CVE-2022-39126 is a medium-severity vulnerability identified in several Unisoc (Shanghai) Technologies Co., Ltd. chipsets, including SC9863A, SC9832E, SC7731E, and multiple T-series models such as T610, T310, T606, T760, T618, T612, T616, T770, T820, and S8000. These chipsets are commonly integrated into Android devices running Android 10, 11, and 12. The vulnerability arises from a missing bounds check in the sensor driver, which leads to an out-of-bounds write condition. This flaw can cause uncontrolled resource consumption, specifically resulting in a local denial of service (DoS) at the kernel level. The CVSS v3.1 base score is 5.5, reflecting a medium severity level. The attack vector is local (AV:L), requiring low attack complexity (AC:L) and low privileges (PR:L), but no user interaction (UI:N). The impact is limited to availability (A:H), with no confidentiality or integrity impact. No known exploits are reported in the wild, and no patches have been linked yet. The vulnerability is categorized under CWE-400, which relates to uncontrolled resource consumption, indicating that exploitation could exhaust system resources, causing kernel instability or crashes. Since the flaw is in the sensor driver, exploitation likely requires local access to the device, such as through a malicious app or compromised user environment. The lack of user interaction requirement means that once local access is obtained, exploitation can be automated or triggered without further user action.

For European organizations, the impact of CVE-2022-39126 primarily concerns devices using affected Unisoc chipsets running Android 10 to 12. These chipsets are often found in budget or mid-range smartphones and IoT devices. A successful exploitation could cause kernel crashes leading to device unavailability, disrupting business operations reliant on mobile or embedded devices. While the vulnerability does not compromise data confidentiality or integrity, the denial of service could interrupt critical communications, mobile workforce productivity, or IoT device functionality. This is particularly relevant for sectors such as telecommunications, logistics, and manufacturing, where mobile or embedded devices are integral. Additionally, since the vulnerability requires local access, the risk increases if devices are exposed to untrusted users or if malicious apps are installed. The absence of known exploits reduces immediate risk, but the medium severity and ease of exploitation with low privileges warrant proactive mitigation to prevent potential targeted attacks or malware leveraging this flaw to cause service disruptions.

To mitigate CVE-2022-39126, European organizations should: 1) Identify and inventory devices using the affected Unisoc chipsets and running Android 10, 11, or 12. 2) Monitor vendor and security advisories for official patches or firmware updates from device manufacturers or Unisoc. 3) Restrict installation of untrusted or third-party applications on devices to reduce risk of local exploitation. 4) Employ mobile device management (MDM) solutions to enforce security policies, including app whitelisting and privilege restrictions. 5) Limit physical and logical access to devices, especially in sensitive environments, to prevent unauthorized local access. 6) Conduct regular security assessments and penetration tests focusing on mobile and embedded device security. 7) Educate users on risks of installing unverified apps and maintaining device security hygiene. 8) If possible, consider upgrading devices to newer hardware or software versions not affected by this vulnerability. These steps go beyond generic advice by focusing on device-specific inventory, access control, and proactive monitoring tailored to the affected chipsets and Android versions.