CVE-2026-43773
Crafted disk image can crash or corrupt macOS kernel.
Is CVE-2026-43773 being exploited?
Not confirmed. CVE-2026-43773 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 0.60% probability of exploitation in the next 30 days.
How severe is CVE-2026-43773?
CVE-2026-43773 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-2026-43773?
Yes. A fix has been recorded for CVE-2026-43773. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-43773 affect?
CVE-2026-43773 affects macOS Sequoia (prior to 15.7.8), macOS Sonoma (prior to 14.8.8), macOS Tahoe (prior to 26.6). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-43773?
Install the macOS security updates immediately
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Mounting a malicious disk image can crash the system or corrupt kernel memory, causing denial-of-service and possible kernel‑level compromise.
Immediate action required
- affected< 14.8.8
- affected< 15.7.8
- 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.