CVE-2018-4203
Description
An out-of-bounds read was addressed with improved bounds checking. This issue affected versions prior to iOS 12, macOS Mojave 10.14, tvOS 12, watchOS 5.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
An out-of-bounds read in Apple iOS, macOS, tvOS, and watchOS could allow a malicious app to disclose memory contents.
Vulnerability
An out-of-bounds read issue exists in Apple iOS, macOS, tvOS, and watchOS due to insufficient bounds checking. Affected versions are those prior to iOS 12, macOS Mojave 10.14, tvOS 12, and watchOS 5. The specific component is not disclosed in the available references.
Exploitation
A malicious application running locally on the device could trigger the out-of-bounds read. No user interaction or authentication beyond normal app permissions is required.
Impact
Successful exploitation may lead to disclosure of memory contents, potentially including sensitive information. The impact is limited to information disclosure.
Mitigation
Apple addressed this issue in iOS 12, macOS Mojave 10.14, tvOS 12, and watchOS 5. The updates were released on September 17, 2018 (iOS, tvOS) and September 24, 2018 (macOS). No workarounds have been published.
AI Insight generated on May 26, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
5- Range: <10.14
- Range: <12.0
- Range: <5.0
- Range: <12.0
- Range: Versions prior to: iOS 12, macOS Mojave 10.14, tvOS 12, watchOS 5
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
5- support.apple.com/kb/HT209106mitrex_refsource_MISC
- support.apple.com/kb/HT209107mitrex_refsource_MISC
- support.apple.com/kb/HT209108mitrex_refsource_MISC
- support.apple.com/kb/HT209139mitrex_refsource_MISC
- support.apple.com/kb/HT209193mitrex_refsource_MISC
News mentions
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