CVE-2025-43421 — Out-of-bounds Read in Apple IOS AND Ipados

CWE-125 — Out-of-bounds ReadCWE-787 — Out-of-bounds WriteCWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer12 documents8 sources
Severity
4.3MEDIUMNVD
EPSS
0.0%
top 88.72%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
6
Apple IOS AND IpadosApple MacosApple Safari+3 more
Timeline
PublishedNov 4
Latest updateJan 5

Description

Multiple issues were addressed by disabling array allocation sinking. This issue is fixed in Safari 26.1, iOS 26.1 and iPadOS 26.1, macOS Tahoe 26.1, visionOS 26.1. Processing maliciously crafted web content may lead to an unexpected process crash.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:LExploitability: 2.8 | Impact: 1.4

Affected Packages8 packages

▶CVEListV5apple/macos< 26.1
▶CVEListV5apple/safari< 26.1
▶NVDapple/ipados< 26.1
▶NVDapple/safari< 26.1
▶CVEListV5apple/visionos< 26.1

🔴Vulnerability Details

4
GHSA
GHSA-43xx-j7mw-696v: Multiple issues were addressed by disabling array allocation sinking↗2025-11-04
▶
OSV
CVE-2025-43421: Multiple issues were addressed by disabling array allocation sinking↗2025-11-04
▶
CVEList
CVE-2025-43421: Multiple issues were addressed by disabling array allocation sinking↗2025-11-04
▶
OSV
CVE-2025-43421: Multiple issues were addressed by disabling array allocation sinking↗2025-11-04
▶

📋Vendor Advisories

7
Ubuntu
WebKitGTK vulnerabilities↗2026-01-05
▶
Red Hat
webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash↗2025-11-20
▶
Apple
CVE-2025-43421: macOS Tahoe 26.1↗2025-11-03
▶
Apple
CVE-2025-43421: iOS 26.1 and iPadOS 26.1↗2025-11-03
▶
Apple
CVE-2025-43421: Safari 26.1↗2025-11-03
▶
CVE-2025-43421 — Out-of-bounds Read in Apple | cvebase