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VulnerabilityCVE-2023-20938Published 2023-02-28

CVE-2023-20938 — Android

highPublic exploit4 PoC repos

As of 2024-08-02, CVE-2023-20938 is a HIGH-severity vulnerability in Android, CVSS v3.1 8.1, EPSS 0.3% (25.0th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2023-20938, most recently “Android Exploit Chain — Saito Tech Commercial Spyware: ART Runtime RCE, Binder UAF LPE, Pixel Bootloader Persistence (CVE-2026-22104, CVE-2026-22107, CVE-2026-22112)”.

CVSS v3.1
8.1/10High
EPSS
0.3%Higher than 25.0% of scored CVEs
CISA KEV
NoNot in the KEV catalog
Tracked threats
1Campaigns referencing it
Priority
7.1/10Threadlinqs triage score
Published
Updated 2024-08-02
CVSS v3.1 8.1 (HIGH) · EPSS 0.3% (higher than 25.0% of all scored CVEs) · Priority 7.1/10 · Published 2023-02-28

Last updated:

What is CVE-2023-20938?

In binder_transaction_buffer_release of binder.c, there is a possible use after free due to improper input validation. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-257685302References: Upstream kernel

The record classifies CVE-2023-20938 under weakness class CWE-416. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 1342 days ago.

Severity and exploitation probability

CVSS v3.1 base score
8.1 — HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (FIRST)
0.3% probability of exploitation in the next 30 days, higher than 25.0% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
7.1/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2023-02-28, last modified 2024-08-02

Is CVE-2023-20938 being exploited?

Weaponised exploit code for CVE-2023-20938 is publicly available. 4 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 19 in the Threadlinqs vulnerability feed.

Affected products and versions

  • (vendor unspecified): Android

How to fix CVE-2023-20938

No vendor patch reference has been recorded for CVE-2023-20938 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2023-20938

1 tracked threat in the Threadlinqs corpus references CVE-2023-20938, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on .

Other references