Samsung Exynos Processor Denial-of-Service Vulnerability (CVE-2025-57834)

CVE-2025-57834 is a denial-of-service vulnerability affecting a wide range of Samsung Exynos processors and modems, including the Exynos 980, 850, 990, 1080, 2100, 1280, 2200, 1330, 1380, 1480, 2400, 1580, 2500, 1680, 9110, W920, W930, W1000, Modem 5123, Modem 5300, Modem 5400, and Modem 5410. The vulnerability stems from a lack of proper input validation, allowing a malicious actor to send crafted input that triggers a denial-of-service condition. This could potentially lead to device unresponsiveness, crashes, or other service disruptions. While the specific attack vector is not detailed in the source material, the broad range of affected devices suggests a widespread impact on Samsung products utilizing these components. This vulnerability was published on 2026-04-06.

Attack Chain

1. Attacker identifies a vulnerable Samsung device using an affected Exynos processor or modem.
2. Attacker crafts a malicious input specifically designed to exploit the input validation flaw. The exact nature of this input is unknown without further information from the vendor.
3. Attacker transmits the malicious input to the targeted component of the device. This transmission method is unspecified and could vary based on the specific component and attack vector.
4. The targeted component receives the malicious input without proper validation.
5. The component attempts to process the invalid input, leading to an unexpected error or fault.
6. The error or fault causes the component to malfunction or crash.
7. The malfunction or crash disrupts the normal operation of the device or service.
8. The device enters a denial-of-service state, becoming unresponsive or unusable until restarted or patched.

Impact

Successful exploitation of CVE-2025-57834 can lead to a denial-of-service condition on affected Samsung devices. This could manifest as device crashes, unresponsiveness, or the inability to perform essential functions. The wide range of affected Exynos processors and modems suggests a potentially large number of vulnerable devices. The impact would depend on the criticality of the device or service being affected, ranging from minor inconvenience to significant disruption for users.

Recommendation

• Monitor network traffic and system logs for suspicious activity related to devices with the affected Exynos processors (Exynos 980, 850, 990, 1080, 2100, 1280, 2200, 1330, 1380, 1480, 2400, 1580, 2500, 1680, 9110, W920, W930, W1000, Modem 5123, Modem 5300, Modem 5400, and Modem 5410).
• Deploy the Sigma rule to detect potential denial-of-service attempts targeting the vulnerable devices and tune for your environment.
• Refer to Samsung’s security updates (https://semiconductor.samsung.com/support/quality-support/product-security-updates/) for specific patch information and apply the necessary updates as soon as they become available to remediate CVE-2025-57834.
• Contact US-CERT ( [email protected] ) for incident response assistance and non-NVD related technical cyber security questions.