CVE-2026-69050 in Exynos 1480
Summary
by MITRE • 11/05/2026
Out-of-bounds memory access in a device driver due to improper resource state tracking.
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Analysis
by VulDB Data Team • 11/05/2026
The vulnerability described constitutes an out-of-bounds (OOB) memory access within the context of a kernel-mode device driver, specifically stemming from inadequate validation and management of internal resource states. In complex operating system architectures, device drivers operate with high privileges and direct hardware interaction capabilities, making their integrity critical to overall system security. When a driver fails to properly track or validate the state of allocated resources such as memory buffers, file handles, or synchronization primitives, it may proceed with operations that assume valid boundaries which no longer exist or were never correctly established. This flaw typically arises during race conditions where concurrent threads modify resource states without proper locking mechanisms, or through logic errors in error handling paths where cleanup routines do not account for partial allocations or previous failures. The core technical deficiency lies in the absence of rigorous boundary checks before memory access operations are executed, allowing an attacker to induce reads from or writes to memory regions outside the intended allocation scope.
From a classification perspective, this vulnerability aligns with CWE-125 Out-of-bounds Read and CWE-787 Out-of-bounds Write depending on whether the malicious input triggers data exfiltration or arbitrary code execution capabilities respectively. These categories highlight the fundamental failure in memory safety principles that modern secure coding standards strive to enforce. The lack of proper resource state tracking implies a deviation from established best practices for defensive programming, where every access point must verify that indices and offsets remain within legally allocated bounds. This oversight creates a predictable attack surface wherein crafted inputs can manipulate internal pointers or array indexes to target sensitive kernel memory structures adjacent to the intended buffer.
The operational impact of such a vulnerability is severe due to its location in privileged code space. An out-of-bounds write allows an attacker with local access to overwrite critical data structures within the kernel, potentially leading to arbitrary code execution with system-level privileges. This effectively bypasses user-space isolation mechanisms and grants full control over the host operating system. Conversely, if the flaw results primarily in an out-of-bounds read, it may facilitate information disclosure by leaking sensitive kernel memory contents such as cryptographic keys, session tokens, or other process data into user space. In either scenario, the stability of the entire system is compromised, often resulting in denial of service through kernel panics or blue screens when corrupted pointers are dereferenced later during normal operation.
In terms of adversary tactics, this vulnerability maps to ATT&CK technique T1055 Process Injection and potentially T1068 Exploitation for Privilege Escalation if leveraged to gain higher privileges from a lower-privileged context. Attackers would likely exploit this flaw by sending specially crafted IOCTL requests or triggering specific hardware events that force the driver into an invalid state, thereby inducing the memory violation at a precise moment where control flow can be hijacked. The exploitation chain typically involves calculating the offset of target kernel structures relative to the vulnerable buffer and using heap spraying techniques if necessary to ensure predictable layout for reliable exploitation.
Mitigation strategies must focus on both immediate patching and long-term architectural improvements. Immediate remediation requires updating the affected device driver with a version that implements strict bounds checking before any memory access operation occurs. Developers should integrate static analysis tools configured to detect potential buffer overflows during the development phase and employ dynamic testing methods such as fuzzing against IOCTL interfaces to uncover edge cases in state management logic. Furthermore, implementing kernel-level protections like Kernel Address Space Layout Randomization (KASLR) can mitigate exploitation success rates by making it difficult for attackers to predict target addresses, although this is not a substitute for fixing the root cause. Long-term solutions involve adopting memory-safe programming languages or frameworks where possible and enforcing rigorous code review processes that specifically examine resource lifecycle management and concurrency handling within driver modules.