CVE-2021-30295
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 heap overflow due to improper validation of local variable while storing current task information locally in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, 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 · moderate confidenceHeap overflow vulnerability in Qualcomm Snapdragon chipsets due to improper validation of a local variable when storing current task information locally. This memory corruption issue in the firmware could allow local attackers to execute arbitrary code or cause 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 system information via `cat /proc/cpuinfo` on embedded devices, or review device specifications, bootloader logs, or `dmesg` output for chipset identifiers such as APQ8017, APQ8053, AQT1000, AR8031, CSRA6620, CSRA6640, CSRB31024, or FSM10055Affected if The chipset matches any of these model identifiers: APQ8017, APQ8053, AQT1000, AR8031, CSRA6620, CSRA6640, CSRB31024, or FSM10055
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Determine the firmware version for the identified chipsetQuery the firmware version through vendor-specific interfaces, bootloader information, or device management interfaces. For some modules, this may be visible in `/sys/firmware` or via `cat /proc/version` on embedded systemsAffected if The installed firmware version cannot be determined to be patched, since all versions of the listed firmware are affected
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Verify the vulnerable code path is reachableConfirm the device firmware is actively running and the component that handles task information storage is operational. This may require access to firmware debugging interfaces or vendor diagnostic toolsAffected if The firmware is actively running and the task information storage functionality is enabled
If the device uses any of the listed Qualcomm chipset firmware variants (APQ8017, APQ8053, AQT1000, AR8031, CSRA6620, CSRA6640, CSRB31024, FSM10055) with unmodified vendor firmware, the environment is affected since all versions of these firmware images 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 and security updates for affected Snapdragon devices. Contact device manufacturers for specific patch availability.
- 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-2021-30295 — 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-2021-30295 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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