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CVE-2023-21052

21
FAUCET Score

CVE-2023-21052 is an out-of-bounds write vulnerability in the Android kernel, specifically within the setToExternal function of ril_external_client.cpp. This flaw, due to a missing bounds check, could allow for local escalation of privilege. The vulnerability has a CVSS score of 6.7 (Medium), indicating a local attack vector with low complexity, requiring high privileges to exploit, but without user interaction. Successful exploitation could lead to high impact on confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, nor are there publicly available exploit modules in common frameworks like Metasploit or Nuclei. Community discussion and media coverage for this CVE are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:google:android:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.7MEDIUM

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
0.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.10%
Probability of exploitation in next 30 days
EPSS Percentile
0.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0009 is in the 11th percentile among its peer group of 3,720 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

googlevendor investigatingvia nvd_reference
View patch

References

source.android.com / security/bulletin/pixel/2023-03-01
Vendor Advisory