CVE-2018-21084Network attack vector

Memory disclosure via get_kek read-after-free

Published Apr 8, 2020 · Updated Aug 5, 2024

A race condition in get_kek on Samsung mobile devices with Android 5.1, 6.0, and 7.x allows remote attackers to read freed memory. The get_kek routine accesses an object after another execution path frees it because concurrent access is not properly synchronized. Successful exploitation requires winning the timing race; Samsung has not published which memory can be read or any further consequence.

CVSS severity8.1
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A race condition in get_kek on Samsung mobile devices with Android 5.1, 6.0, and 7.x allows remote attackers to read freed memory. The get_kek routine accesses an object after another execution path frees it because concurrent access is not properly synchronized. Successful exploitation requires winning the timing race; Samsung has not published which memory can be read or any further consequence.

The record

CVE
CVE-2018-21084
Published
Apr 8, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416, CWE-362
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 8, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.1NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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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