CVE-2026-20663: Use After Free

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

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

Call History. A logic issue was addressed with improved checks.

— Apple

Credit

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

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

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 18.7.5
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 26.3
  3. Upgrade

    Upgrade iOS and iPadOS to a version that resolves this vulnerability.

    Fixed in 18.7.5
  4. Upgrade

    Upgrade iOS and iPadOS to a version that resolves this vulnerability.

    Fixed in 26.3

Event History

Feb 11, 2026
Data Sourced
via Apple·12:00 AM
DescriptionWeaknessAffected 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

1

What is the severity of CVE-2026-20663?

The severity of CVE-2026-20663 is categorized as a moderate vulnerability due to the potential for privacy issues and denial-of-service impacts.

2

How do I fix CVE-2026-20663?

To fix CVE-2026-20663, update your iOS or iPadOS device to version 26.3 or 18.7.5 as recommended by Apple.

3

What issues does CVE-2026-20663 address?

CVE-2026-20663 addresses privacy issues, inconsistent user interface problems, and a denial-of-service vulnerability in Bluetooth functionality.

4

Which versions of software are affected by CVE-2026-20663?

CVE-2026-20663 affects Apple iOS and iPadOS versions prior to 26.3 and below 18.7.5.

5

Is there a risk of denial-of-service attacks with CVE-2026-20663?

Yes, CVE-2026-20663 includes a denial-of-service issue that could affect Bluetooth connectivity without proper validation.

Company

Resources

Contact

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