CVE-2023-3487

Memory disclosure and corruption via storage-slot overflow

Published Oct 20, 2023 · Updated Sep 25, 2024

Integer overflow in Silicon Labs Gecko Bootloader 4.3.1 and earlier allows local users to read or write memory via storage-slot requests. The storage-slot read and write paths perform an overflowing integer calculation on caller-supplied request values, so access is not confined to the selected slot. Reachability requires local invocation of the bootloader storage interface; successful requests expose or alter adjacent memory without a reported service interruption.

CVSS severity7.7
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Silicon Labs Gecko Bootloader 4.3.1 and earlier allows local users to read or write memory via storage-slot requests. The storage-slot read and write paths perform an overflowing integer calculation on caller-supplied request values, so access is not confined to the selected slot. Reachability requires local invocation of the bootloader storage interface; successful requests expose or alter adjacent memory without a reported service interruption.

The record

CVE
CVE-2023-3487
Published
Oct 20, 2023
Updated
Sep 25, 2024
Vendor
Sigma Designs
Product
Gecko SDK (GSDK)
Classifications
CWE-125, CWE-190, CWE-787
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0 <=4.3.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Sigma Designs · Gecko SDK (GSDK)version=1.0 <=4.3.1
Silicon Laboratories · Gecko Bootloaderversion=0 <=4.3.1

Published CVSS scores

7.7Silicon LabsCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
CWE-190Integer Overflow or Wraparound
CWE-787Out-of-bounds Write

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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