CVE-2024-20849

Local code execution via unsafe chunk parsing

Published Apr 2, 2024 · Updated Aug 27, 2024

Out-of-bounds write in libsdffextractor on Samsung Mobile Devices before SMR Apr-2024 Release 1 allows local users to execute arbitrary code. The chunk parser writes outside its intended memory buffer while processing chunk data; Samsung has not disclosed the responsible function or faulty calculation. Exploitation requires local access to reach the extractor, and successful memory corruption transfers execution to attacker-controlled code on the device.

CVSS severity7.3
High
EPSS probability0.19%
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 libsdffextractor on Samsung Mobile Devices before SMR Apr-2024 Release 1 allows local users to execute arbitrary code. The chunk parser writes outside its intended memory buffer while processing chunk data; Samsung has not disclosed the responsible function or faulty calculation. Exploitation requires local access to reach the extractor, and successful memory corruption transfers execution to attacker-controlled code on the device.

The record

CVE
CVE-2024-20849
Published
Apr 2, 2024
Updated
Aug 27, 2024
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Mobile Devices
Classifications
CWE-787
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 2, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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?

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.
Google · Androidversion=12; version=13; version=14

Published CVSS scores

7.3Samsung MobileCVSS:3.1/AV:L/AC:L/PR:N/UI:N/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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