https://feed.craftedsignal.io/tags/exynos/Trending threats, MITRE ATT&CK coverage, and detection metadata — refreshed continuously.Hugoenhello@craftedsignal.iohello@craftedsignal.ioMon, 06 Apr 2026 20:16:20 +0000https://feed.craftedsignal.io/briefs/2026-04-exynos-wifi-uaf/Mon, 06 Apr 2026 20:16:20 +0000hello@craftedsignal.iohttps://feed.craftedsignal.io/briefs/2026-04-exynos-wifi-uaf/A use-after-free vulnerability exists in the Wi-Fi driver of Samsung Mobile and Wearable Processors Exynos 980, 850, 1080, 1280, 1330, 1380, 1480, 1580, W920, W930, and W1000 due to improper synchronization on a global variable, allowing attackers to trigger a race condition and potentially execute arbitrary code.CVE-2025-54602 is a use-after-free vulnerability affecting the Wi-Fi driver in Samsung Mobile Processor and Wearable Processor Exynos chipsets. This vulnerability impacts the following Exynos models: 980, 850, 1080, 1280, 1330, 1380, 1480, 1580, W920, W930, and W1000. The root cause is an improper synchronization on a global variable within the driver, leading to a potential use-after-free scenario. An attacker can exploit this vulnerability by triggering a race condition through concurrent invocation of an ioctl function from multiple threads. Successful exploitation can lead to memory corruption, arbitrary code execution, and ultimately, device compromise. This vulnerability poses a significant risk to devices using the affected Exynos chipsets, including smartphones and wearable devices.

Attack Chain

1. Attacker gains initial access to the target device, which could be through a malicious application installed by the user.
2. The malicious application creates multiple threads to concurrently access the Wi-Fi driver.
3. Each thread invokes the vulnerable ioctl function within the Wi-Fi driver.
4. Due to the lack of proper synchronization, a race condition occurs when accessing a global variable.
5. One thread frees the memory associated with the global variable, while another thread continues to access it.
6. The second thread attempts to use the freed memory, resulting in a use-after-free condition.
7. The use-after-free condition leads to memory corruption, potentially allowing the attacker to overwrite critical data structures.
8. The attacker leverages the memory corruption to gain arbitrary code execution within the context of the Wi-Fi driver, potentially leading to full device compromise.

Impact

Successful exploitation of CVE-2025-54602 can lead to a range of severe consequences. An attacker could potentially gain arbitrary code execution on the affected device. Given the wide deployment of Samsung devices using the vulnerable Exynos chipsets, the potential number of victims is significant. Impacted sectors include mobile communications, consumer electronics, and wearable technology. A successful attack could result in data theft, device bricking, or the installation of persistent malware.

Recommendation

• Apply the security updates provided by Samsung that address CVE-2025-54602 on affected Exynos chipsets. Refer to the Samsung security update webpage for specific patch versions (https://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2025-54602/).
• Monitor for unusual process creation originating from applications interacting with Wi-Fi functionalities using the Sigma rule provided below.
• Implement runtime memory protection mechanisms to detect and prevent use-after-free vulnerabilities during the execution of applications and system services.

]]>highadvisorycve-2025-54602use-after-freeexynossamsungwifihttps://feed.craftedsignal.io/briefs/2026-04-exynos-dos/Mon, 06 Apr 2026 20:16:20 +0000hello@craftedsignal.iohttps://feed.craftedsignal.io/briefs/2026-04-exynos-dos/A denial-of-service vulnerability, CVE-2025-57834, exists in Samsung Exynos processors and modems due to improper input validation, potentially leading to device malfunction or service disruption.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.

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