CVE-2021-25369Known exploitationPublic exploit

Kernel-address disclosure via permissive sec_log copy

Published Mar 26, 2021 · Updated Oct 21, 2025

Information disclosure in Samsung Mobile Devices before SMR Mar-2021 Release 1 allows local users to read sensitive kernel addresses. Samsung's dumpstate copies a Mali WARN_ON backtrace from /proc/sec_log into the more permissive /data/log/sec_log.log, exposing task_struct and sys_call_table addresses. An application on an affected Exynos device must trigger the Mali ioctl warning and start bugreport; the leaked addresses defeat KASLR and support further kernel compromise.

CVSS severity6.2
Medium
EPSS probability1.12%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Samsung Mobile Devices before SMR Mar-2021 Release 1 allows local users to read sensitive kernel addresses. Samsung's dumpstate copies a Mali WARN_ON backtrace from /proc/sec_log into the more permissive /data/log/sec_log.log, exposing task_struct and sys_call_table addresses. An application on an affected Exynos device must trigger the Mali ioctl warning and start bugreport; the leaked addresses defeat KASLR and support further kernel compromise.

The record

CVE
CVE-2021-25369
Published
Mar 26, 2021
Updated
Oct 21, 2025
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Mobile Devices
Classifications
CWE-200, T1005
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 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=O(8.x), P(9.0), Q(10.0) <SMR Mar-2021 Release 1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Samsung Electronics Co., Ltd. · Samsung Mobile Devicesversion=O(8.x), P(9.0), Q(10.0) <SMR Mar-2021 Release 1

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
6.2Samsung MobileCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N

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 exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1005Data from Local System

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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