Is CVE-2023-40398 in the CISA KEV catalog?

No. CVE-2023-40398 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-40398?

CVE-2023-40398 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2023-40398?

CVE-2023-40398 has an EPSS score of 0.19% (9th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-40398?

Upgrade ipados to 16.4 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2023-40398

HIGH

8.8

CVSS v3

NVD

Description

This issue was addressed with improved checks. This issue is fixed in macOS Monterey 12.6.4, macOS Big Sur 11.7.5, macOS Ventura 13.3, iOS 16.4 and iPadOS 16.4. A sandboxed process may be able to circumvent sandbox restrictions.

How to fix

Remediation Available

ipadosNVD

Affected:< 16.4Fixed in:16.4CVE-2023-40398derived from NVD

iphone osNVD

Affected:< 16.4Fixed in:16.4CVE-2023-40398derived from NVD

macosNVD

Affected:>= 13.0, < 13.3Fixed in:13.3CVE-2023-40398derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Exploit Intelligence

0.19%probability of exploitation in 30 days

9thpercentile

Low risk: more likely to be exploited than 9% of all known CVEs.

References

Vendor Advisory4

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-03-13.