Critical severity · published Jul 27, 2026
CVE-2026-64767
A buffer overflow was addressed with improved bounds checking
9.8
CVSS
0.9%
EPSS
No
On KEV
Description
A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sequoia 15.8.2, macOS Sonoma 14.8.8, macOS Tahoe 26.6. A remote attacker may be able to cause unexpected system termination or corrupt kernel memory.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 59% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
macOS · Apple
before 14.8.8; before 15.7.8; before 15.8.2; before 26.6 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64767
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-64767
Release Notes
https://support.apple.com/en-us/128067
Release Notes
https://support.apple.com/en-us/128071
Release Notes
https://support.apple.com/en-us/128072
support.apple.com
https://support.apple.com/en-us/149523
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