CVE-2026-28819

Out-of-bounds write allows kernel-privileged code execution in Apple OSes

Published May 11, 2026 CVSS 3.1 · 5.4 Medium EPSS 6.5% KEV · Not listed
Description
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5. An app may be able to execute arbitrary code with kernel privileges.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Out-of-bounds write allows kernel-privileged code execution in Apple OSes
Type Values Removed Values Added
Title Kernel-Privileged Code Execution via Out-of-Bounds Write in Apple Operating Systems
Type Values Removed Values Added
Title Kernel-Privileged Code Execution via Out-of-Bounds Write in Apple Operating Systems
Type Values Removed Values Added
Title Out-of-Bounds Write in Apple OS Allows Kernel-Privileged Code Execution
Type Values Removed Values Added
Title Out-of-Bounds Write in Apple OS Allows Kernel-Privileged Code Execution
Weaknesses CWE-122
Type Values Removed Values Added
First Time appeared Apple ipados
Apple iphone Os
CPEs cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
Vendors & Products Apple ipados
Apple iphone Os
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Kernel Privilege Escalation via Out‑of‑Bounds Write in Apple iOS, iPadOS, and macOS
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'}

Type Values Removed Values Added
Title Kernel Privilege Escalation via Out‑of‑Bounds Write in Apple iOS, iPadOS, and macOS
Weaknesses CWE-122
CWE-787
Type Values Removed Values Added
First Time appeared Apple
Apple ios And Ipados
Apple macos
Vendors & Products Apple
Apple ios And Ipados
Apple macos
Type Values Removed Values Added
Description An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5. An app may be able to execute arbitrary code with kernel privileges.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
apple
Published
Updated
Nov 3, 2026, 10:13 PM
Reserved
Mar 3, 2026, 4:36 PM
Status
Analyzed
Published
May 11, 2026, 9:18 PM
Modified
Nov 3, 2026, 11:17 PM