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.
Metrics
CVSS 3.1 8.8/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Apple | macOS | >= unspecified, < 11.6 |
| Apple | iOS | >= unspecified, < 14.8 |
References
- http://seclists.org/fulldisclosure/2021/Sep/25Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/27Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/29Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/38Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/39Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/50Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/20/1Mailing List
- http://www.openwall.com/lists/oss-security/2021/10/26/9Mailing List
- http://www.openwall.com/lists/oss-security/2021/10/27/1Mailing List
- http://www.openwall.com/lists/oss-security/2021/10/27/2Mailing List
- http://www.openwall.com/lists/oss-security/2021/10/27/4Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BO6DMTHZR57JDBOXPSNR2MKDMCRWV265/Release Notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XYNV7ASK4LQVAUMJXNXBS3Z7RVDQ2N3W/Release Notes
- https://support.apple.com/en-us/HT212804Third Party Advisory
- https://support.apple.com/en-us/HT212807Third Party Advisory
- https://support.apple.com/kb/HT212824Third Party Advisory
- https://www.debian.org/security/2021/dsa-4975Mailing List, Third Party Advisory
- https://www.debian.org/security/2021/dsa-4976Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/25Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/27Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/29Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/38Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/39Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/50Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/20/1Mailing List
- http://www.openwall.com/lists/oss-security/2021/10/26/9Mailing List
- http://www.openwall.com/lists/oss-security/2021/10/27/1Mailing List
- http://www.openwall.com/lists/oss-security/2021/10/27/2Mailing List
- http://www.openwall.com/lists/oss-security/2021/10/27/4Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BO6DMTHZR57JDBOXPSNR2MKDMCRWV265/Release Notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XYNV7ASK4LQVAUMJXNXBS3Z7RVDQ2N3W/Release Notes
- https://support.apple.com/en-us/HT212804Third Party Advisory
- https://support.apple.com/en-us/HT212807Third Party Advisory
- https://support.apple.com/kb/HT212824Third Party Advisory
- https://www.debian.org/security/2021/dsa-4975Mailing List, Third Party Advisory
- https://www.debian.org/security/2021/dsa-4976Mailing List, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30858US Government Resource
Timeline
- Published
- Aug 24, 2021
- Last modified
- Jun 17, 2026
- Added to CISA KEV
- Nov 3, 2021
- NVD status
- Analyzed