AppleCVE-2026-43773

Apple macOS: out-of-bounds read

CVE-2026-43773 · Published Jul 27, 2026 · updated Jul 28, 2026

Critical9.8

Fix: upgrade to 14.8.8 or later (3 fixed versions below)

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Mounting a maliciously crafted disk image may cause unexpected system termination or corrupt kernel memory.

Affected versions

Package	Affected	Fixed in
macOS Product	< 14.8.8	14.8.8
	< 15.7.8	15.7.8
	< 26.6	26.6

Details and references

CVSS 3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity from: CISA (its enrichment of the CVE record)
Weakness: CWE-125

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