CVE-2023-43513
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 · uneditedMemory corruption while processing the event ring, the context read pointer is untrusted to HLOS and when it is passed with arbitrary values, may point to address in the middle of ring element.
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 memory corruption vulnerability exists in event ring processing where an attacker-controlled context read pointer can be passed with arbitrary values, allowing it to point to any address within a ring element rather than the expected element boundary. This enables out-of-bounds memory access leading to potential 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 if the system uses an affected Qualcomm firmware componentInventory the hardware or firmware present on the system. Look for one of the following Qualcomm chips: 315 5G IoT Modem, Apq8017, Aqt1000, Ar8031, Ar8035, C V2X 9150, Csra6620, or Csra6640. This may be listed in device specs, kernel modules, bootloader info, or system firmware dumps.Affected if Any of the listed Qualcomm firmware components are present on the system
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Confirm the presence of event ring processing functionalityExamine the firmware or driver code associated with the Qualcomm chip. Look for event ring or ring buffer data structures used in data path processing, particularly in functions handling context reads or descriptor processing.Affected if The firmware implements event ring processing where context read pointers are used to access ring elements
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Check for context read pointer validation in firmwareAnalyze the firmware binary or source code for the event ring handler. Specifically inspect the code paths where the context read pointer is calculated or used to access memory within a ring element. Look for bounds checking or alignment validation before memory access.Affected if The firmware lacks rigorous validation of the context read pointer to ensure it points to the start of a valid ring element boundary before processing, or if such validation is missing entirely
If the system contains any of the listed Qualcomm firmware components (315 5G IoT Modem, Apq8017, Aqt1000, Ar8031, Ar8035, C V2X 9150, Csra6620, or Csra6640) and those components use event ring processing, the environment is affected by this vulnerability since all versions are impacted.
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 dataImplement rigorous validation of the context read pointer to ensure it always points to the start of a valid ring element boundary before processing, rejecting any values that would result in misaligned or out-of-bounds access.
- Consultation3.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,568.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-43513 — 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-2023-43513 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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- Version or environment caveats, and links to real fixes
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