Description

In vdec, there is a possible out of bounds write due to type confusion. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11383899; Issue ID: MSV-9800.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "6.7",
  "pubDate": "2026-10-05T02:16:53.683Z",
  "pubdate": "2026-10-05T02:16:53.683Z",
  "executiveSummary": "This vulnerability involves a type confusion flaw within the vdec component, facilitating an out-of-bounds write operation.\nThe security defect permits a local escalation of privilege, provided the attacker has already achieved System-level access on the target host.\nThe vulnerability is characterized by a failure in the component's internal object handling, which can be leveraged to corrupt memory and potentially override restricted execution flows.\nNo user interaction is required for successful exploitation, making this a passive threat once the initial privilege threshold is met.\nGiven that the exploit requires prior compromise to a privileged state, the primary risk involves privilege maintenance or lateral movement within the kernel or privileged environment.\nThe issue is tracked under Issue ID MSV-9800, with the associated patch identified as ALPS11383899.",
  "technicalDetails": "The core of the vulnerability resides in the vdec component's handling of data structures, where a type confusion error occurs during object type validation or casting.\nType confusion typically manifests when the system performs operations on an object assuming it is of one type, while the underlying memory contains a different object structure. In this instance, the vdec component misinterprets the memory layout, leading to the incorrect calculation of offsets for read or write operations.\nThe resulting out-of-bounds write occurs because the component utilizes a pointer or index derived from the misidentified object type to write data into memory that lies outside the allocated buffer boundaries.\nFrom an attack flow perspective, an adversary with System privileges interacts with the vdec interface, supplying maliciously crafted input designed to trigger the type confusion error.\nBy manipulating the object state, the attacker influences the logic to miscalculate an target address in kernel or heap memory.\nOnce the logic is confused, the subsequent write operation targets an unintended memory location. An attacker can leverage this arbitrary write capability to overwrite critical data structures, function pointers, or return addresses, thereby redirecting execution flow or elevating privileges to a more pervasive state if the current privilege level is restricted in any specific context.\nBecause the vulnerability is situated within the vdec architecture, it implies that the memory management and validation routines lack sufficient integrity checks to ensure that the object being operated upon matches the expected class or structure definition.\nExploitation does not require network interaction, as the attack surface is exposed locally to processes already operating at elevated privilege levels. The lack of user interaction underscores the silent nature of the exploitation process once the initial prerequisite of System privilege is attained."
}