CVE-2026-84519: Mounting a disk image with maliciously crafted files may lead to unexpected system termination in Apple iOS and iPadOS
CVE-2026-84519 is an out-of-bounds write vulnerability in Apple iOS and iPadOS that occurs when mounting a disk image containing maliciously crafted files. This flaw may cause unexpected system termination (crashes). The issue was addressed by improved bounds checking and fixed in iOS 26.7, iPadOS 26.7, iOS 27, iPadOS 27, and certain macOS versions. Users running affected versions prior to these fixes are vulnerable to this issue.
AI Analysis
Technical Summary
This vulnerability involves an out-of-bounds write triggered by mounting a disk image with maliciously crafted files on Apple iOS and iPadOS devices. The improper bounds checking could lead to unexpected system termination, potentially causing denial of service. Apple fixed this issue by improving bounds checking in iOS 26.7, iPadOS 26.7, iOS 27, iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7.
Potential Impact
An attacker who can supply a malicious disk image may cause the affected device to crash unexpectedly, resulting in denial of service. There is no indication from the data that this vulnerability leads to code execution or data compromise. No known exploits in the wild have been reported.
Mitigation Recommendations
Apply the official fixes by upgrading to iOS 26.7 or later, iPadOS 26.7 or later, or the corresponding fixed macOS versions. These updates contain improved bounds checking that resolves the out-of-bounds write issue. Users running earlier versions should update promptly to mitigate this vulnerability.
CVE-2026-84519: Mounting a disk image with maliciously crafted files may lead to unexpected system termination in Apple iOS and iPadOS
Description
CVE-2026-84519 is an out-of-bounds write vulnerability in Apple iOS and iPadOS that occurs when mounting a disk image containing maliciously crafted files. This flaw may cause unexpected system termination (crashes). The issue was addressed by improved bounds checking and fixed in iOS 26.7, iPadOS 26.7, iOS 27, iPadOS 27, and certain macOS versions. Users running affected versions prior to these fixes are vulnerable to this issue.
Affected software
Apple
iOS and iPadOS
Apple
macOS
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds write triggered by mounting a disk image with maliciously crafted files on Apple iOS and iPadOS devices. The improper bounds checking could lead to unexpected system termination, potentially causing denial of service. Apple fixed this issue by improving bounds checking in iOS 26.7, iPadOS 26.7, iOS 27, iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7.
Potential Impact
An attacker who can supply a malicious disk image may cause the affected device to crash unexpectedly, resulting in denial of service. There is no indication from the data that this vulnerability leads to code execution or data compromise. No known exploits in the wild have been reported.
Mitigation Recommendations
Apply the official fixes by upgrading to iOS 26.7 or later, iPadOS 26.7 or later, or the corresponding fixed macOS versions. These updates contain improved bounds checking that resolves the out-of-bounds write issue. Users running earlier versions should update promptly to mitigate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-09-01T21:13:17.749Z
- State
- PUBLISHED
Threat ID: 6aa8610455bf5e2cf59d2843
Added to database: 09/14/2026, 21:03:00 UTC
Last enriched: 09/14/2026, 22:30:38 UTC
Last updated: 09/15/2026, 03:01:22 UTC
Views: 2
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.