CVE-2024-20818

Buffer overflow via unchecked write in svc1td_vld_elh

Published Feb 6, 2024 · Updated Jun 17, 2025

Out-of-bounds write in libsthmbc.so in Samsung Mobile Devices before SMR Feb-2024 Release 1 allows local users to trigger a buffer overflow. Samsung identifies svc1td_vld_elh as the faulty routine and states that missing check logic permits the write to exceed its destination buffer. Triggering requires local access and user interaction; published details do not identify the input format or execution path, and the bounded result is memory corruption.

CVSS severity6.6
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in libsthmbc.so in Samsung Mobile Devices before SMR Feb-2024 Release 1 allows local users to trigger a buffer overflow. Samsung identifies svc1td_vld_elh as the faulty routine and states that missing check logic permits the write to exceed its destination buffer. Triggering requires local access and user interaction; published details do not identify the input format or execution path, and the bounded result is memory corruption.

The record

CVE
CVE-2024-20818
Published
Feb 6, 2024
Updated
Jun 17, 2025
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Mobile Devices
Classifications
CWE-787
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 17, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Samsung Electronics Co., Ltd. · Samsung Mobile DevicesAffected versions are unavailable in this record.

Published CVSS scores

6.6Samsung MobileCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L
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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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