Samsung kernel pointer leak

CVE-2023-21492 technical analysis

CVE-2023-21492 is a medium-severity Android vulnerability tracked as InfoLeak. The published record describes samsung kernel pointer leak affecting Samsung ≤13. In practical terms, the vulnerability should be evaluated as a specific weakness in a specific component—not as automatic evidence that every affected device can be fully compromised. The execution context, reachable interface, platform mitigations, and availability of a reliable exploit chain all shape real-world risk.

Information-disclosure vulnerabilities expose data or internal state across a boundary that should remain isolated. The disclosed material may be sensitive by itself or may weaken exploit mitigations when combined with another flaw. For CVE-2023-21492, the confirmed impact recorded is: KASLR bypass. Pre-condition for kernel exploitation.

This record lists 2023-05-09 as the public disclosure or patch date, identifies 2023-01-17 as the discovery information currently available, and credits Samsung Mobile. The remediation recorded for affected users is May 2023 SMR. Use the references at the end of this page as the authoritative source, because vendors can revise advisories after publication.

Attack surface and exploitation prerequisites

Determine what access the initiating application, website, peripheral, or local user needs and exactly what information can cross the boundary. A kernel-state leak, user-data disclosure, and application metadata leak have materially different consequences.

A defensible assessment separates reachability, exploitation, and post-exploitation, so a component-level flaw is not described as an end-to-end device takeover. Compensating controls—network segmentation, application allow-listing, restricted messaging or browsing features, and MDM-enforced patching—can reduce exposure, but the durable resolution remains the vendor update identified in this record.

Detection and forensic triage

Prioritize logs from the affected component and from applications that accessed it. Examine abnormal permission use, repeated malformed requests, crashes near sensitive operations, and any subsequent attempt to use the disclosed information in a broader chain.

Absence of a visible symptom does not prove absence of exploitation, and a crash alone does not prove compromise. Preserve device state, record the operating-system build and patch level, and acquire logs using a method appropriate to the legal context—resetting or repeatedly testing the device can destroy useful traces. When assessing a suspected targeted attack, correlate device evidence with account sign-ins, messaging metadata, network telemetry, and MDM events to separate attempted delivery from successful exploitation.

How to mitigate CVE-2023-21492

The primary mitigation is straightforward: Apply Samsung May 2023 SMR patch.

On Android, record both the Android version and the security patch level because the operating-system number alone does not prove that a fix is present. OEM and chipset bulletins may ship on different schedules. Google Play system updates can repair selected modular components, while firmware, kernel, and modem fixes usually depend on the device manufacturer.

1. Identify the exact device model, operating-system build, and current security patch level.
2. Compare that information with the affected range and fixed release documented by the vendor.
3. Back up necessary evidence before making changes when compromise is suspected.
4. Install the latest supported security release rather than stopping at the first version that mentions the CVE.
5. Verify the installed build after reboot and review related accounts and applications for follow-on activity.

PoC interpretation and research notes

This page distinguishes public disclosure from independent reproduction. Its current status is Publicly disclosed. The record is based on the cited public disclosure and has not been represented as proprietary discovery. Any PoC shown above should be reviewed in an isolated lab and used only on systems the researcher owns or is explicitly authorized to test. Public availability is not a guarantee that code is safe, complete, or accurately attributed.

Frequently asked questions about CVE-2023-21492

What is CVE-2023-21492?

CVE-2023-21492 is a Android InfoLeak vulnerability associated with samsung kernel pointer leak. It affects Samsung ≤13, according to the currently cited disclosures. The practical risk depends on the vulnerable component, required access, available mitigations, and whether the device has received May 2023 SMR.

Is CVE-2023-21492 being exploited in the wild?

The status on this page is “Publicly disclosed.” A vendor-confirmed vulnerability is not necessarily known to be actively exploited. This database uses “Exploited in the wild” only when a cited vendor or authoritative security source reports observed exploitation; public PoC availability is tracked separately.

How do I protect a device from CVE-2023-21492?

Install the latest supported security update and verify the resulting build or patch level. The recorded minimum resolution is May 2023 SMR. Apply relevant compensating controls while updates are pending, but do not treat configuration changes as equivalent to patching the underlying vulnerability.