CVE-2026-20661: Use After Free

Q: What is the severity of CVE-2026-20661?

CVE-2026-20661 addresses privacy issues along with inconsistencies in user interface and authorization mechanisms.

Q: How do I fix CVE-2026-20661?

To fix CVE-2026-20661, update your device to iOS version 26.3 or 18.7.5, or iPadOS version 26.3 or 18.7.5.

Q: Which devices are affected by CVE-2026-20661?

CVE-2026-20661 affects Apple iOS and iPadOS devices running versions prior to 26.3 and 18.7.5.

Q: What types of issues does CVE-2026-20661 address?

CVE-2026-20661 addresses privacy concerns, inconsistent user interfaces, and authorization issues.

Q: Is my Apple device vulnerable to CVE-2026-20661?

If your device is running an affected version of iOS or iPadOS prior to the fixes, it is vulnerable to CVE-2026-20661.

Published Feb 11, 2026

Updated

Accessibility. A privacy issue was addressed by removing sensitive data.

Other sources

Accessibility. An inconsistent user interface issue was addressed with improved state management.

— Apple

An authorization issue was addressed with improved state management. This issue is fixed in iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3. An attacker with physical access to a locked device may be able to view sensitive user information.

— MITRE

AppleKeyStore. A use after free issue was addressed with improved memory management.

— Apple

Bluetooth. A denial-of-service issue was addressed with improved validation.

— Apple

Books. A path handling issue was addressed with improved validation.

— Apple

Credit

Wong Wee Xiang, Loh Boon Keat, Jacob Prezant (prezant.us), Johnny Franks (zeroxjf), an anonymous researcher, jioundai, Nils Hanff @chaos.social)@@nils1729(Hasso Plattner Institute), Amy (amys.website), Atul Kishor Jaiswal, Anonymous(Trend Micro Zero Day Initiative), Yiğit Can YILMAZ@@yilmazcanyigit, Golden Helm Securities(Iru), Gergely Kalman@@gergely_kalman(Iru), Csaba Fitzl@@theevilbit(Iru), Gergely Kalman@@gergely_kalman, Google Threat Analysis Group, Kirin@@Pwnrin, Asaf Cohen, George Karchemsky@@gkarchemsky(Trend Micro Zero Day Initiative), Jian Lee@@speedyfriend433, Keisuke Hosoda, Xin'an Zhou, Juefei Pu, Zhutian Liu, Zhiyun Qian, Zhaowei Tan, Srikanth V. Krishnamurthy, Mathy Vanhoef, Zhongcheng Li(IES Red Team), CVE-2025-59375, Richard Hyunho Im at Route Zero Security (routezero.security)@@richeeta, Ron Masas(BreakPoint), Rodolphe Brunetti@@eisw0lf(Lupus Nova), Dalibor Milanovic, Noah Gregory (wts.dev), Óscar García Pérez, Stanislav Jelezoglo, Viktor Lord Härringtón, Enis Maholli (enismaholli.com), Gongyu Ma@@Mezone0, LeminLimez, Nathaniel Oh@@calysteon, HanQing(TSDubhe), Nan Wang@@eternalsakura13, Tom Van Goethem, EntryHi, Wang Yu(Cyberserval), piffz, Daniel Nurkin, Al Sadman Awal, Mohamed Hamdadou & Mahran Alhazmi, Hichem Maloufi, Christian Mina, Gerson Aldaz, qwerty j0y & Ricardo Garcia, Dorian Del Valle, Michael DePlante@@izobashi(Trend Micro Zero Day Initiative), Mickey Jin@@patch1t, @@cloudlldb

Affected Software

8 affected componentsFixes available

Apple iOS<26.3

26.3

Apple iPadOS<26.3

26.3

Apple iOS<18.7.5

18.7.5

Apple iPadOS<18.7.5

18.7.5

Apple iPadOS<18.7.5

Apple iPadOS>=26.0<26.3

Apple iPhone OS<18.7.5

Apple iPhone OS>=26.0<26.3

Event History

Feb 11, 2026

Data Sourced

via Apple·12:00 AM

DescriptionWeaknessAffected Software

Updated

via Apple·12:00 AM

Description

Updated

via Apple·12:00 AM

DescriptionWeakness

Updated

via Apple·12:00 AM

Affected Software

Updated

via Apple·12:00 AM

DescriptionWeaknessAffected Software

Updated

via Apple·12:00 AM

DescriptionAffected Software

CVE Published

via MITRE·10:58 PM

Data Sourced

via MITRE·10:58 PM

DescriptionWeakness

Data Sourced

via NVD·11:16 PM

DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

What is the severity of CVE-2026-20661?

CVE-2026-20661 addresses privacy issues along with inconsistencies in user interface and authorization mechanisms.

How do I fix CVE-2026-20661?

To fix CVE-2026-20661, update your device to iOS version 26.3 or 18.7.5, or iPadOS version 26.3 or 18.7.5.

Which devices are affected by CVE-2026-20661?

CVE-2026-20661 affects Apple iOS and iPadOS devices running versions prior to 26.3 and 18.7.5.

What types of issues does CVE-2026-20661 address?

CVE-2026-20661 addresses privacy concerns, inconsistent user interfaces, and authorization issues.

Is my Apple device vulnerable to CVE-2026-20661?

If your device is running an affected version of iOS or iPadOS prior to the fixes, it is vulnerable to CVE-2026-20661.

CVE-2026-20661: Use After Free

Other sources

Credit

Affected Software

Event History

Parent advisories

Peer vulnerabilities

Don't miss critical vulnerabilities

Frequently Asked Questions

What is the severity of CVE-2026-20661?

How do I fix CVE-2026-20661?

Which devices are affected by CVE-2026-20661?

What types of issues does CVE-2026-20661 address?

Is my Apple device vulnerable to CVE-2026-20661?

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