CVE-2026-43773

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-27 · updated 2026-10-24
Weakness: CWE-125

Description

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Mounting a maliciously crafted disk image may cause unexpected system termination or corrupt kernel memory.

Affected products

Apple macOS: from 14.0 before 14.8.8; from 15.0 before 15.7.8; from 26.0 before 26.6 — fixed in 14.8.8, 15.7.8, 26.6

How to fix

Upgrade to a fixed version: Apple macOS 14.8.8, 15.7.8, 26.6. Check the vendor advisory for mitigations.

References

https://support.apple.com/en-us/128067
https://support.apple.com/en-us/128071
https://support.apple.com/en-us/128072

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