Sensitive information disclosure via WebKit out-of-bounds read
Published Nov 30, 2023 · Updated Oct 21, 2025
Out-of-bounds read in WebKit in affected Apple operating systems and Safari allows remote attackers to disclose sensitive information. WebKit processes crafted web content without sufficient input validation and reads beyond the intended memory buffer. A user must process attacker-controlled web content; the resulting read exposes memory data, and exploitation was reported on iOS before 16.7.1.
Summary
What happened
Out-of-bounds read in WebKit in affected Apple operating systems and Safari allows remote attackers to disclose sensitive information. WebKit processes crafted web content without sufficient input validation and reads beyond the intended memory buffer. A user must process attacker-controlled web content; the resulting read exposes memory data, and exploitation was reported on iOS before 16.7.1.
The record
- CVE
- CVE-2023-42916
- Published
- Nov 30, 2023
- Updated
- Oct 21, 2025
- Vendor
- Apple
- Product
- iOS
- Classifications
- CWE-125, T1189
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 30, 2023CVE publishedPublication date reported by the CVE source.
- Oct 21, 2025Record 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 <17.1.2
What conditions does exploitation require?
What is affected?
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.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Reported exploitation
- Apple Multiple Products WebKit Out-of-Bounds Read Vulnerabilityknown exploited catalog
Technologies
Your stack
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Your stack
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