Remote heap corruption via Model I/O out-of-bounds write
Published Jul 27, 2026 · Updated Jul 27, 2026
Out-of-bounds write in Apple Model I/O on iOS, iPadOS, macOS, tvOS, and visionOS allows remote attackers to crash apps or corrupt heap memory. The Model I/O component performs an out-of-bounds write because its bounds check is insufficient, but Apple has not disclosed the parser, input format, or unchecked length operation. The public assessment identifies a remote, unauthenticated path with no user interaction and bounds the documented outcomes to application termination and heap corruption.
Summary
What happened
Out-of-bounds write in Apple Model I/O on iOS, iPadOS, macOS, tvOS, and visionOS allows remote attackers to crash apps or corrupt heap memory. The Model I/O component performs an out-of-bounds write because its bounds check is insufficient, but Apple has not disclosed the parser, input format, or unchecked length operation. The public assessment identifies a remote, unauthenticated path with no user interaction and bounds the documented outcomes to application termination and heap corruption.
The record
- CVE
- CVE-2026-64769
- Published
- Jul 27, 2026
- Updated
- Jul 27, 2026
- Vendor
- Apple
- Product
- iOS and iPadOS
- Classifications
- CWE-787, T1499.004
- Attack vector
- network
- 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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