CVE-2021-30259
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 out of bound access due to improper validation of function table entries in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, 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 confidenceOut of bounds memory access vulnerability in Qualcomm Snapdragon chipsets stemming from improper validation of function table entries. This could allow an attacker to corrupt memory, potentially leading to code execution or denial of service.
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 the deviceCheck device documentation, system boot logs, or run commands such as dmesg, lspci, cat /proc/cpuinfo, or manufacturer-specific tools to determine the exact Qualcomm chipset or firmware module nameAffected if The chipset model matches Aqt1000, Ar8031, Ar8035, Csra6620, Csra6640, Csrb31024, Mdm9150, or Mdm9205
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Verify the firmware versionQuery the device or firmware for its version number using vendor-specific diagnostic tools, boot logs, or by accessing the firmware information through /sys or /proc interfaces if availableAffected if Any firmware version is installed on an affected chipset (all versions are vulnerable)
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Check if function table validation is in useThis vulnerability stems from improper validation of function table entries in the firmware. Consult vendor documentation or firmware release notes to confirm whether the specific firmware includes the vulnerable code pathAffected if The firmware contains the vulnerable function table validation logic (present in all versions of affected chipsets)
If the device contains any of the affected Qualcomm chipset models (Aqt1000, Ar8031, Ar8035, Csra6620, Csra6640, Csrb31024, Mdm9150, Mdm9205) and runs their firmware, the environment is affected since all 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-supplied firmware patches from Qualcomm for affected Snapdragon platforms. Contact device OEMs for platform-specific updates.
- Consultation8.0 h
- Implementation24.0 h
- Testing16.0 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 $15,616.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-30259 — 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-2021-30259 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
- No spam, self-promotion, credentials, or personal data