Unrated severityCISA KEVNVD Advisory· Published Aug 24, 2021· Updated Oct 21, 2025
CVE-2021-30858
CVE-2021-30858
Description
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.
Affected products
2- Range: unspecified
- Apple/iOSv5Range: unspecified
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
18- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BO6DMTHZR57JDBOXPSNR2MKDMCRWV265/mitrevendor-advisoryx_refsource_FEDORA
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XYNV7ASK4LQVAUMJXNXBS3Z7RVDQ2N3W/mitrevendor-advisoryx_refsource_FEDORA
- www.debian.org/security/2021/dsa-4975mitrevendor-advisoryx_refsource_DEBIAN
- www.debian.org/security/2021/dsa-4976mitrevendor-advisoryx_refsource_DEBIAN
- seclists.org/fulldisclosure/2021/Sep/25mitremailing-listx_refsource_FULLDISC
- seclists.org/fulldisclosure/2021/Sep/27mitremailing-listx_refsource_FULLDISC
- seclists.org/fulldisclosure/2021/Sep/29mitremailing-listx_refsource_FULLDISC
- seclists.org/fulldisclosure/2021/Sep/38mitremailing-listx_refsource_FULLDISC
- seclists.org/fulldisclosure/2021/Sep/39mitremailing-listx_refsource_FULLDISC
- seclists.org/fulldisclosure/2021/Sep/50mitremailing-listx_refsource_FULLDISC
- www.openwall.com/lists/oss-security/2021/09/20/1mitremailing-listx_refsource_MLIST
- www.openwall.com/lists/oss-security/2021/10/26/9mitremailing-listx_refsource_MLIST
- www.openwall.com/lists/oss-security/2021/10/27/1mitremailing-listx_refsource_MLIST
- www.openwall.com/lists/oss-security/2021/10/27/2mitremailing-listx_refsource_MLIST
- www.openwall.com/lists/oss-security/2021/10/27/4mitremailing-listx_refsource_MLIST
- support.apple.com/en-us/HT212804mitrex_refsource_MISC
- support.apple.com/en-us/HT212807mitrex_refsource_MISC
- support.apple.com/kb/HT212824mitrex_refsource_CONFIRM
News mentions
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