CVE-2026-58995 in Android
Summary
by MITRE • 11/02/2026
In getEntryFileName of ZipFileRO.cpp, there is a possible memory safety issue due to a heap buffer overflow. 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 • 11/02/2026
The vulnerability identified in the getEntryFileName function within ZipFileRO.cpp represents a critical security flaw characterized by a heap-based buffer overflow. This specific type of memory safety issue arises when the application writes data beyond the allocated boundaries of a heap-allocated buffer, typically due to insufficient validation of input lengths or improper handling of zip archive metadata. In the context of ZIP file processing, this often occurs during the parsing of central directory entries where filename lengths are extracted and copied into fixed-size buffers without adequate bounds checking. If an attacker crafts a maliciously constructed ZIP file with oversized entry names or malformed headers, the application may copy more data than the destination buffer can hold, resulting in adjacent heap memory being overwritten. This corruption disrupts the internal state of the memory allocator and potentially overwrites critical control structures such as function pointers or object vtables stored on the heap.
The operational impact of this vulnerability is severe due to its potential for local privilege escalation. Because the flaw allows an attacker to manipulate memory layout and execution flow, it can be leveraged to execute arbitrary code within the context of the vulnerable process. The description indicates that no additional execution privileges are required, meaning a standard user account with limited permissions can exploit this weakness. Furthermore, the absence of a need for user interaction significantly lowers the barrier to exploitation. An attacker does not need to trick a victim into clicking a link or opening a file through social engineering; instead, they could potentially trigger the vulnerability by placing a malicious ZIP archive in a directory that is automatically processed by an application using this library, such as an email client scanning attachments, a backup utility processing archives, or a system service monitoring specific folders.
From a classification perspective, this issue aligns with CWE-120 Buffer Copy without Checking Size of Input (Classic Buffer Overflow) and specifically CWE-787 Out-of-bounds Write on Heap. The ability to escalate privileges locally maps directly to the MITRE ATT&CK technique T1068 Exploitation for Privilege Escalation, where an adversary leverages a software vulnerability to gain higher-level access than originally intended. Additionally, if the exploitation involves manipulating heap metadata or control flow redirections, it may also relate to CWE-416 Use After Free or other memory corruption vulnerabilities that often accompany buffer overflows in complex C++ applications like zip file parsers.
Mitigation strategies must focus on rigorous input validation and secure coding practices within the ZipFileRO.cpp module. Developers should implement strict length checks before copying any filename data into buffers, ensuring that the size of the source string does not exceed the capacity of the destination buffer minus one byte for the null terminator. Utilizing safe string handling functions or standard library containers like std::string with appropriate resizing can prevent manual memory management errors. Additionally, enabling compiler security features such as stack protectors and heap metadata integrity checks (e.g., using AddressSanitizer during development) can help detect these issues early in the software lifecycle. For end-users, applying vendor-provided patches promptly is essential to close this attack vector until a permanent code fix is deployed across all affected systems.