CVE-2026-84512 Apple macOS - Buffer Overflow

Apple macOS Golden Gate 27, Sequoia 15.8, and Tahoe 26.7 contain a buffer overflow caused by insufficient bounds checking when mounting disk images, letting attackers cause system termination or kernel memory corruption, exploit requires mounting a crafted disk image.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.48% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
14 September 2026
Updated
15 October 2026
Weakness
CWE-120

Vendor fix

Update to macOS Golden Gate 27, Sequoia 15.8, Tahoe 26.7 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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