CVE-2025-43434: Use After Free

Published Nov 3, 2025
·
Updated

A use-after-free issue was addressed with improved memory management. This issue is fixed in iOS 18.7.2 and iPadOS 18.7.2. Processing maliciously crafted web content may lead to an unexpected Safari crash.

Other sources

A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.1, iOS 18.7.2 and iPadOS 18.7.2, iOS 26.1 and iPadOS 26.1, macOS Tahoe 26.1, visionOS 26.1, watchOS 26.1. Processing maliciously crafted web content may lead to an unexpected Safari crash.

— MITRE

Accessibility. A permissions issue was addressed with additional restrictions.

— Apple

Admin Framework. A logic issue was addressed with improved checks.

— Apple

Admin Framework. The issue was addressed with improved checks.

— Apple

App Store. A logging issue was addressed with improved data redaction.

— Apple

Credit

Ron Masas(BreakPoint), Pinak Oza, an anonymous researcher, Gergely Kalman@@gergely_kalman, Hikerell (Loadshine Lab), Zhongcheng Li(IES Red Team of ByteDance), Hossein Lotfi@@hosselot(Trend Micro Zero Day Initiative), iisBuri, Apple, Cristian Dinca (icmd.tech), Dave G.(supernetworks), Alex Radocea(supernetworks), Taavi Eomäe(Zone Media), Romain Lebesle(Khatima), Himanshu Bharti@@Xpl0itme(Khatima), Dalibor Milanovic, @@RenwaX23, Stanislav Jelezoglo, Aleksejs Popovs, Phil Beauvoir, Google Big Sleep, Nan Wang@@eternalsakura13, rheza@@ginggilBesel(Trend Micro Zero Day Initiative), shandikri(Trend Micro Zero Day Initiative), Gary Kwong(Trend Micro Zero Day Initiative), Justin Cohen(Google), Tom Van Goethem, Duy Trần@@khanhduytran0, Dennis Briner, Minghao Lin@@Y1nKoc, Lyutoon@@Lyutoon_, YingQi Shi@@Mas0n, Michael DePlante@@izobashi(Trend Micro Zero Day Initiative), BynarIO AI (bynar.io), Kirin@@Pwnrin, Joshua Thomas, rheza@@ginggilBesel, Lehan Dilusha Jayasinghe, 이동하 (Lee Dong Ha(BoB 14th), JZ, pattern-f@@pattern_F_, Gary Kwong, Wojciech Regula(SecuRing), Kirin@@Pwnrin(Fudan University), LFY@@secsys(Fudan University), Lukaah Marlowe, Rosyna Keller(Totally Not Malicious Software), Google Threat Analysis Group, Asaf Cohen, KPC(Cisco Talos), Isaiah Wan, Will Caine, Thomas Salomon, Sufiyan Gouri (TU Darmstadt), Phil Scott & Richard Hyunho Im (@richeeta)@@MrPeriPeri, Mark Bowers, Joey Hewitt, Dylan Rollins, Arthur Baudoin, Andr.Ess, Mikael Kinnman, Mickey Jin@@patch1t, Joseph Ravichandran@@0xjprx(MIT CSAIL), Dave G. (supernetworks.org), Csaba Fitzl@@theevilbit(Kandji), wac(Trend Micro Zero Day Initiative), Adwiteeya Agrawal, Kenneth Chew, Rodolphe Brunetti@@eisw0lf(Lupus Nova), Rodolphe BRUNETTI@@eisw0lf(Lupus Nova), @@EthanArbuckle, Ferdous Saljooki@@malwarezoo(Jamf), Murray Mike, Doug Hogan, CVE-2024-43398, CVE-2024-49761, CVE-2025-6442, Zhongquan Li@@Guluisacat, Ryan Dowd@@_rdowd, Vivek Dhar, ASI (RM) in Border Security Force, FTR HQ BSF Kashmir, Nikolai Skliarenko(Trend Micro Zero Day Initiative), an anonymous researcher(Microsoft), Kirin@@Pwnrin(Microsoft), Jonathan Bar Or@@yo_yo_yo_jbo(Microsoft), Amy@@asentientbot, CVE-2025-32462, CVE-2025-53906, Wang Yu(Cyberserval), @@cloudlldb, Morris Richman@@morrisinlife

Affected Software

13 affected componentsFixes available
Apple WatchOS<26.1
26.1
Apple visionOS<26.1
26.1
Apple macOS Tahoe<26.1
26.1
Apple iOS<26.1
26.1
Apple iPadOS<26.1
26.1
Apple Safari<26.1
26.1
Apple Safari<26.1
Apple iPadOS<26.1
Apple iPhone OS<26.1
Apple visionOS<26.1
Apple WatchOS<26.1
Apple iOS<18.7.2
18.7.2
Apple iPadOS<18.7.2
18.7.2

Event History

Nov 3, 2025
Data Sourced
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
DescriptionWeakness
Updated
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
Affected Software
Nov 4, 2025
CVE Published
via MITRE·01:16 AM
Data Sourced
via MITRE·01:16 AM
DescriptionWeakness
Data Sourced
via NVD·02:15 AM
DescriptionSeverityWeaknessAffected Software
Nov 5, 2025
Updated
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
Affected Software
Nov 21, 2025
Data Sourced
via Red Hat·12:50 PM
DescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

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Frequently Asked Questions

1

What is the severity of CVE-2025-43434?

CVE-2025-43434 is classified as a high severity vulnerability due to its potential to crash Safari when processing malicious web content.

2

How do I fix CVE-2025-43434?

To fix CVE-2025-43434, update your devices to watchOS 26.1, iOS 26.1, iPadOS 26.1, Safari 26.1, or visionOS 26.1.

3

What kind of issue is CVE-2025-43434?

CVE-2025-43434 is a use-after-free memory management issue that can lead to an unexpected crash.

4

Which Apple products are affected by CVE-2025-43434?

CVE-2025-43434 affects Apple WatchOS, iOS, iPadOS, visionOS, macOS Tahoe, and Safari, all prior to version 26.1.

5

What can happen if I do not address CVE-2025-43434?

If CVE-2025-43434 is not addressed, users may experience frequent crashes in Safari when interacting with maliciously crafted web content.

Company

Resources

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