VDB-226900 · CVE-2023-21100 · A-242544249

Google Android 12.0/13.0 inflate.c inflate out-of-bounds write

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.4	$5k-$25k	0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Google Android 12.0/13.0. This vulnerability affects the function inflate of the file inflate.c. Executing a manipulation can lead to out-of-bounds write. This vulnerability is registered as CVE-2023-21100. The attack needs to be launched locally. No exploit is available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability classified as critical was found in Google Android 12.0/13.0 (Smartphone Operating System). This vulnerability affects the function inflate of the file inflate.c. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In inflate of inflate.c, there is a possible out of bounds write due to a heap buffer overflow. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-12 Android-12L Android-13Android ID: A-242544249

The weakness was published 04/20/2023 as A-242544249. The advisory is shared for download at source.android.com. This vulnerability was named CVE-2023-21100 since 11/03/2022. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 09/11/2025). It is expected to see the exploit prices for this product increasing in the near future.

Applying a patch is able to eliminate this problem.

The vulnerability is also documented in the databases at EUVD (EUVD-2023-25268) and CERT Bund (WID-SEC-2023-0841). Once again VulDB remains the best source for vulnerability data.

Affected

Samsung Exynos
Samsung Android

Productinfo

Type

Smartphone Operating System

Vendor

Google

Name

Android

Version

License

free

Website

Vendor: https://www.google.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/03/2022 🔍
04/20/2023 +167 days 🔍
04/20/2023 +0 days 🔍
09/11/2025 +874 days 🔍

Sourcesinfo

Vendor: google.com

Advisory: A-242544249
Status: Confirmed

CVE: CVE-2023-21100 (🔍)
GCVE (CVE): GCVE-0-2023-21100
GCVE (VulDB): GCVE-100-226900
EUVD: 🔍
CERT Bund: WID-SEC-2023-0841 - Samsung Android und Samsung Exynos: Mehrere Schwachstellen

scip Labs: https://www.scip.ch/en/?labs.20150917

Entryinfo

Created: 04/20/2023 07:50
Updated: 09/11/2025 00:03
Changes: 04/20/2023 07:50 (43), 05/14/2023 13:22 (11), 09/04/2025 03:34 (22), 09/11/2025 00:03 (1)
Complete: 🔍
Cache ID: 216::103