---
id: "CVE-2023-42824"
kind: "vulnerability"
aliases: ["CVE-2023-42824"]
title: "The issue was addressed with improved checks"
severity: "high"
cvss: 7.8
epss: null
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Apple iOS and iPadOS", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "apple ipados", "fixed": ["16.7.1"], "affected": "< 16.7.1", "ecosystem": "vendor"}, {"name": "apple ipados", "fixed": ["17.0.3"], "affected": ">= 17.0, < 17.0.3", "ecosystem": "vendor"}, {"name": "apple iphone os", "fixed": ["16.7.1"], "affected": "< 16.7.1", "ecosystem": "vendor"}, {"name": "apple iphone os", "fixed": ["17.0.3"], "affected": ">= 17.0, < 17.0.3", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "infrastructure", "ios", "ipados", "mobile-devices"]
not_affected_if: ["fully-patched-devices"]
published_at: "2023-10-04T19:15:10+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T22:29:04+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-42824", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-42824", "first_seen_at": "2026-10-23T22:29:04+00:00"}]
---

# The issue was addressed with improved checks

Apple iOS and iPadOS contain a kernel flaw that lets a local app or user escalate privileges. An attacker who already has code running on the device can gain kernel-level control.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Apple iOS and iPadOS affected ? fixed ?
- vendor:apple ipados affected < 16.7.1 fixed 16.7.1
- vendor:apple ipados affected >= 17.0, < 17.0.3 fixed 17.0.3
- vendor:apple iphone os affected < 16.7.1 fixed 16.7.1
- vendor:apple iphone os affected >= 17.0, < 17.0.3 fixed 17.0.3

## How to check

Settings > General > About shows the iOS or iPadOS version; compare it against the fixed release in Apple's security notes.

## Fix

Update iOS and iPadOS to a release that includes Apple's fix for CVE-2023-42824; the sources do not name the fixed version.
Follow CISA's instruction to apply the vendor mitigations or stop using the affected product if none exist.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-42824
- 2026-10-23T22:29:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2023-42824

## From the sources

The issue was addressed with improved checks. This issue is fixed in iOS 16.7.1 and iPadOS 16.7.1. A local attacker may be able to elevate their privileges. Apple is aware of a report that this issue may have been actively exploited against versions of iOS before iOS 16.6.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_