CVE-2023-21511

Arbitrary memory read via Bitcoin UTXO command processing

Published May 4, 2023 · Updated Feb 12, 2025

An out-of-bounds read in the bc_core trustlet in Samsung Blockchain Keystore before 1.3.12.1 allows local users to read arbitrary memory. The bc_core trustlet reads beyond the intended buffer while processing the CMD_COLDWALLET_BTC_SET_PRV_UTXO command. Exploitation requires high local privileges on a supported Galaxy device and exposes memory confidentiality without reported data modification or service interruption.

CVSS severity4.4
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

An out-of-bounds read in the bc_core trustlet in Samsung Blockchain Keystore before 1.3.12.1 allows local users to read arbitrary memory. The bc_core trustlet reads beyond the intended buffer while processing the CMD_COLDWALLET_BTC_SET_PRV_UTXO command. Exploitation requires high local privileges on a supported Galaxy device and exposes memory confidentiality without reported data modification or service interruption.

The record

CVE
CVE-2023-21511
Published
May 4, 2023
Updated
Feb 12, 2025
Vendor
Samsung Electronics
Product
Samsung Blockchain Keystore
Classifications
CWE-125
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. May 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 12, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=unspecified <1.3.12.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Samsung Electronics · Samsung Blockchain Keystoreversion=unspecified <1.3.12.1

Published CVSS scores

4.4Samsung MobileCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo