← CVE Radar
CVE-2021-30858Apple iOS, iPadOS, macOS Use-After-Free Vulnerability
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.
8.8 HIGHEPSS 13.37%⚡ Known Exploited (CISA KEV)NVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 8.8 | HIGH | 3.1NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| 6.8 | MEDIUM | 2.0NVD | AV:N/AC:M/Au:N/C:P/I:P/A:P |
CISA required action
⚡ Known exploited · remediation due Nov 17, 2021
Apply updates per vendor instructions.
Details
- CVE ID
- CVE-2021-30858
- Status
- Analyzed
- Assigner (CNA)
- apple
- Published
- Aug 24, 2021
- Last modified
- 2026-06-17 03:51 UTC
- Weaknesses
Affected Products
As published by the CNA in the CVE record.
ApplemacOS1 version range
- before 11.6
AppleiOS1 version range
- before 14.8
References
- seclists.org http://seclists.org/fulldisclosure/2021/Sep/25
- seclists.org http://seclists.org/fulldisclosure/2021/Sep/27
- seclists.org http://seclists.org/fulldisclosure/2021/Sep/29
- seclists.org http://seclists.org/fulldisclosure/2021/Sep/38
- seclists.org http://seclists.org/fulldisclosure/2021/Sep/39
- seclists.org http://seclists.org/fulldisclosure/2021/Sep/50
- openwall.com http://www.openwall.com/lists/oss-security/2021/09/20/1
- openwall.com http://www.openwall.com/lists/oss-security/2021/10/26/9
- openwall.com http://www.openwall.com/lists/oss-security/2021/10/27/1
- openwall.com http://www.openwall.com/lists/oss-security/2021/10/27/2
- openwall.com http://www.openwall.com/lists/oss-security/2021/10/27/4
- lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BO6DMTHZR57JDBOXPSNR2MKDMCRWV265/
- lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XYNV7ASK4LQVAUMJXNXBS3Z7RVDQ2N3W/
- support.apple.com https://support.apple.com/en-us/HT212804
- support.apple.com https://support.apple.com/en-us/HT212807
- support.apple.com https://support.apple.com/kb/HT212824
- debian.org https://www.debian.org/security/2021/dsa-4975
- debian.org https://www.debian.org/security/2021/dsa-4976
- cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30858