CVE-2026-43690 Apple CVE debrief

Who should care

Defenders responsible for macOS systems, particularly those with local user access, should assess exposure and prioritize patching. The vulnerability could allow local users to access sensitive kernel memory, leading to potential privilege escalation or data exposure. Defenders should verify and apply patches for affected macOS versions to prevent exploitation.

Why it matters

A local user may be able to read kernel memory due to a race condition in macOS, which could lead to potential privilege escalation or data exposure. Defenders should prioritize verifying and applying patches for affected macOS versions.

• Local users may be able to access sensitive kernel memory
• Potential for privilege escalation or data exposure
• Verification of patch application is necessary to prevent exploitation

Technical summary

A race condition was addressed with improved locking in macOS, which could allow a local user to read kernel memory. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7. The vulnerability could lead to potential privilege escalation or data exposure. Defenders should prioritize verifying and applying patches for affected macOS versions to prevent exploitation. The vulnerability affects local users and could allow access to sensitive kernel memory. The official CVE Program record and NIST NVD detail page provide additional information on the vulnerability.

Defensive priority

Defenders should prioritize verifying and applying patches for affected macOS versions, as the vulnerability could allow local users to access sensitive kernel memory.

Recommended defensive actions

• Verify and apply patches for affected macOS versions
• Monitor system logs for potential exploitation attempts
• Restrict access to sensitive kernel memory
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide details on the vulnerability, affected products, and fixed versions. However, the CVSS score and severity are not provided. The vulnerability could allow local users to access sensitive kernel memory. Defenders should verify and apply patches for affected macOS versions. The official CVE Program record and NIST NVD detail page provide additional information on the vulnerability.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.