App termination via out-of-bounds file read
Published Jul 27, 2026 · Updated Jul 27, 2026
Out-of-bounds read in Apple macOS Disk Images allows attackers to terminate an app by parsing a maliciously crafted file. The Disk Images component reads beyond a buffer boundary while parsing attacker-controlled file data because its bounds checks are insufficient. Exploitation requires user interaction with the file; the reported consequence is application termination, with no integrity impact established.
Summary
What happened
Out-of-bounds read in Apple macOS Disk Images allows attackers to terminate an app by parsing a maliciously crafted file. The Disk Images component reads beyond a buffer boundary while parsing attacker-controlled file data because its bounds checks are insufficient. Exploitation requires user interaction with the file; the reported consequence is application termination, with no integrity impact established.
The record
- CVE
- CVE-2026-43747
- Published
- Jul 27, 2026
- Updated
- Jul 27, 2026
- Vendor
- Apple
- Product
- macOS
- Classifications
- CWE-125, T1204.002
- 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 <14.8.8
- Affected versionversion=0 <15.7.8
- Affected versionversion=0 <26.6
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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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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