CVE-2025-20943

Memory corruption via unvalidated trustlet input

Published Apr 8, 2025 · Updated Apr 8, 2025

An out-of-bounds write in Samsung Mobile Devices' secfr trustlet allows local privileged attackers to directly corrupt memory. The trustlet fails to validate an input boundary before writing, allowing privileged input to reach memory outside the intended buffer. Affected Android 13, 14, and 15 devices run releases before SMR Apr-2025 Release 1; Samsung discloses memory corruption but no specific execution path.

CVSS severity6.4
Medium
EPSS probability0.15%
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 Samsung Mobile Devices' secfr trustlet allows local privileged attackers to directly corrupt memory. The trustlet fails to validate an input boundary before writing, allowing privileged input to reach memory outside the intended buffer. Affected Android 13, 14, and 15 devices run releases before SMR Apr-2025 Release 1; Samsung discloses memory corruption but no specific execution path.

The record

CVE
CVE-2025-20943
Published
Apr 8, 2025
Updated
Apr 8, 2025
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Mobile Devices
Classifications
CWE-787
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Apr 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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

6.4Samsung MobileCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
4.4NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/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
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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