A use after free issue was addressed with improved memory management. This issue is fixed in iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.
Advisories
Source ID Title
Debian DSA Debian DSA DSA-4975-1 webkit2gtk security update
Debian DSA Debian DSA DSA-4976-1 wpewebkit security update
EUVD EUVD EUVD-2021-17775 A use after free issue was addressed with improved memory management. This issue is fixed in iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.
Ubuntu USN Ubuntu USN USN-5087-1 WebKitGTK vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 22 Oct 2025 00:30:00 +0000


Tue, 21 Oct 2025 20:30:00 +0000


Tue, 21 Oct 2025 19:30:00 +0000


Wed, 29 Jan 2025 18:15:00 +0000

Type Values Removed Values Added
Metrics kev

{'dateAdded': '2021-11-03'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 14 Aug 2024 00:45:00 +0000

Type Values Removed Values Added
References

cve-icon MITRE

Status: PUBLISHED

Assigner: apple

Published:

Updated: 2025-10-21T23:25:37.307Z

Reserved: 2021-04-13T00:00:00.000Z

Link: CVE-2021-30858

cve-icon Vulnrichment

Updated: 2024-08-03T22:48:13.458Z

cve-icon NVD

Status : Modified

Published: 2021-08-24T19:15:14.253

Modified: 2025-10-22T00:17:33.993

Link: CVE-2021-30858

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-09-20T00:00:00Z

Links: CVE-2021-30858 - Bugzilla

cve-icon OpenCVE Enrichment

No data.