CVE-2022-39908

Local out-of-bounds write via thumbnail decoding race

Published Dec 8, 2022 · Updated Apr 22, 2025

Heap overflow in Samsung Mobile Devices before SMR Dec-2022 Release 1 allows local users to perform an out-of-bounds write during thumbnail decoding. The libsadapter library on Android 10 and 11 and libsthmbcadapter on Android 12 and 13 decode video thumbnails without sufficient input validation or protection against a time-of-check/time-of-use race. Local access and crafted thumbnail-processing input are required; successful exploitation can corrupt heap memory, while Samsung does not report code execution.

CVSS severity6.9
Medium
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap overflow in Samsung Mobile Devices before SMR Dec-2022 Release 1 allows local users to perform an out-of-bounds write during thumbnail decoding. The libsadapter library on Android 10 and 11 and libsthmbcadapter on Android 12 and 13 decode video thumbnails without sufficient input validation or protection against a time-of-check/time-of-use race. Local access and crafted thumbnail-processing input are required; successful exploitation can corrupt heap memory, while Samsung does not report code execution.

The record

CVE
CVE-2022-39908
Published
Dec 8, 2022
Updated
Apr 22, 2025
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Mobile Devices
Classifications
CWE-367
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 8, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 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?

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

  1. Affected versionversion=Q(10) and R(11) OS with libsadapter, S(12) and T(13) OS with libsthmbcadapter <SMR Dec-2022 Release 1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Samsung Electronics Co., Ltd. · Samsung Mobile Devicesversion=Q(10) and R(11) OS with libsadapter, S(12) and T(13) OS with libsthmbcadapter <SMR Dec-2022 Release 1

Published CVSS scores

6.9Samsung MobileCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
7.4NIST NVDCVSS:3.1/AV:L/AC:H/PR:N/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.

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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-367Time-of-check Time-of-use (TOCTOU) Race Condition

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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