CVE-2023-33089
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 · uneditedTransient DOS when processing a NULL buffer while parsing WLAN vdev.
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 confidenceA denial-of-service vulnerability exists in the WLAN vdev (virtual device) parsing code where processing a NULL buffer causes a system crash or hang. The flaw is transient and triggered during wireless virtual device handling.
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 dataall versionsall versionsall versionsall versionsall versionsall versionsall versionsall versionsCVSS 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
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/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 checksWork through these to decide whether this CVE applies to you.
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Identify the Qualcomm chipset modelCheck the device hardware specifications, lspci output, or firmware banner to determine the exact Qualcomm chip (e.g., Fastconnect 6200, Aqt1000, Ar8035, etc.)Affected if The device uses any of the affected chips: Qualcomm 315 5g IoT Modem, Aqt1000, Ar8035, Ar9380, Csr8811, Csrb31024, Fastconnect 6200, or Fastconnect 6700
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Retrieve the installed firmware versionCheck the firmware version string via the device management interface, firmware file metadata, or by querying the chipset (e.g., at commands, manufacturer tools, or system logs)Affected if The firmware version is any version of the listed affected products (all versions are vulnerable)
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Confirm WLAN vdev component is in useVerify that the wireless virtual device (vdev) functionality is active by checking wireless interface status, driver logs, or network configuration where WLAN interfaces are configuredAffected if WLAN virtual device handling is active and processing wireless vdev parameters
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Check for recent vendor firmware updatesQuery the device manufacturer or Qualcomm product security advisories for the availability of patches specific to CVE-2023-33089Affected if No vendor patch addressing this CVE has been applied to the current firmware
The environment is affected if it runs any version of the listed Qualcomm firmware chipsets (315 5g IoT, Aqt1000, Ar8035, Ar9380, Csr8811, Csrb31024, Fastconnect 6200, Fastconnect 6700) with active WLAN vdev functionality and lacks the vendor-specific patch for this NULL pointer validation flaw.
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.
From vendor dataApply vendor patches for the WLAN/vdev component that include proper NULL pointer validation before buffer processing. If no patch is available, implement input validation to reject malformed WLAN vdev parameters.
- Consultation6.0 h
- Implementation4.0 h
- Testing8.0 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 $6,144.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-33089 — 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-2023-33089 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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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.
- 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