CVE-2026-58823 in Android
Summary
by MITRE • 09/09/2026
In stpropnci_process_std of stpropnci_std.cc, there is a possible memory safety issue due to a missing bounds check. 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 identified in the function stpropnci_process_std within the source file stpropnci_std.cc represents a critical memory safety defect characterized by an absence of bounds checking during array or buffer access operations. This flaw allows an attacker to read from or write beyond the allocated boundaries of a data structure, leading to undefined behavior that can be leveraged for malicious purposes. The core technical issue stems from insufficient validation of input indices or lengths before they are used as offsets into memory regions. When such unchecked values are processed, the application may access memory locations outside its intended scope, potentially overwriting adjacent variables, corrupting heap metadata, or executing arbitrary code depending on the specific memory layout and runtime environment.
From a security classification perspective, this vulnerability aligns with CWE-125 Out-of-bounds Read if the flaw allows unauthorized data disclosure, or more critically CWE-787 Out-of-bounds Write if it permits modification of memory contents beyond allocated limits. These categories highlight the fundamental failure in input validation and boundary verification that is essential for secure software development practices. The lack of proper sanitization of user-supplied or internally generated indices creates a direct path to memory corruption, which is one of the most prevalent classes of vulnerabilities in systems programming languages like C and C++.
The operational impact of this flaw is severe due to its potential for local privilege escalation. Since exploitation does not require additional execution privileges beyond those already held by the compromised process or user context, an attacker with low-level access can exploit this weakness to gain higher system rights. The fact that no user interaction is needed further amplifies the risk, as automated scripts or background processes could trigger the vulnerability without any manual intervention from a legitimate user. This characteristic makes it particularly dangerous in multi-user environments or services running with elevated privileges where such an escalation would provide full control over the affected system.
In terms of adversary tactics, this type of exploitation maps to MITRE ATT&CK techniques related to privilege escalation and defense evasion. Specifically, it facilitates lateral movement within a network if the compromised host is used as a pivot point after gaining administrative access. Attackers can leverage memory corruption bugs like this one to bypass security controls that rely on user-level restrictions, effectively neutralizing perimeter defenses by operating from inside with elevated permissions. The absence of required interaction means the vulnerability can be triggered remotely in some contexts or via automated local triggers, increasing its exploitability score significantly compared to vulnerabilities requiring complex social engineering steps.
Mitigation strategies must focus on implementing rigorous input validation and bounds checking mechanisms within the stpropnci_process_std function. Developers should ensure that all indices used for array access are validated against the maximum allowable size of the target buffer before any read or write operation occurs. Utilizing safe programming practices such as using standard library containers with built-in range checks, employing static analysis tools to detect out-of-bounds accesses during development, and applying compiler flags like stack protectors can help prevent exploitation attempts. Additionally, adopting memory-safe languages for new components or refactoring critical legacy code segments is a long-term solution to eliminate entire classes of such vulnerabilities. Regular security audits and penetration testing should also be conducted to identify similar patterns across the codebase that may pose comparable risks.