CVE-2023-3488
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 · uneditedUninitialized buffer in GBL parser in Silicon Labs GSDK v4.3.0 and earlier allows attacker to leak data from Secure stack via malformed GBL file.
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 confidenceUninitialized buffer in the GBL (Gecko Bootloader) parser of Silicon Labs GSDK v4.3.0 and earlier allows a malformed GBL file to trigger a buffer read operation without proper initialization, enabling leakage of data from the Secure stack memory region.
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 data<= 4.3.0CVSS 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
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/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 GSDK version in useInspect the SDK installation directory or build artifacts for version metadata. Look for version files, release notes, or check the SDK header files that define the GSDK version number.Affected if The installed or referenced GSDK version is 4.3.0 or earlier
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Confirm Gecko Bootloader (GBL) is enabledReview the project configuration files or build settings to determine if the GBL bootloader component is included in the firmware build.Affected if GBL bootloader is present in the firmware configuration
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Check if device accepts GBL update filesExamine the device firmware or documentation to determine if the bootloader is configured to accept and parse GBL-formatted update files (for example, during OTA updates or firmware upgrades).Affected if The bootloader is configured to parse incoming GBL files
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Verify bootloader configurationInspect the bootloader configuration files or memory layout to confirm whether the GBL parser component is active and which memory regions it can access.Affected if GBL parser is active and the device handles GBL files from external sources
A user is affected if the GSDK version is 4.3.0 or earlier AND the Gecko Bootloader with GBL parsing capability is enabled in the firmware, allowing the device to process potentially untrusted GBL files.
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.
dbcve · scopedUpdate Silicon Labs GSDK to a version newer than v4.3.0 (once available from vendor) and deploy patched firmware to all affected embedded devices.
Gecko Software Development Kit 4.3.1 or later
- Obtain Gecko Software Development Kit version 4.3.1 or later from the official Silicon Labs distribution channels
- Replace the existing GSDK installation with version 4.3.1 or newer
- Rebuild any affected applications with the updated SDK
- Verify that the GBL parser correctly handles the updated library version
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 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 $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-3488 — 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-2023-3488 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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