The issue was addressed with improved checks. This issue is fixed in Safari 18.5, iOS 18.5 and iPadOS 18.5, macOS Sequoia 15.5, tvOS 18.5, visionOS 2.5, watchOS 11.5. Processing maliciously crafted web content may lead to memory corruption.
https://support.apple.com/en-us/122721
https://support.apple.com/en-us/122720
https://support.apple.com/en-us/122719
https://support.apple.com/en-us/122716
https://support.apple.com/en-us/122404
https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-31223.json
https://bugzilla.redhat.com/show_bug.cgi?id=2448779
https://access.redhat.com/security/cve/CVE-2025-31223
https://access.redhat.com/errata/RHSA-2025:19352
https://access.redhat.com/errata/RHSA-2025:19165
https://access.redhat.com/errata/RHSA-2025:19157
https://access.redhat.com/errata/RHSA-2025:19109
https://access.redhat.com/errata/RHSA-2025:18097
https://access.redhat.com/errata/RHSA-2025:17807
https://access.redhat.com/errata/RHSA-2025:17802
https://access.redhat.com/errata/RHSA-2025:17743
https://access.redhat.com/errata/RHSA-2025:17741
https://access.redhat.com/errata/RHSA-2025:17643
http://seclists.org/fulldisclosure/2025/May/7
http://seclists.org/fulldisclosure/2025/May/5
http://seclists.org/fulldisclosure/2025/May/13