AppleCVE-2026-84496

Apple macOS: out-of-bounds write

CVE-2026-84496 · Published Oct 26, 2026 · updated Oct 28, 2026

Medium6.5

Fix: upgrade to 26.7.2 or later (2 fixed versions below)

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27.2, macOS Tahoe 26.7.2. Mounting a maliciously crafted disk image may cause unexpected system termination or corrupt kernel memory.

Affected versions

Package	Affected	Fixed in
macOS Product	< 26.7.2	26.7.2
	< 27.2	27.2

Details and references

CVSS 3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Severity from: CISA (its enrichment of the CVE record)
Weakness: CWE-787

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