CVE-2021-30329
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 · uneditedPossible assertion due to improper validation of TCI configuration in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile
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 vulnerability in Qualcomm Snapdragon chipsets allows an attacker to trigger an assertion failure through improper validation of TCI (likely Telecom/Communication Interface) configuration. The lack of proper input validation enables a crafted configuration to cause the system to assert, potentially resulting in denial of service or unstable behavior.
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.
-
Identify installed Qualcomm chipset modelExamine system hardware inventory, device tree, or kernel modules to determine if any of the following are present: Ar8035, Qca6390, Qca6391, Qca6426, Qca6436, Qca6574a, Qca6574au, or Qca6595au. On Linux, check `lspci`, `lsusb`, or `/proc/device-tree/` for network or wireless adapters.Affected if Any of the listed Qualcomm chipset models are present in the system
-
Check firmware version of Qualcomm componentRetrieve the firmware version from the device or chipset. This may be available via `ethtool`, `iw`, `cat /sys/class/net/*/device/firmware_version`, or vendor-specific diagnostic tools. Compare the version against the affected product list.Affected if The firmware is from the Qca or Ar product families listed (all versions are affected)
-
Verify TCI interface is accessible or enabledCheck system configuration to determine if the Telecom/Communication Interface (TCI) is enabled. This may involve examining kernel modules, device configuration files, or system logs that indicate TCI initialization. Look for relevant kernel parameters or driver configurations.Affected if TCI interface is active and processes external configuration input
-
Review system logs for assertion failuresExamine system logs (dmesg, kernel logs, /var/log/messages) for any assertion failure messages, crashes, or instability related to the Qualcomm chipset or TCI configuration. Search for keywords like 'assert', 'TCI', 'firmware crash', or chipset-specific errors.Affected if Assertion failures or system instability tied to the Qualcomm chipset component are observed
If the system contains any of the affected Qualcomm chipset models (Ar8035, Qca6390, Qca6391, Qca6426, Qca6436, Qca6574a, Qca6574au, Qca6595au) and the TCI interface is enabled, the environment is likely affected by this 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-provided firmware updates from Qualcomm through device manufacturers. TCI configuration parameters should be validated and sanitized before being processed by the system.
- Consultation8.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA8.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $12,352.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-30329 — 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-2021-30329 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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