CVE-2021-30858

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-30858
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 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8 /10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:N/AC:M/Au:N/C:P/I:P/A:P

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References
Link Resource
http://seclists.org/fulldisclosure/2021/Sep/25 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/27 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/29 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/38 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/39 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/50 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/20/1 Mailing List
http://www.openwall.com/lists/oss-security/2021/10/26/9 Mailing List
http://www.openwall.com/lists/oss-security/2021/10/27/1 Mailing List
http://www.openwall.com/lists/oss-security/2021/10/27/2 Mailing List
http://www.openwall.com/lists/oss-security/2021/10/27/4 Mailing 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/HT212804 Third Party Advisory
https://support.apple.com/en-us/HT212807 Third Party Advisory
https://support.apple.com/kb/HT212824 Third Party Advisory
https://www.debian.org/security/2021/dsa-4975 Mailing List Third Party Advisory
https://www.debian.org/security/2021/dsa-4976 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/25 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/27 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/29 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/38 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/39 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/50 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/20/1 Mailing List
http://www.openwall.com/lists/oss-security/2021/10/26/9 Mailing List
http://www.openwall.com/lists/oss-security/2021/10/27/1 Mailing List
http://www.openwall.com/lists/oss-security/2021/10/27/2 Mailing List
http://www.openwall.com/lists/oss-security/2021/10/27/4 Mailing 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/HT212804 Third Party Advisory
https://support.apple.com/en-us/HT212807 Third Party Advisory
https://support.apple.com/kb/HT212824 Third Party Advisory
https://www.debian.org/security/2021/dsa-4975 Mailing List Third Party Advisory
https://www.debian.org/security/2021/dsa-4976 Mailing List Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30858 US Government Resource
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

Configuration 3 (hide)

OR cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
History

27 Oct 2025, 17:38

Type Values Removed Values Added
References () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30858 - () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30858 - US Government Resource

22 Oct 2025, 00:17

Type Values Removed Values Added
References
  • () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30858 -

21 Oct 2025, 20:18

Type Values Removed Values Added
References
  • {'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30858', 'source': '134c704f-9b21-4f2e-91b3-4a467353bcc0'}

21 Oct 2025, 19:19

Type Values Removed Values Added
References
  • () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30858 -
Information

Published : 2021-08-24 19:15

Updated : 2025-10-27 17:38

NVD link : CVE-2021-30858

Mitre link : CVE-2021-30858

CVE.ORG link : CVE-2021-30858

JSON object : View

Products Affected

fedoraproject

  • fedora

debian

  • debian_linux

apple

  • iphone_os
  • macos
  • ipados
CWE
CWE-416

Use After Free