CVE-2020-11266
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 · uneditedImage address is dereferenced before validating its range which can cause potential QSEE information leakage in 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 bounds checking vulnerability exists where an image memory address is dereferenced (accessed) before validating that it falls within an acceptable memory range. This improper validation can allow an attacker to read memory contents from the Qualcomm Secure Execution Environment (QSEE), resulting in information leakage.
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
- Changed
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
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 modelCheck the device documentation, system firmware information, or boot logs for the chipset identifier. Common commands include 'dmesg', 'cat /proc/cpuinfo', or checking the device's BOM (Bill of Materials) specifications.Affected if The chipset model matches one of: Ar7420, Ar9580, Csr8811, Ipq4018, Ipq4019, Ipq4028, Ipq4029, or Qca10901
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Verify QSEE is present on the deviceCheck if the Qualcomm Secure Execution Environment (QSEE) is running or available on the system. This may be visible in kernel logs, tee driver information, or by checking for QSEE-related processes or modules.Affected if QSEE/TEE (Trusted Execution Environment) is present and active on the device with one of the affected chipsets
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Check for QSEE memory access functionalityReview any application logs or debugging outputs that interact with QSEE services. If the device has developer or diagnostic modes enabled, examine any QSEE-related API calls or memory handling code.Affected if The device exposes QSEE services or interfaces that could trigger the bounds checking flaw when processing image memory addresses
The device is affected if it uses any of the listed Qualcomm chipset models (Ar7420, Ar9580, Csr8811, Ipq4018, Ipq4019, Ipq4028, Ipq4029, Qca10901) and has QSEE enabled, since all firmware versions for these chipsets are vulnerable.
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 for affected Snapdragon Wired Infrastructure and Networking devices. Contact the device manufacturer for specific patch availability.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-11266 — 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-2020-11266 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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