High-severity (CVSS 9.8) out-of-bounds write affecting multiple Apple OS releases used widely across enterprises and consumer devices; patch broadly recommended.
CVE-2026-64769
Out-of-bounds write in Apple OS can crash apps or corrupt heap; security updates released.
Is CVE-2026-64769 being exploited?
Not confirmed. CVE-2026-64769 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.65% probability of exploitation in the next 30 days.
How severe is CVE-2026-64769?
CVE-2026-64769 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-64769?
Yes. A fix has been recorded for CVE-2026-64769. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-64769 affect?
CVE-2026-64769 affects iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and 3 further products or versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-64769?
Apply the listed OS updates immediately across managed Apple devices.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote attacker can trigger an out-of-bounds write to crash apps, corrupt heap, and potentially achieve arbitrary code execution.
Immediate action required
- affected< 18.7.10
- affected< 26.6
- affected< 14.8.8
- affected< 15.7.8
- affected< 26.6
- affected< 26.6
- affected< 26.6
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.