CVE-2021-30851

CVE-2021-30851: vulnerability in Apple Safari

Published 24 Aug 2021 · Updated 03 Aug 2024

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3Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackepss 2.4%

A memory corruption vulnerability was addressed with improved locking. This issue is fixed in Safari 15, tvOS 15, watchOS 8, iOS 15 and iPadOS 15. Processing maliciously crafted web content may lead to code execution.

Affected products

Apple · iOS and iPadOS Apple · Safari Apple · tvOS Apple · watchOS

Related CVEs — Apple Safari

In the same product, most dangerous first.

CVE-2025-43300CRITICALCVE-2025-43300EPSS 65.2%KEV CVE-2023-41064HIGHCVE-2023-41064EPSS 53.4%KEV CVE-2023-32434HIGHCVE-2023-32434EPSS 51.5%KEV CVE-2023-28205HIGHCVE-2023-28205EPSS 27.1%KEV CVE-2026-86950HIGHCVE-2026-86950EPSS 26.2%KEV CVE-2025-43529HIGHCVE-2025-43529EPSS 25.7%KEV

References

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H6MGXCX7P5AHWOQ6IRT477UKT7IS4DAD/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ON5SDVVPVPCAGFPW2GHYATZVZYLPW2L4/https://support.apple.com/en-us/HT212814 https://support.apple.com/en-us/HT212815 https://support.apple.com/en-us/HT212816 https://support.apple.com/en-us/HT212819 https://support.apple.com/kb/HT212869 https://www.debian.org/security/2021/dsa-4995 https://www.debian.org/security/2021/dsa-4996 http://www.openwall.com/lists/oss-security/2021/10/31/1