CVE-2021-30318
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 · uneditedImproper validation of input when provisioning the HDCP key can lead to memory corruption in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Voice & Music, Snapdragon Wearables
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 confidenceImproper input validation during HDCP key provisioning in Qualcomm Snapdragon chipsets allows malformed input to trigger memory corruption. This is a firmware-level vulnerability in the HDCP key provisioning process that could enable privilege escalation or code execution.
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
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/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 Qualcomm chipset model in your deviceCheck device specifications, system information, or hardware documentation to determine the exact Qualcomm chipset model (e.g., Apq8009w, Apq8017, Apq8096au, Aqt1000, Ar8031, Ar8035, Csra6620, Csra6640)Affected if The chipset matches any of the following models: Apq8009w, Apq8017, Apq8096au, Aqt1000, Ar8031, Ar8035, Csra6620, or Csra6640
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Confirm all firmware versions are affectedSince the advisory lists 'all versions' for each affected chipset, any firmware version present on the identified chipset is considered affectedAffected if Any firmware version is installed on one of the listed affected chipsets
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Determine if HDCP key provisioning is in useCheck device settings, system logs, or monitor for HDCP (High-bandwidth Digital Content Protection) key provisioning activity. This may appear in media player settings, display output configurations, or hardware diagnostic logsAffected if HDCP key provisioning functionality is enabled or actively used on the device
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Check for firmware update availabilityContact the device manufacturer or check for firmware updates specific to the chipset model. Firmware-level vulnerabilities often require vendor-supplied updatesAffected if No vendor firmware patch has been applied to address the input validation flaw
Your device is affected if it contains any of the listed Qualcomm chipsets (Apq8009w, Apq8017, Apq8096au, Aqt1000, Ar8031, Ar8035, Csra6620, Csra6640) and uses HDCP key provisioning functionality, as all firmware versions of these chipsets contain the vulnerability.
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 firmware updates from Qualcomm and device manufacturers that address the input validation flaw in HDCP key provisioning. Until patches are available, monitor for unusual provisioning activity.
- Consultation8.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA8.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-30318 — 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-2021-30318 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
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