How severe is CVE-2023-40396?

CVE-2023-40396 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-40396 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-40396?

CVE-2023-40396 primarily affects Apple Ipados. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-40396?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2023-40396 have an EU (EUVD) identifier?

Yes. CVE-2023-40396 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-44967.

When was CVE-2023-40396 published?

CVE-2023-40396 was published on 2024-07-29 and last updated on 2026-06-17.

CVE-2023-40396

CVE-2023-40396 is a high-severity vulnerability in Apple Ipados with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-77.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-44967
Weakness: CWE-77
Affected product: Apple Ipados
Published: 2024-07-29
Last modified: 2026-06-17

Description

The issue was addressed with improved memory handling. This issue is fixed in iOS 17 and iPadOS 17, macOS Sonoma 14, watchOS 10, tvOS 17. An app may be able to execute arbitrary code with kernel privileges.

Frequently asked questions

What is CVE-2023-40396?: The issue was addressed with improved memory handling. This issue is fixed in iOS 17 and iPadOS 17, macOS Sonoma 14, watchOS 10, tvOS 17. An app may be able to execute arbitrary code with kernel privileges.
How severe is CVE-2023-40396?: CVE-2023-40396 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-40396 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-40396?: CVE-2023-40396 primarily affects Apple Ipados. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-40396?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2023-40396 have an EU (EUVD) identifier?: Yes. CVE-2023-40396 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-44967.
When was CVE-2023-40396 published?: CVE-2023-40396 was published on 2024-07-29 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*

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