CVE-2026-33964 in Exynos
Summary
by MITRE • 09/14/2026
An issue was discovered in camera in Samsung Mobile Processor Exynos 1580 and 2500. An untrusted pointer dereference occurs when a malformed message is sent to the camera driver, causing limited information disclosure or denial of service.
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Analysis
by VulDB Data Team • 09/14/2026
The vulnerability identified within the camera subsystem of Samsung's Exynos 1580 and Exynos 2500 mobile processors represents a critical flaw in memory management logic during input validation procedures. This issue is classified as an untrusted pointer dereference, which fundamentally indicates that the kernel or driver code fails to adequately verify the validity of pointers received from user-space applications before attempting to access the memory addresses they reference. In modern operating systems such as Android, camera drivers operate with high privileges and interact directly with hardware resources. When a malformed message is sent to this driver, it typically involves crafted data structures that contain invalid or maliciously constructed pointer values rather than legitimate memory references intended for buffer operations or control commands.
The technical mechanism of the flaw relies on the absence of rigorous bounds checking and type validation within the camera driver's input handling routines. Normally, when a user-space application requests access to camera hardware or processes image data, it passes structured messages containing pointers to buffers allocated in kernel space or shared memory regions. The vulnerability arises because the Exynos camera driver does not sufficiently validate whether these pointers point to accessible and properly aligned memory locations within the expected context. Consequently, if an attacker can inject a malformed message with arbitrary pointer values, the system attempts to dereference this untrusted address. This action bypasses standard security boundaries that are designed to isolate user applications from sensitive kernel data structures.
The operational impact of exploiting this vulnerability is twofold, encompassing both information disclosure and denial of service conditions. In scenarios where memory access permissions allow for reading operations, the attacker may achieve limited information disclosure by causing the system to read contents from arbitrary kernel memory locations. This could potentially leak sensitive data such as cryptographic keys, authentication tokens, or other process-specific information residing in adjacent memory pages. Alternatively, if the dereferenced pointer points to an unmapped page or a protected region of memory, the operating system will trigger a fault exception, leading to a crash of the camera service or even a full device reboot. This results in a denial of service that disrupts critical functionality and degrades user experience on affected mobile devices.
From a classification perspective, this vulnerability aligns with Common Weakness Enumeration (CWE) ID 416, which describes Use After Free scenarios involving invalid pointer dereferences due to improper validation or lack thereof. It also relates closely to CWE-94, Improper Control of Generation of Code, if the malformed message allows for code injection through crafted pointers pointing to executable memory regions, although the primary description emphasizes data access and stability issues. In terms of adversary tactics, this flaw facilitates techniques associated with MITRE ATT&CK ID T1055, Process Injection, or more specifically T1297, Buffer Corruption, as it involves manipulating internal structures through malformed inputs. It also supports privilege escalation paths by allowing an unprivileged application to interact dangerously with kernel-level components.
Mitigation strategies for this vulnerability require a multi-layered approach focusing on both immediate patching and long-term architectural improvements. The primary remediation is the deployment of vendor-supplied security patches that update the camera driver code in the Exynos 1580 and 2500 chipsets to include rigorous validation checks before any pointer dereference occurs. Developers must implement strict boundary checking, ensure proper alignment verification for all user-provided buffers, and utilize kernel hardening features such as Kernel Address Space Layout Randomization (KASLR) and Control Flow Integrity (CFI) to mitigate the impact of successful exploitation. Furthermore, enforcing stricter sandboxing policies for camera applications can limit the blast radius if a vulnerability is present. For system integrators, it is crucial to ensure that device firmware updates are promptly applied to end-users to close this gap in memory safety protections against untrusted input attacks.