---
id: "CVE-2021-25369"
kind: "vulnerability"
aliases: ["CVE-2021-25369"]
title: "samsung android: An improper access control vulnerability in sec_log file prior to SMR MAR-2021 Release 1 exposes sensitive kernel\u2026"
severity: "medium"
cvss: 6.2
epss: null
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Samsung Mobile Devices", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "samsung android", "fixed": [], "affected": "= 8.0", "ecosystem": "vendor"}, {"name": "samsung android", "fixed": [], "affected": "= 8.1", "ecosystem": "vendor"}, {"name": "samsung android", "fixed": [], "affected": "= 9.0", "ecosystem": "vendor"}, {"name": "samsung android", "fixed": [], "affected": "= 10.0", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["android", "exploited", "infrastructure", "mobile-devices", "samsung"]
not_affected_if: ["unpatched-devices-only"]
published_at: "2021-03-26T19:15:12+00:00"
first_seen_at: "2026-10-23T19:11:52+00:00"
updated_at: "2026-10-23T22:29:04+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-25369", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-25369", "first_seen_at": "2026-10-23T22:29:04+00:00"}]
---

# samsung android: An improper access control vulnerability in sec_log file prior to SMR MAR-2021 Release 1 exposes sensitive kernel…

Samsung mobile devices using the Mali GPU driver expose kernel information to userspace through an improper access control flaw in the sec_log file. An attacker with a local foothold gets sensitive kernel data, and the flaw was chained with CVE-2021-25337 and CVE-2021-25370 in exploits.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Samsung Mobile Devices affected ? fixed ?
- vendor:samsung android affected = 8.0 fixed ?
- vendor:samsung android affected = 8.1 fixed ?
- vendor:samsung android affected = 9.0 fixed ?
- vendor:samsung android affected = 10.0 fixed ?

## Fix

Apply the Samsung security update for your device per vendor instructions, as CISA requires.

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-25369
- 2026-10-23T22:29:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2021-25369

## From the sources

Samsung mobile devices using Mali GPU contains an improper access control vulnerability in sec_log file. Exploitation of the vulnerability exposes sensitive kernel information to the userspace. This vulnerability was chained with CVE-2021-25337 and CVE-2021-25370.

CISA required action: Apply updates per vendor instructions.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_