Google has published its November 2026 Android Security Bulletin, addressing 208 vulnerabilities, including 23 rated Critical, across the mobile operating system and related hardware components. Among the most serious issues is CVE-2026-58868, a Critical vulnerability that could allow remote code execution without requiring user interaction. The flaw affects Android versions 14 through 17 and is caused by a heap buffer overflow in the onOutputReceived function of FrameDecoder.cpp. According to Google’s security advisory, the issue could result in an out-of-bounds memory write, potentially allowing an attacker to execute code on an affected device. The bulletin identifies the vulnerability as a Framework component issue and states that exploitation does not require additional execution privileges. Google also clarified that its Critical severity assessment assumes platform and service security protections have been disabled for development purposes or successfully bypassed. As of the bulletin’s publication, Google had not reported known exploitation of the listed vulnerabilities. The CVE entry also does not provide details explaining how an attacker could reach the affected code, leaving the precise attack route unclear.
Google’s November security updates use two patch levels to help device manufacturers distribute fixes across different Android components. Devices receiving the 2026-11-01 security patch level are covered for vulnerabilities listed under the Framework, System and other components addressed at that level. The 2026-11-05 patch level includes additional fixes for kernel components and vulnerabilities affecting hardware technologies supplied by companies including Arm, Imagination Technologies, MediaTek, Unisoc and Qualcomm. Google recommends that users install the latest security updates made available by their device manufacturers and mobile carriers, as distribution schedules vary between models and regions. Users can check their device’s patch information by opening Settings, selecting About phone or About tablet, and viewing the Android version section. The Android security update date indicates the installed security patch level, while the Google Play system update date identifies a separate update channel. Google Play system updates can deliver certain security fixes to devices running Android 10 and later, but CVE-2026-58868 is not included in the November bulletin’s listed Google Play system update entries. Users should therefore check the Android security update date when verifying protection against this particular vulnerability. The bulletin does not provide a specific workaround for devices that have not yet received the relevant patch.
Another Critical issue listed in the November bulletin is CVE-2026-58882, a remote denial-of-service vulnerability associated with Android’s handling of WAP Push messages delivered through SMS. Its CVE record and the research published by a security researcher known as Mark B describe a flaw involving the decodeWapPdu function. A specially crafted message could reportedly cause the Android phone service process to crash without requiring the recipient to open or interact with the message. The resulting disruption could terminate active calls, including emergency calls, and affect cellular connectivity. The researcher published a technical write-up titled “SMS of Death” on October 29, describing the behaviour and demonstrating the issue on tested devices. However, neither Google’s bulletin nor the available vulnerability documentation confirms that the CVE and the researcher’s described issue are exactly the same bug. The November bulletin lists CVE-2026-58882 as a Critical denial-of-service vulnerability affecting Android 14 through 17. Android 12 and 13 are not included in the affected-version list for this entry, although that does not independently establish their overall security status. The researcher has also made a proof-of-concept demonstration publicly available, making timely security updates particularly important for users with supported devices.
Beyond these two vulnerabilities, Google’s November bulletin includes additional Critical issues that could affect Android devices through remote code execution, privilege escalation and denial-of-service conditions. CVE-2026-58876 and CVE-2026-58936 are listed as Critical remote code execution vulnerabilities in the System component. Other Critical entries affect the Android kernel, including issues involving Bluetooth, pKVM and human interface device components. The bulletin also identifies serious vulnerabilities in modem-related components supplied by MediaTek and a closed-source component from Qualcomm. MediaTek’s November security advisory separately describes its Critical modem vulnerabilities, including out-of-bounds write issues, and states that it is not aware of active exploitation. Google’s bulletin divides the fixes into the November 1 and November 5 patch levels so manufacturers can deliver common Android security updates while incorporating additional hardware-specific fixes. The company encourages device makers to include all available fixes in their updates. Since manufacturers and carriers determine when updates reach individual devices, users may receive the patches at different times. Installing available updates and checking the security patch level remain the primary steps for reducing exposure to the vulnerabilities covered in the November release.
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