What’s Vulnerable › Vulnerabilities

CVE-2023-42916: Apple Multiple Products WebKit Out-of-Bounds Read Vulnerability

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2023-12-04
• EPSS: 17.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-11-30 · updated 2026-06-17
• Weakness: CWE-125

Description

An out-of-bounds read was addressed with improved input validation. This issue is fixed in iOS 17.1.2 and iPadOS 17.1.2, macOS Sonoma 14.1.2, Safari 17.1.2. Processing web content may disclose sensitive information. Apple is aware of a report that this issue may have been exploited against versions of iOS before iOS 16.7.1.

Affected products

• Apple iPadOS: before 15.8.1; from 16.0 before 16.7.3; from 17.0 before 17.1.2 — fixed in 15.8.1, 16.7.3, 17.1.2
• Apple Iphone Os: before 15.8.1; from 16.0 before 16.7.3; from 17.0 before 17.1.2 — fixed in 15.8.1, 16.7.3, 17.1.2
• Apple macOS: from 14.0 before 14.1.2 — fixed in 14.1.2
• Apple Safari: before 17.1.2 — fixed in 17.1.2
• Debian Linux: 11.0, 12.0
• Fedoraproject Fedora: 38, 39
• Webkitgtk+: before 2.42.3 — fixed in 2.42.3

How to fix

Upgrade to a fixed version: Apple iPadOS 15.8.1, 16.7.3, 17.1.2; Apple Iphone Os 15.8.1, 16.7.3, 17.1.2; Apple macOS 14.1.2; Apple Safari 17.1.2; Webkitgtk+ 2.42.3. Check the vendor advisory for mitigations.

References

• http://seclists.org/fulldisclosure/2023/Dec/12
• http://seclists.org/fulldisclosure/2023/Dec/13
• http://seclists.org/fulldisclosure/2023/Dec/3
• http://seclists.org/fulldisclosure/2023/Dec/4
• http://seclists.org/fulldisclosure/2023/Dec/5
• http://seclists.org/fulldisclosure/2023/Dec/8
• http://seclists.org/fulldisclosure/2024/Jan/35
• http://www.openwall.com/lists/oss-security/2023/12/05/1
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AD2KIHHCUBQC2YYH3FJWAHI5BG3QETOH/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/P5LQS6VEI7VIZNC7QGQ62EOV45R5RJIR/
• https://security.gentoo.org/glsa/202401-04
• https://support.apple.com/en-us/HT214031

Get alerted when CVE-2023-42916 or the next vulnerability affects your stack