CVE-2023-40436
Critical
Published: 27 September 2023
Published
27 September 2023
Modified
04 November 2025
KEV Added
—
Patch
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CVSS Score v3.1
9.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
EPSS Score
0.0039
60.7th percentile
Risk Priority
18
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2023-40436 is a critical-severity Out-of-bounds Read (CWE-125) vulnerability in Apple Macos. Its CVSS base score is 9.1 (Critical).
Operationally, ranked in the top 39.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-45007
Vulnerability details
The issue was addressed with improved bounds checks. This issue is fixed in macOS Sonoma 14. An attacker may be able to cause unexpected system termination or read kernel memory.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
apple
macos
≤ 14.0
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.