In binder_transaction_buffer_release of binder.c, there is a possible use after free due to improper input validation.

published 2023-02-28 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-25106

cvss: 8.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 27%
public exploits: 0; none known

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

Patch / fix

fixed in 1 distros 2 links 1

google android 2023-02-01

debian ubuntu

linux Debian 14, Debian 13, Debian 12 5.17.6-1

debian advisories DEBIAN-CVE-2023-20938

linux Ubuntu 20.04 LTS 5.4.0-144.161
linux Ubuntu 22.04 LTS 5.15.0-72.79
linux-aws Ubuntu 20.04 LTS 5.4.0-1097.105
linux-aws Ubuntu 22.04 LTS 5.15.0-1036.40
linux-gcp Ubuntu 20.04 LTS 5.4.0-1101.110
linux-gcp Ubuntu 22.04 LTS 5.15.0-1034.42
linux-gke Ubuntu 20.04 LTS 5.4.0-1095.102
linux-gke Ubuntu 22.04 LTS 5.15.0-1033.38

ubuntu advisories UBUNTU-CVE-2023-20938

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

source.android.com/security/bulletin/2023-02-01 advisory

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-06-15)

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	8.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	8.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

n/a Android
google android

Classification

Weakness

CWE-416 Use After Free

References

source.android.com /security/bulletin/2023-02-01
patch, vendor-advisory

Sources

CVE List CVE-2023-20938
NVD CVE-2023-20938

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary