Apple Multiple Products WebKit Out-of-Bounds Read Vulnerability

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

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• cpe apple/ipadosversion unspecified
• cpe apple/iphone osversion unspecified
• cpe apple/macosversion unspecified
• cpe apple/safariversion unspecified
• cpe debian/debian linux11.0
• cpe fedoraproject/fedora38
• cpe webkitgtk/webkitgtk+version unspecified
• vendor Apple Multiple Productsversion unspecified

How to fix CVE-2023-42916

• Recommended remediation

  Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable. CISA due date Dec 25, 2023.

• Official advisories

  • CISA KEV · cisa.gov
  • CVE.org · cve.org
  • FIRST EPSS · first.org
  • NIST NVD · nvd.nist.gov
  • VulnCheck KEV · vulncheck.com

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Nov 30, 2023 · Catalog

   Detected

   Apple iOS, iPadOS, macOS, and Safari WebKit contain an out-of-bounds read vulnerability that may disclose sensitive information when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.

2. Dec 4, 2023 · CISA KEV

   Known exploited

   Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

3. Dec 25, 2023 · CISA KEV

   Remediation due

   Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

4. Jun 16, 2026 · Catalog

   Updated

   Apple iOS, iPadOS, macOS, and Safari WebKit contain an out-of-bounds read vulnerability that may disclose sensitive information when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.

Sources

• CISA KEVConfirmed exploitationCVE-2023-42916

  Apple iOS, iPadOS, macOS, and Safari WebKit contain an out-of-bounds read vulnerability that may disclose sensitive information when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.

  cisa.gov
• CVE.orgVulnerability recordCVE-2023-42916

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2023-42916

  30-day exploitation probability 17.8%

  first.org
• NIST NVDVulnerability recordCVE-2023-42916

  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 exploit

  nvd.nist.gov
• VulnCheck KEVConfirmed exploitationCVE-2023-42916

  Apple iOS, iPadOS, macOS, and Safari WebKit contain an out-of-bounds read vulnerability that may disclose sensitive information when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari

  vulncheck.com

References

• VulnCheck exploitation evidence · docs.google.com
• VulnCheck exploitation evidence · isc.sans.edu
• CISA note · nvd.nist.gov
• VulnCheck exploitation evidence · storage.googleapis.com
• CISA note · support.apple.com
• CISA note · support.apple.com
• CISA note · support.apple.com
• Vendor Advisory · support.apple.com
• Vendor Advisory · support.apple.com
• Vendor Advisory · support.apple.com
• VulnCheck exploitation evidence · ti.qianxin.com
• VulnCheck exploitation evidence · cisa.gov

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.