CVE-2021-25443

Local memory corruption via expired driver pointer

Published Aug 5, 2021 · Updated Aug 3, 2024

Use-after-free in Samsung Mobile Devices on Android 8.1 through 11.0 allows local users to perform unspecified malicious actions. The conn_gadget driver can dereference an object after it has been freed because required validity checks are absent. Samsung has not disclosed the freed object's type, trigger sequence, or a consequence beyond malicious action; local low-privilege access is required.

CVSS severity5.3
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

Use-after-free in Samsung Mobile Devices on Android 8.1 through 11.0 allows local users to perform unspecified malicious actions. The conn_gadget driver can dereference an object after it has been freed because required validity checks are absent. Samsung has not disclosed the freed object's type, trigger sequence, or a consequence beyond malicious action; local low-privilege access is required.

The record

CVE
CVE-2021-25443
Published
Aug 5, 2021
Updated
Aug 3, 2024
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Mobile Devices
Classifications
CWE-825, CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 5, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

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

  1. Affected versionversion=O(8.1), P(9.0), Q(10.0) , R(11.0) <SMR AUG-2021 Release 1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Samsung Electronics Co., Ltd. · Samsung Mobile Devicesversion=O(8.1), P(9.0), Q(10.0) , R(11.0) <SMR AUG-2021 Release 1

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
4.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:P

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-825Expired Pointer Dereference
CWE-416Use After Free

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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