CVE-2026-84549 Apple macOS - Out of Bounds Read

Apple macOS Golden Gate 27, Sequoia 15.8, and Tahoe 26.7 contain an out-of-bounds read caused by insufficient bounds checking in NFS client, letting attackers cause system termination or kernel memory corruption, exploit requires connecting to malicious NFS server.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.57% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out of Bounds Read
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
14 September 2026
Updated
15 October 2026
Weakness
CWE-125

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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