Skip to main content
CVE-2023-40436VulnerabilityPublished Updated

CVE-2023-40436: Apple macOS · An attacker may be able to cause unexpected system termination or read kernel memory

Affects Apple macOSSource CVE Database V5

0

Not known to be exploited.

Data as of 25 Oct 2026, 21:58 UTC

Severity
High

Rated High by the CNA (apple) · No CVSS score from NVD or the CNA

EPSS
1.2% chance of exploitation in 30 days – higher than 70% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 26 Sep 2023

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

What to do

AI-suggested

A fix is available in macOS Sonoma 14. Users and administrators should update to this version to remediate the vulnerability.

Description

CVE-2023-40436 is a vulnerability in Apple macOS that could allow an attacker to cause unexpected system termination or read kernel memory. The issue was addressed by Apple with improved bounds checks and is fixed in macOS Sonoma 14.

References

Community reviews

Loading reviews…