CVE-2021-30272
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 null pointer dereference in thread cache operation handler due to lack of validation of user provided input in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Voice & Music, Snapdragon Wearables, Snapdragon Wired Infrastructure and Networking
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 null pointer dereference vulnerability exists in the thread cache operation handler of multiple Qualcomm Snapdragon chip families. The vulnerability stems from insufficient validation of user-supplied input before using it in pointer operations. Successful exploitation could cause a system crash (denial of service) or potentially enable arbitrary code execution depending on memory layout and context.
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 chip model in your systemRetrieve system/hardware information using commands such as 'cat /proc/cpuinfo', 'lspci', 'dmesg', or check device/system documentation to determine the exact Qualcomm Snapdragon chipset or module part numberAffected if The displayed chipset matches any of the following: Apq8009w, Apq8017, Apq8096au, Ar8031, Ar8035, Csr8811, Csra6620, or Csra6640
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Verify firmware version of the affected chipConsult device firmware information through vendor-specific tools, system logs, or hardware diagnostics that report the current firmware version for the identified Qualcomm componentAffected if Any firmware version is present on a chip from the affected list (all versions are vulnerable)
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Determine if thread cache operation handler is in useMonitor system behavior or review module/component listings related to thread cache operations. Check if any application or service actively invokes thread cache functionality on the Qualcomm componentAffected if Thread cache operations are actively utilized on the affected chip, as the vulnerability exists in the thread cache operation handler
Your environment is affected if your system incorporates any of the listed Qualcomm chip models (Apq8009w, Apq8017, Apq8096au, Ar8031, Ar8035, Csr8811, Csra6620, Csra6640) regardless of firmware version, since all versions of these chips contain the vulnerable thread cache operation handler.
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-supplied firmware updates from Qualcomm or downstream device manufacturers that address this vulnerability. Until patches are available, monitor for unusual behavior in thread/cache operations and restrict untrusted input from reaching affected components.
- Consultation8.0 h
- Implementation40.0 h
- Testing24.0 h
- Review / QA16.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $24,448.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-30272 — 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-2021-30272 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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