Sandbox escape via libc integer overflow
Published Jul 27, 2026 · Updated Jul 27, 2026
Integer overflow in libc in affected Apple operating systems allows local users to escape an app sandbox via a malicious app. libc inadequately validates input before an integer calculation, but Apple has not disclosed the function, input field, or overflowed operation. Exploitation requires a malicious local app and user interaction; success removes the app's sandbox restrictions.
Summary
What happened
Integer overflow in libc in affected Apple operating systems allows local users to escape an app sandbox via a malicious app. libc inadequately validates input before an integer calculation, but Apple has not disclosed the function, input field, or overflowed operation. Exploitation requires a malicious local app and user interaction; success removes the app's sandbox restrictions.
The record
- CVE
- CVE-2026-28973
- Published
- Jul 27, 2026
- Updated
- Jul 27, 2026
- Vendor
- Apple
- Product
- iOS and iPadOS
- Classifications
- CWE-190, T1611
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 27, 2026CVE publishedPublication date reported by the CVE source.
- Jul 27, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <26.6
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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