CVE-2023-21626
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 · uneditedCryptographic issue in HLOS due to improper authentication while performing key velocity checks using more than one key.
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 confidenceThis is a cryptographic authentication bypass vulnerability in High-Level Operating System (HLOS) mobile devices. The flaw occurs in the key velocity checking mechanism when multiple cryptographic keys are used simultaneously, where improper authentication allows the velocity check to be bypassed or manipulated.
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
- None
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 device chipset modelCheck the device specifications or system information to determine the Qualcomm chipset model (Apq8009, Apq8017, Apq8037, Aqt1000, Ar8035, Csra6620, Csra6640, or Csrb31024)Affected if The chipset matches any of the eight affected models listed in the CVE
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Check the current firmware versionAccess the device firmware information through system settings, boot loader, or manufacturer documentation to retrieve the installed firmware version stringAffected if The firmware version is earlier than the vendor-supplied patch date for CVE-2023-21626, or if the firmware version is not confirmed as patched by the vendor
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Verify if multiple cryptographic keys are in useInspect the device cryptographic configuration or audit logs to determine if multiple cryptographic keys are being used simultaneously in any cryptographic operationAffected if The device uses multiple cryptographic keys concurrently and the firmware has not been patched to address the key velocity check bypass vulnerability
A device is affected if it uses any of the eight listed Qualcomm chipset models and its firmware predates the vendor security patch for CVE-2023-21626, particularly when multiple cryptographic keys are operated simultaneously
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 the vendor-supplied security patch for CVE-2023-21626; this is an OS-level cryptographic fix that requires updating the device firmware to the patched version.
- Consultation4.0 h
- Implementation8.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,656.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-21626 — 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-2023-21626 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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