CVE-2026-43815 Apple macOS - Buffer Overflow

Apple macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6 contain a buffer overflow caused by insufficient bounds checking in AFPFS connection, letting attackers cause kernel memory corruption by connecting to a malicious AFPFS server, exploit requires attacker to control AFPFS server.

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

Details

Type
Buffer Overflow
Impact
Privilege Escalation, 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-787

Vendor fix

Update to macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6 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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