CVE-2023-43000highunder attackCWE-416

CVE-2023-43000: high-severity vulnerability in Apple macOS

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51Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA.

ssvc Actcvss 8.8epss 4.0%
from disclosure to weapon
Published on NVDNov 5
CISA KEV+120d
What the vendors declare (VEX)

Official vendor statements in CSAF/VEX format: whether their product is affected, already fixed, or ruled out — and why. These are the vendor's assertions, not Vexday's judgment.

Red HatVEX document ↗
Affected
2 products (9 components)
Red Hat Enterprise Linux 7 · Red Hat Enterprise Linux 6
workaround: Do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell…
Fixed
14 products (412 components)
Red Hat Enterprise Linux AppStream (v. 8) · Red Hat Enterprise Linux AppStream (v. 9) · Red Hat Enterprise Linux AppStream E4S (v.8.6) · Red Hat Enterprise Linux AppStream E4S (v.9.0) · Red Hat Enterprise Linux AppStream EUS (v.8.8) · and others 9
fix ↗
Action required by CISAfederal deadline: 2026-03-26

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

In short

A use-after-free vulnerability in Safari and Apple systems allows attackers to corrupt memory by processing malicious web content, potentially leading to crashes or code execution.

Technical detail

Use-after-free (CWE-416) in Safari's web content processing allows an attacker to access freed memory through specially crafted HTML/JavaScript, causing memory corruption. The vulnerability requires user interaction (visiting a malicious webpage) and affects multiple Apple platforms. Fixed in macOS Ventura 13.5, iOS/iPadOS 16.6 and 15.8.7, Safari 16.6.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

A use-after-free issue was addressed with improved memory management. This issue is fixed in macOS Ventura 13.5, iOS 16.6 and iPadOS 16.6, Safari 16.6, iOS 15.8.7 and iPadOS 15.8.7. Processing maliciously crafted web content may lead to memory corruption.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
Apple · iOS and iPadOSApple · macOSApple · Safari
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