External risk intelligence

Samsung Exynos GPU Use-After-Free Vulnerability Allows Privilege Escalation

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2025-52910

The vulnerability affects GPU components within mobile and wearable processors. These are local hardware-level components integrated into consumer devices (phones/wearables), not internet-facing services, gateways, or web applications. Public network exposure is not a standard deployment pattern for mobile device GPU firmware.

Use After Free

Samsung Exynos 1280 Firmware

Halo Surface Signal: 1 out of 5 — much less likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

An issue has been identified in the graphics processing unit (GPU) within certain Samsung mobile and wearable processors. This vulnerability could allow for an escalation of privileges, meaning unauthorized access to higher levels of control within the affected systems. The primary concern is to determine if these processors are in use within our environment and to what extent they might be exposed.

A flaw allows unauthorized privilege escalation.
Leadership should remember critical component risks.
Confirm relevance and exposure for affected devices.

Attack Path

How an attacker could exploit the issue

An attacker could reach the vulnerable GPU component in Samsung Exynos processors through the network. This vulnerability, a Use-After-Free flaw, could lead to privilege escalation.

No access or privileges needed.
Triggered by interacting with the GPU.
Potential for unauthorized system control.

Live Threat

Current exploitation, exposure, and threat context

A use-after-free vulnerability in the GPU of certain Samsung Exynos processors could allow an attacker to escalate privileges. This means an unauthorized party could potentially gain higher levels of control over the affected device's system, impacting its overall security and stability. The vulnerability is network-exploitable and does not require user interaction.

System control and access.
Exploited remotely over the network.
Privilege escalation and unauthorized access.

Operational Fix

Recommended remediation, mitigation, and detection steps

Real-world ownership for this critical vulnerability likely falls to mobile device manufacturers and the teams responsible for managing their firmware, given the affected components are Samsung Exynos processors used in mobile and wearable devices. The immediate first step is to identify which specific devices and deployments contain these vulnerable Exynos variants, assess their exposure, and then coordinate with Samsung for firmware updates or patches.

Ownership: Device manufacturers and firmware teams.
Verify first: Device inventory and network reachability.
Action: Coordinate vendor patching and deployment.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is the Samsung Exynos processor line?

Exynos processors are systems-on-chip developed by Samsung, powering a wide range of mobile phones and wearable devices. They include specialized hardware components, such as the Graphics Processing Unit (GPU), which manages visual rendering and computational tasks. CVE-2025-52910 specifically affects the GPU firmware within several Exynos models, including the 1280, 1330, 1380, 1480, 2200, and 2400 series.

How does this Use-After-Free flaw work?

A Use-After-Free (CWE-416) occurs when a program continues to use a memory address after that memory has been cleared or released. In this GPU vulnerability, an attacker can manipulate this stale memory state to corrupt system operations. This specific weakness is dangerous because it can allow an unauthorized user to gain elevated system privileges, essentially bypassing standard security boundaries within the device.

Can any interaction trigger CVE-2025-52910?

The vulnerability involves the GPU firmware and does not require the attacker to have pre-existing privileges or user assistance to initiate an attempt. While the flaw is tied to interacting with the GPU, simply browsing the web or using standard device features under normal conditions is not the same as the intentional, malicious sequences required to trigger the memory corruption.

Is my device at risk based on Halo Surface Signal?

According to Halo Surface Signal, this risk is categorized as 'Very unlikely.' While the CVSS vector identifies the attack vector as network-based, these GPU components are internal hardware elements within consumer mobile and wearable devices. They are not designed as internet-facing services or web applications, making direct, remote network exploitation of the GPU highly irregular for typical device deployments.

What should I do if I manage Exynos-based devices?

Your first step is to conduct an inventory to identify if any devices in your environment utilize the affected Exynos processor models. Once identified, confirm which devices are deployed and reachable. Since these are hardware-level components, you should prioritize monitoring official communication channels from Samsung to obtain and deploy the necessary firmware updates as they become available.

References

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.