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CVE-2026-64691

CRITICAL
9.8
CVSS 3.1
Description
A buffer overflow was addressed with improved size validation. This issue is fixed in macOS Tahoe 26.6. An app may be able to cause unexpected system termination.

Metadata

CVE ID
CVE-2026-64691
State
PUBLISHED
Assigner
apple
Reserved
2026-07-20 18:09 UTC
Published
2026-07-27 20:14 UTC
Last updated
2026-07-28 14:54 UTC
Primary CWE
CWE-120
CWE-120 Buffer Copy without Checking Size of Input ('Classic…
Vendor / Product
Apple / macOS
Sources
cve.org  ·  NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
none
Automatable
yes
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
Apple macOS — 0 < 26.6
Weakness (CWE)
CWESourceDescription
— cna An app may be able to cause unexpected system termination
CWE-120 adp CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CVSS scores (1)
ScoreSeverityVersionSourceVector
9.8 CRITICAL 3.1 adp CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References (1)
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