CVE-2026-55365 in Android
Summary
by MITRE • 09/15/2026
In multiple functions of remap.c, there is a possible out-of-bounds write due to an incorrect bounds check. This could lead to local escalation of privilege 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 identified in the remap.c module represents a critical memory safety flaw characterized by an improper validation of array or buffer boundaries during data manipulation operations. Specifically, the functions within this source file fail to correctly verify that input indices or offsets remain within the allocated limits of the target data structure before performing write operations. This logical error allows for an out-of-bounds write condition, where data is written to memory locations adjacent to the intended buffer. Such a flaw falls squarely under the Common Weakness Enumeration category CWE-787: Out-of-bounds Write, which describes situations where software writes data past the end or before the beginning of the intended buffer. This type of vulnerability is particularly dangerous because it can corrupt critical system structures, overwrite function pointers, or alter control flow variables depending on what memory resides immediately adjacent to the vulnerable buffer in the heap or stack allocation space.
The operational impact of this flaw is severe due to its potential for local privilege escalation. An attacker who gains access to the affected service or application does not require user interaction to exploit this condition, significantly lowering the barrier to entry for malicious actors. By carefully crafting input data that triggers the incorrect bounds check, an adversary can write arbitrary values into sensitive memory regions. If these overwritten locations contain control flow mechanisms such as return addresses on the stack or function pointers in heap metadata, the attacker may achieve remote code execution capabilities within the context of the vulnerable process. Since many system-level services run with elevated privileges, successfully exploiting this out-of-bounds write can result in the compromise of System execution privileges, effectively granting the attacker full control over the underlying operating environment. This aligns with MITRE ATT&CK technique T1068: Exploitation for Privilege Escalation, where attackers leverage software vulnerabilities to gain higher-level access than originally intended.
Mitigation strategies must focus on both immediate remediation and long-term defensive coding practices. The primary corrective action involves modifying the remap.c source code to implement rigorous bounds checking before any write operation is executed against the target buffer. Developers should ensure that all indices are validated against the maximum size of the allocated memory region, rejecting or truncating inputs that exceed these limits. Additionally, integrating static analysis tools and fuzzing frameworks into the software development lifecycle can help identify similar logical errors in other modules before deployment. From a defensive posture perspective, deploying operating system-level mitigations such as Address Space Layout Randomization (ASLR), Data Execution Prevention (DEP), and Stack Canaries is essential to hinder exploitation attempts even if the underlying code flaw persists. These mechanisms make it significantly more difficult for an attacker to predict memory layouts or execute injected shellcode, thereby reducing the likelihood of successful privilege escalation despite the presence of the vulnerability.