AppleCVE-2026-112553

Apple macOS: out-of-bounds write

CVE-2026-112553 · Published Oct 26, 2026 · updated Oct 27, 2026

Unrated

Fix: upgrade to 15.8.2 or later (3 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 Sequoia 15.8.2, macOS Tahoe 26.7.2. Processing a maliciously crafted file may lead to unexpected app termination.

Affected versions

Package	Affected	Fixed in
macOS Product	< 15.8.2	15.8.2
	< 26.7.2	26.7.2
	< 27.2	27.2

Details and references

Severity from: no source yet

More Apple advisories

All Apple

UnscoredOct 26

Apple iOS and iPadOS: buffer overflowCVE-2026-86991fixed in 26.7.2 +2 UnscoredOct 26

The issue was addressed with improved memory handlingCVE-2026-86992fixed in 26.7.2 +2 UnscoredOct 26

This issue was addressed with improved input validationCVE-2026-86985fixed in 27.2 +2 UnscoredOct 26

Apple Safari: use after freeCVE-2026-86986fixed in 27.2 +2 Medium 5.5Oct 26

Apple iOS and iPadOS: missing authorizationCVE-2026-86987fixed in 27.2 Medium 4.3Oct 26

Apple iOS and iPadOS: memory corruptionCVE-2026-86988fixed in 27.2 +2