CVE-2024-20842

Memory corruption via improperly validated APDU

Published Apr 2, 2024 · Updated Mar 12, 2025

An out-of-bounds write in libsec-ril before SMR Apr-2024 Release 1 allows local privileged attackers to corrupt Samsung Mobile Devices memory. The APDU handler inadequately validates an APDU before performing a write that crosses the intended memory boundary. Reaching the flaw requires high local privileges on an affected device, and Samsung reports memory corruption rather than arbitrary code execution.

CVSS severity4.2
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds write in libsec-ril before SMR Apr-2024 Release 1 allows local privileged attackers to corrupt Samsung Mobile Devices memory. The APDU handler inadequately validates an APDU before performing a write that crosses the intended memory boundary. Reaching the flaw requires high local privileges on an affected device, and Samsung reports memory corruption rather than arbitrary code execution.

The record

CVE
CVE-2024-20842
Published
Apr 2, 2024
Updated
Mar 12, 2025
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Mobile Devices
Classifications
CWE-787
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Apr 2, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 12, 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 privilegesadmin

What is affected?

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

Published CVSS scores

6.7NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
4.2Samsung MobileCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

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
Privilegesadmin
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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