Description

Null pointer dereference issue in the image codec module. Impact: Successful exploitation of this vulnerability may affect availability.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "4.0",
  "pubDate": "2026-08-17T09:17:31.140Z",
  "pubdate": "2026-08-17T09:17:31.140Z",
  "executiveSummary": "A null pointer dereference vulnerability has been identified within the image codec module, posing a direct threat to system availability. Successful exploitation of this security flaw results in application crashes or denial of service conditions affecting the affected systems and products hosting the vulnerable image processing functionality.\nThe vulnerability manifests during the parsing or decoding of maliciously crafted image files handled by the image codec module. An attacker capable of supplying a specially formatted image input can trigger the null pointer dereference, leading to immediate abnormal termination of the parsing process or the host process.\nRisk implications are primarily centered around availability disruption, potentially halting critical rendering or processing pipelines. Attacker capabilities required to leverage this flaw include the ability to deliver a malicious payload to the vulnerable component, such as through user interaction or automated ingestion of untrusted media files.\nBased on the provided input, specific exploitation requirements and authentication or privilege levels are not explicitly detailed, but typical attack vectors involve processing untrusted input streams across network or local boundaries where image parsing occurs.",
  "technicalDetails": "The vulnerability resides in the image codec module, specifically within the internal routines responsible for handling structural elements, metadata, or pixel data during image decoding operations.\nThe root cause of the issue is a null pointer dereference, which occurs when the software attempts to read from or write to a memory address designated by a null pointer. This typically happens when the codec module fails to properly validate return values from memory allocation routines, initialization functions, or parser state transitions when processing malformed or anomalous image structures.\nThe attack flow begins when an untrusted image file is introduced into the image codec module for parsing. As the codec parses the maliciously crafted headers or structural fields, an internal pointer expected to reference a valid memory buffer, context structure, or function table remains uninitialized or is explicitly set to null due to error handling omissions or unexpected input states.\nWhen the execution flow subsequently attempts to dereference this pointer to access parsing parameters or image scanlines, the operating system triggers a segmentation fault or memory access violation, forcing the abrupt termination of the process.\nRegarding network exposure and execution context, the vulnerable component operates wherever image decoding takes place, potentially exposing local applications, web browsers, or server-side rendering engines to untrusted payloads. Authentication requirements and privilege levels depend heavily on the specific application architecture consuming the image codec module, ranging from unauthenticated remote exposure via web upload forms to local privilege contexts.\nThe post-exploitation impact is constrained by the nature of null pointer dereferences in this context, primarily resulting in a denial of service via application crash, interrupting dependent services and rendering pipelines without necessarily achieving arbitrary code execution."
}