CVE-2026-64775
Memory initialization bug in Apple OS allows app-triggered system crashes (DoS).
Is CVE-2026-64775 being exploited?
Not confirmed. CVE-2026-64775 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 0.56% probability of exploitation in the next 30 days.
How severe is CVE-2026-64775?
CVE-2026-64775 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-2026-64775?
Yes. A fix has been recorded for CVE-2026-64775. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-64775 affect?
CVE-2026-64775 affects iOS (patched in 26.6), iPadOS (patched in 26.6), macOS Sequoia (patched in 15.7.8), macOS Sonoma (patched in 14.8.8), and 4 further products or versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-64775?
Apply listed Apple OS updates immediately and restrict untrusted apps.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
A malicious or crafted app can trigger a memory-init flaw to crash the OS, causing device/service outage and availability loss.
Immediate action required
- affected< 26.6
- affected< 14.8.8
- affected< 15.7.8
- affected< 26.6
- 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.