CVE-2026-28931

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-27 · updated 2026-07-29
Weakness: CWE-120

Description

A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, watchOS 26.6. Connecting to a malicious NFS server may lead to kernel memory corruption.

Affected products

Apple iPadOS: before 26.6 — fixed in 26.6
Apple Iphone Os: before 26.6 — fixed in 26.6
Apple macOS: from 26.0 before 26.6 — fixed in 26.6
Apple tvOS: before 26.6 — fixed in 26.6
Apple watchOS: before 26.6 — fixed in 26.6

How to fix

Upgrade to a fixed version: Apple iPadOS 26.6; Apple Iphone Os 26.6; Apple macOS 26.6; Apple tvOS 26.6; Apple watchOS 26.6. Check the vendor advisory for mitigations.

References

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