Description

A reachable assertion was addressed with improved input validation. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10. An attacker in a privileged network position may be able to cause a denial-of-service.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "6.5",
  "pubDate": "2026-08-17T22:17:06.420Z",
  "pubdate": "2026-08-17T22:17:06.420Z",
  "executiveSummary": "This vulnerability involves a reachable assertion issue stemming from insufficient input validation within iOS and iPadOS.\nAn attacker positioned on a privileged network can exploit this flaw to induce a denial-of-service condition.\nThe affected systems include iOS and iPadOS versions prior to 18.7.10.\nRisk implications center on system availability, potentially disrupting critical networking functionalities upon successful triggering of the assertion failure.\nThe attacker requires a privileged network position to execute the attack, enabling interception or manipulation of network traffic processed by the vulnerable component.\nNo specific authentication requirements beyond network positioning are explicitly mandated by the descriptive parameters.",
  "technicalDetails": "The root cause of the vulnerability resides in inadequate input validation preceding a reachable assertion within the network processing components of iOS and iPadOS.\nWhen malformed or unexpected network input is supplied by an entity with network access, the validation checks fail to sanitize or reject the data adequately.\nConsequently, the execution flow reaches an assertion statement that evaluates to false under the crafted input conditions.\nUpon hitting the failed assertion, the operating system or affected daemon terminates abnormally as a safety mechanism, manifesting as a denial-of-service.\nThe attack flow requires the adversary to be in a privileged network position, such as operating on the local network segment or performing adversary-in-the-middle positioning, allowing them to inject or modify network packets.\nThe payload behavior involves transmitting specifically crafted network traffic designed to bypass initial checks and trigger the vulnerable assertion path.\nThe affected versions encompass iOS and iPadOS releases prior to 18.7.10.\nPost-exploitation impact is strictly limited to service disruption and application or system crashes, resulting in a denial-of-service state without direct remote code execution capabilities described."
}