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PatchSiren cyber security CVE debrief

CVE-2023-28204 Apple CVE debrief

CVE-2023-28204 is an Apple WebKit out-of-bounds read vulnerability affecting multiple Apple products. CISA added it to the Known Exploited Vulnerabilities catalog on 2023-05-22, so defenders should treat Apple’s updates as urgent and verify remediation across managed fleets.

Vendor
Apple
Product
Multiple Products
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2023-05-22
Original CVE updated
2023-05-22
Advisory published
2023-05-22
Advisory updated
2023-05-22

Who should care

Apple device administrators, security teams, and end users running Apple products that rely on WebKit should pay close attention, especially where rapid patch deployment is needed across many devices.

Technical summary

The issue is described as an out-of-bounds read in WebKit. The supplied corpus does not include deeper exploitation mechanics or product/version specifics, but CISA’s KEV listing indicates the vulnerability was known to be exploited and Apple published corresponding support advisories for remediation.

Defensive priority

High. A CISA KEV listing means this vulnerability should be prioritized for prompt patching and verification, using Apple’s vendor guidance as the authoritative remediation path.

Recommended defensive actions

  • Apply Apple updates using the vendor instructions referenced in the KEV entry.
  • Inventory Apple devices and confirm which systems have received the relevant WebKit fixes.
  • Prioritize remediation across user devices and managed endpoints that regularly process web content.
  • Track Apple support advisories for product-specific update guidance and validate completion after deployment.

Evidence notes

Evidence is limited to the supplied CISA KEV metadata and linked official resources. The corpus identifies the issue as "Apple Multiple Products WebKit Out-of-Bounds Read Vulnerability," marks it as a known exploited vulnerability, and references Apple support advisories plus NVD/CVE records. No additional exploit details, affected version lists, or impact metrics were provided.

Official resources

CISA KEV entry dated 2023-05-22; Apple support advisory links are referenced in the source metadata. This debrief uses only the supplied corpus and official links.