CVE-2026-58721 in Android
Summary
by MITRE • 09/15/2026
In multiple locations, there is a possible information disclosure due to uninitialized memory use. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.
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Analysis
by VulDB Data Team • 09/15/2026
The vulnerability described constitutes an uncontrolled resource consumption issue stemming from the utilization of uninitialized memory within the affected software component. In systems programming, particularly in languages like C or C++, variables that are declared but not explicitly assigned a value prior to being read will contain whatever data previously resided at that specific location in the computer's random access memory. This phenomenon is commonly categorized under CWE-457, which defines an uninitialised variable use vulnerability. When software fails to properly initialize these memory locations before accessing them for logical operations or output generation, it inadvertently exposes residual data from previous processes or system states. This behavior creates a direct pathway for local information disclosure, allowing an attacker to retrieve sensitive internal state information that was not intended for public consumption.
From an operational perspective, the exploitation of this flaw requires the adversary to possess System execution privileges. This high level of access implies that the vulnerability is likely located within a core system service or a privileged application rather than a user-facing web interface. Consequently, while the attack vector does not require any form of social engineering or direct user interaction such as clicking a link or opening a file, it necessitates that an attacker has already achieved significant control over the target environment. This could occur if malware with high privileges executes on the system, or if a compromised service account is leveraged to trigger the vulnerable code path. The absence of required user interaction makes this vulnerability particularly dangerous in automated attack scenarios where persistent access has been established but further privilege escalation or data exfiltration is needed.
The impact of successfully exploiting this uninitialized memory use extends beyond simple curiosity-driven information gathering. By analyzing the leaked memory contents, an attacker can potentially reconstruct cryptographic keys, session tokens, passwords, or other sensitive configuration details stored in adjacent memory blocks. This intelligence can serve as a stepping stone for more severe attacks, including privilege escalation to kernel-level access or lateral movement within a network if credentials are exposed. The lack of user interaction means that once the system is compromised at the required privilege level, the vulnerability can be triggered repeatedly and automatically without alerting end-users through suspicious UI behavior, thereby increasing the window of opportunity for stealthy data exfiltration.
Mitigation strategies must focus on rigorous code hygiene and defensive programming practices to eliminate uninitialized variable usage entirely. Developers should ensure that all variables are explicitly initialized at the point of declaration or immediately before their first use. Static analysis tools integrated into the continuous integration pipeline can help detect these patterns early in the development lifecycle by flagging paths where variables might be read without prior assignment. Additionally, employing memory sanitizers such as AddressSanitizer during testing phases can actively identify and report uninitialized reads at runtime. For deployed systems, ensuring that all software components are updated to versions provided by the vendor is critical, as these updates typically include patches that enforce proper initialization routines or add bounds checking to prevent access to stale memory regions.