CVE-2021-30858

high

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.

References

https://www.debian.org/security/2021/dsa-4976

https://www.debian.org/security/2021/dsa-4975

https://support.apple.com/kb/HT212824

https://support.apple.com/en-us/HT212807

https://support.apple.com/en-us/HT212804

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XYNV7ASK4LQVAUMJXNXBS3Z7RVDQ2N3W/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BO6DMTHZR57JDBOXPSNR2MKDMCRWV265/

http://seclists.org/fulldisclosure/2021/Sep/50

http://seclists.org/fulldisclosure/2021/Sep/39

http://seclists.org/fulldisclosure/2021/Sep/38

http://seclists.org/fulldisclosure/2021/Sep/29

http://seclists.org/fulldisclosure/2021/Sep/27

http://seclists.org/fulldisclosure/2021/Sep/25

https://www.tenable.com/cyber-exposure/2021-threat-landscape-retrospective

http://www.openwall.com/lists/oss-security/2021/10/27/4

http://www.openwall.com/lists/oss-security/2021/10/27/2

http://www.openwall.com/lists/oss-security/2021/10/27/1

http://www.openwall.com/lists/oss-security/2021/10/26/9

http://www.openwall.com/lists/oss-security/2021/09/20/1

Details

Source: Mitre, NVD

Published: 2021-08-24

Updated: 2025-04-02

Known Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.01119