Description

In vdec, there is a possible out of bounds write 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. Patch ID: ALPS11262030; Issue ID: MSV-9197.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "8.4",
  "pubDate": "2026-09-07T02:17:18.800Z",
  "pubdate": "2026-09-07T02:17:18.800Z",
  "executiveSummary": "The vulnerability identified in vdec involves a heap-based buffer overflow, classified as an out-of-bounds write flaw.\nThis security defect permits an attacker to perform unauthorized memory operations, potentially leading to local escalation of privilege.\nThe vdec component is susceptible to exploitation without requiring additional execution privileges or user interaction, significantly lowering the barrier for potential malicious actors.\nGiven that this vulnerability resides within a system-level component, successful exploitation allows an attacker to manipulate memory structures, execute arbitrary code, or compromise the integrity of the host operating system.\nThe lack of required authentication or user interaction necessitates immediate remediation to prevent potential privilege escalation attacks from low-privileged local accounts or malicious processes.\nIssue ID: MSV-9197; Patch ID: ALPS11262030.",
  "technicalDetails": "The vulnerability manifests as an out-of-bounds write within the heap memory space of the vdec (Video Decoder) component. This flaw occurs when the component fails to properly validate input sizes or verify boundary constraints before executing write operations into a pre-allocated heap buffer.\nAt the root cause, a lack of strict length checking during the processing of video data streams allows an attacker to supply a crafted payload that exceeds the capacity of the intended destination buffer. When the buffer overflow occurs, it overwrites adjacent memory segments on the heap. Depending on the memory layout and the specific data overwritten, this can lead to the corruption of adjacent heap metadata, such as chunk headers, or overwrite critical data structures, object pointers, or function pointers.\nThe exploitation flow begins with the delivery of a malformed video bitstream or control command processed by the vdec service. Since the service operates with elevated system privileges, the overflow allows for the diversion of control flow. An attacker can leverage this memory corruption to redirect execution to arbitrary code or manipulate object pointers to achieve a primitives-based exploit, such as read/write-what-where.\nBecause the vdec component processes data directly from the input stream, the vulnerability does not require the attacker to possess elevated execution privileges, nor does it necessitate any interaction from a user. An attacker with the ability to trigger a call to the vulnerable vdec functions can achieve controlled memory corruption.\nThe impact of this vulnerability is critical, as it provides a mechanism for local privilege escalation. By overwriting function pointers or sensitive kernel/system state, the attacker can break out of restricted sandboxes or elevate their process context to that of the vdec service. In scenarios where the service runs as a high-privileged system or kernel-level process, this results in full system compromise. Post-exploitation, an attacker may achieve persistent unauthorized access, bypass system security controls, or gain complete control over the device. The absence of network exposure requirements suggests this is primarily a local attack vector, likely exploited by a malicious application installed on the target device or through vectors that interact directly with the video decoding pipeline."
}