HOMEVULNERABILITIESCVE-2023-21000
HIGH

CVE-2023-21000

CWE-667Published: March 24, 2023· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

In MediaCodec.cpp, there is a possible use after free due to improper locking. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-13Android ID: A-194783918

NVD Source

Technical Analysis

CVE-2023-21000 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Google1 product(s)
android
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

PATCHhttps://source.android.com/security/bulletin/pixel/2023-03-01
PATCHhttps://source.android.com/security/bulletin/pixel/2023-03-01

All References (2)

→
https://source.android.com/security/bulletin/pixel/2023-03-01Patch · Vendor Advisory
→
https://source.android.com/security/bulletin/pixel/2023-03-01Patch · Vendor Advisory

Quick Facts

CVE IDCVE-2023-21000
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-667
CISA KEVNo
Affected1 vendor(s)
PublishedMar 24, 2023

Related CVEs (CWE-667)

CVE-2021-22530
9.9
CVE-2020-12658
9.8
CVE-2019-5886
9.8
CVE-2020-15674
8.8
CVE-2024-58087
8.1
CVE-2020-11284
7.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-21000 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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