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    Dashboard / CVE / CVE-2023-40420

    CVE-2023-40420

    The issue was addressed with improved memory handling. This issue is fixed in macOS Ventura 13.6, tvOS 17, iOS 16.7 and iPadOS 16.7, macOS Monterey 12.7, watchOS 10, iOS 17 and iPadOS 17, macOS Sonoma 14. Processing web content may lead to a denial-of-service.

    Published:Sep 26, 2023
    Last Modified:Nov 4, 2025
    EPS:Sep 26, 2023
    EPSS Score:0.00167
    CVSS Score:6.5

    Affected Products

    Vendor
    Apple
    Product
    Ipados
    Vendor
    Apple
    Product
    Iphone Os
    Vendor
    Apple
    Product
    Macos
    Vendor
    Apple
    Product
    Tvos
    Vendor
    Apple
    Product
    Watchos

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-65367 (CVSS 5.5) — A null pointer dereference was addressed with improved input validation. This issue is fixed in iOS 18.7.9 and…
    CVE-2026-43670 (CVSS 8.8) — A Content Security Policy bypass was addressed with improved enforcement in AudioWorklet contexts. This issue …
    CVE-2026-65331 (CVSS 4.3) — This issue was addressed through improved state management. This issue is fixed in Safari 26.6.1, iOS 18.7.10 …
    CVE-2026-64760 (CVSS 5.5) — An information leakage was addressed with additional validation. This issue is fixed in iOS 18.7.10 and iPadOS…
    CVE-2026-43794 (CVSS 8.8) — A memory corruption issue was addressed with improved memory handling. This issue is fixed in Safari 26.6.1, i…
    CVE-2026-65346 (CVSS 8.8) — An integer overflow was addressed with improved input validation. This issue is fixed in iOS 26.6.1 and iPadOS…
    CVE-2026-65351 (CVSS 4.3) — This issue was addressed through improved state management. This issue is fixed in Safari 26.6.1, iOS 26.6.1 a…
    CVE-2026-64782 (CVSS 3.1) — A memory corruption vulnerability was addressed with improved locking. This issue is fixed in Safari 26.6.1, i…
    CVE-2026-65347 (CVSS 6.5) — The issue was addressed with improved checks. This issue is fixed in iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe…
    CVE-2026-43795 (CVSS 4.3) — The issue was addressed with improved memory handling. This issue is fixed in Safari 26.6.1, iOS 18.7.10 and i…

    References

    http://seclists.org/fulldisclosure/2023/Oct/10
    http://seclists.org/fulldisclosure/2023/Oct/3
    http://seclists.org/fulldisclosure/2023/Oct/4
    http://seclists.org/fulldisclosure/2023/Oct/5
    http://seclists.org/fulldisclosure/2023/Oct/6
    http://seclists.org/fulldisclosure/2023/Oct/8
    http://seclists.org/fulldisclosure/2023/Oct/9
    https://support.apple.com/en-us/HT213927
    https://support.apple.com/en-us/HT213931
    https://support.apple.com/en-us/HT213932
    https://support.apple.com/en-us/HT213936
    https://support.apple.com/en-us/HT213937
    https://support.apple.com/en-us/HT213938
    https://support.apple.com/en-us/HT213940
    http://seclists.org/fulldisclosure/2023/Oct/10
    http://seclists.org/fulldisclosure/2023/Oct/3
    http://seclists.org/fulldisclosure/2023/Oct/4
    http://seclists.org/fulldisclosure/2023/Oct/5
    http://seclists.org/fulldisclosure/2023/Oct/6
    http://seclists.org/fulldisclosure/2023/Oct/8
    http://seclists.org/fulldisclosure/2023/Oct/9
    https://support.apple.com/en-us/HT213927
    https://support.apple.com/en-us/HT213931
    https://support.apple.com/en-us/HT213932
    https://support.apple.com/en-us/HT213936
    https://support.apple.com/en-us/HT213937
    https://support.apple.com/en-us/HT213938
    https://support.apple.com/en-us/HT213940
    https://support.apple.com/kb/HT213931
    https://support.apple.com/kb/HT213932
    https://support.apple.com/kb/HT213936
    https://support.apple.com/kb/HT213937
    https://support.apple.com/kb/HT213938
    https://support.apple.com/kb/HT213940

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High