CVE-2023-40447

Name: CVE-2023-40447
Creator: NVD / NIST
Published: 2023-10-25T19:15:09.657+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.52%

Last modified Jun 17, 2026

CVE-2023-40447 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. The issue was addressed with improved memory handling. This issue is fixed in iOS 17.1 and iPadOS 17.1, watchOS 10.1, iOS 16.7.2 and iPadOS 16.7.2, macOS Sonoma 14.1, Safari 17.1, tvOS 17.1. EPSS estimates a 1.52% chance of exploitation in the next 30 days.

Description

The issue was addressed with improved memory handling. This issue is fixed in iOS 17.1 and iPadOS 17.1, watchOS 10.1, iOS 16.7.2 and iPadOS 16.7.2, macOS Sonoma 14.1, Safari 17.1, tvOS 17.1. Processing web content may lead to arbitrary code execution.

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:H

EPSS Probability

1.52%

71.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Apple	Safari	< 17.1
Apple	Ipados	< 16.7.2
Apple	Ipados	>= 17.0, < 17.1
Apple	Iphone Os	< 16.7.2
Apple	Iphone Os	>= 17.0, < 17.1
Apple	Macos	>= 14.0, < 14.1
Apple	Tvos	< 17.1
Apple	Watchos	< 10.1

References

http://seclists.org/fulldisclosure/2023/Oct/19Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2023/Oct/22Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2023/Oct/23Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2023/Oct/24Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2023/Oct/25Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2023/Oct/27Mailing List, Third Party Advisory
https://support.apple.com/en-us/HT213981Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT213982Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT213984Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT213986Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT213987Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT213988Release Notes, Vendor Advisory
https://support.apple.com/kb/HT213984
http://seclists.org/fulldisclosure/2023/Oct/19Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2023/Oct/22Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2023/Oct/23Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2023/Oct/24Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2023/Oct/25Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2023/Oct/27Mailing List, Third Party Advisory
https://support.apple.com/en-us/HT213981Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT213982Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT213984Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT213986Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT213987Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT213988Release Notes, Vendor Advisory
https://support.apple.com/kb/HT213984

Timeline

Published: Oct 25, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-40447?

How severe is CVE-2023-40447?

CVE-2023-40447 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.52% probability of exploitation in the next 30 days.

How do I fix CVE-2023-40447?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-40447?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST