CVE-2026-58941 in Android
Summary
by MITRE • 09/09/2026
In multiple functions of iommu.c, there is a possible out of bounds read/write due to improper input validation. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
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Analysis
by VulDB Data Team • 09/09/2026
The vulnerability described resides within the IOMMU subsystem driver code, specifically in multiple functions located in iommu.c. The core technical flaw stems from improper input validation mechanisms that fail to adequately sanitize or verify user-supplied data before it is utilized as an index or offset for memory access operations. In systems utilizing Input-Output Memory Management Units (IOMMUs), the driver acts as a critical intermediary between peripheral devices and system memory, managing address translation and protection domains. When input validation is insufficient, malicious actors can supply crafted values that exceed expected bounds, leading to out-of-bounds read or write conditions. This type of flaw allows an attacker to access memory regions outside the intended scope of the operation, potentially revealing sensitive kernel data through reads or corrupting critical system structures via writes.
From a security impact perspective, this vulnerability facilitates local privilege escalation with significant severity implications. Because the exploitation does not require additional execution privileges beyond those already held by the compromised user account, and no user interaction is necessary to trigger the flaw, the attack surface is considerably broadened. An unprivileged local attacker can exploit these improper validations to execute arbitrary code within the kernel context or manipulate system state in ways that bypass standard access controls. This effectively allows a low-privilege process to gain root-level permissions, compromising the integrity and confidentiality of the entire operating system environment. The absence of user interaction means that automated exploitation tools could potentially leverage this flaw without any manual intervention from an end-user, increasing the risk of widespread compromise in multi-tenant or shared computing environments.
The technical classification of this issue aligns with CWE-125, which denotes Out-of-bounds Read, and CWE-787, which covers Out-of-bounds Write. These categories highlight the fundamental failure to enforce boundary checks on memory access operations based on external inputs. Furthermore, in the context of the MITRE ATT&CK framework, this vulnerability supports techniques associated with Privilege Escalation via Kernel Exploitation (T1068). The lack of input validation represents a common weakness where developers assume that incoming data will always fall within acceptable ranges, failing to implement rigorous defensive programming practices such as explicit range checking or bounds verification before array indexing or pointer arithmetic.
Mitigation strategies for this vulnerability must focus on strengthening the input validation logic within the affected iommu.c functions. Developers should implement strict boundary checks to ensure that all indices and offsets derived from user inputs are validated against known maximum limits before being used in memory access operations. Additionally, adopting static analysis tools during the software development lifecycle can help identify such logical errors early. For system administrators unable to immediately apply a patch, restricting physical access to devices managed by the IOMMU or disabling unnecessary device passthrough features may reduce the attack surface. However, the definitive resolution requires updating the kernel driver with code that enforces robust input sanitization and error handling for out-of-bounds conditions, ensuring that invalid inputs result in safe failure modes rather than memory corruption.