmware update from LG for this device. As a workaround, avoid connecting to untrusted or unfamiliar WiFi access points and disable WiFi auto-connect features.

Fix this in V20 Pro L 01j Firmware Scoped from the published advisory
  • Consultation2.0 h
  • Testing1.0 h
  • Review / QA1.0 h
4.0 hours of engineering $750
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2019-5914 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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
  • No spam, self-promotion, credentials, or personal data