by Kastro
Paper/Archive/CVE-2026-64691

CVE-2026-64691

Apple macOS — A buffer overflow was addressed with improved size validation.

EPSS 0.5%CVSS 9.8
critical.is priorityof 100
38
CVSS 9.8 (ADP)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 40.5.405 × 208.1No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

A buffer overflow was addressed with improved size validation. This issue is fixed in macOS Tahoe 26.6. An app may be able to cause unexpected system termination.

Affected

ProductAffectedFixed inSource
macOS< 26.626.6CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refsupport.apple.com/en-us/128067