High severity · published Oct 16, 2020
CVE-2020-9951
A use after free issue was addressed with improved memory management
8.8
CVSS
2.3%
EPSS
No
On KEV
Description
A use after free issue was addressed with improved memory management. This issue is fixed in Safari 14.0. Processing maliciously crafted web content may lead to arbitrary code execution.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.3% · higher than 83% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IO
iOS · Apple
before 14.0 · source: NVD
DL
Debian Linux · Debian
10.0 · source: NVD
IC
Icloud · Apple
before 11.5 · source: NVD
IT
Itunes · Apple
before 12.10.9 · source: NVD
SA
Safari · Apple
before 14.0 · source: NVD
TV
Tvos · Apple
before 14.0 · source: NVD
WA
Watchos · Apple
before 7.0 · source: NVD
WE
Webkitgtk+ · Webkit
through 2.30.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-9951
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-9951
Mailing List
http://seclists.org/fulldisclosure/2020/Nov/18
Mailing List
http://seclists.org/fulldisclosure/2020/Nov/19
Mailing List
http://seclists.org/fulldisclosure/2020/Nov/20
Mailing List
http://seclists.org/fulldisclosure/2020/Nov/22
Mailing List
http://www.openwall.com/lists/oss-security/2020/11/23/3
Third Party Advisory
https://security.gentoo.org/glsa/202012-10
More from iOS
10.0
CVE-2025-43300
Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability
10.0
CVE-2025-24201
Apple Multiple Products WebKit Out-of-Bounds Write Vulnerability
10.0
CVE-2025-24085
Apple Multiple Products Use-After-Free Vulnerability
9.8
CVE-2025-31200
Apple Multiple Products Memory Corruption Vulnerability
9.8
CVE-2025-31201
Apple Multiple Products Arbitrary Read and Write Vulnerability