CVE-2026-86977: Buffer Overflow

Published Sep 14, 2026
·
Updated

Accelerate Framework. An out-of-bounds write issue was addressed with improved bounds checking.

Other sources

Accessibility. A privacy issue was addressed with improved handling of user preferences.

— Apple

Accessibility. This issue was addressed with improved data protection.

— Apple

Accounts. An authorization issue was addressed with improved state management.

— Apple

An authorization issue was addressed with improved network restrictions. This issue is fixed in iOS 27 and iPadOS 27. An app may be able to initiate calls or send messages.

— MITRE

APFS. An out-of-bounds write issue was addressed with improved bounds checking.

— Apple

Credit

Abodi Dawoud, tamdao, Franco Belman at Blackwing Intelligence, Richard Zana, Meta Red Team X - Nik Tsytsarkin, Alexandre Borges, Ilya Andr (andrd3v), Zhongcheng Li(IES Red Team), Calif.io in collaboration with Claude, Anthropic Research, Peter Malone, Ruslan Dautov, Ye Zhang@@VAR10CK(Baidu Security), Tuan D. Hoang, Hazem Issa, Yongdae Kim @ KAIST SysSec Lab, Yongdae Kim @ SysSec, KAIST, Beomseok Oh@@KAIST, Yongdae Kim@@KAIST, CVE-2026-65414, an anonymous researcher, jioundai, Sindre Sorhus(Positive Technologies), Ilya Andr (andrd3v)(Positive Technologies), Asaf Cohen, Stanislav Jelezoglo, Heiner Gerdes, Rishabh Jain (rjcyber)(cyberplanet), Pasquale Scola, Mathis Mansière, Nik Tsytsarkin, Chris Bailey - Short Circuit, Siyeong kim, Meta Product Security, AL Najafi, Stuart Wallace, Pavan Nallamothu, ret2happy, Mustafa Calap@@ordinal0, dbg.re), stratan@@5tratan, Rahul Raj, N.M.Praveen Nawarathne@@zblockrat, James Gill @infosec.exchange)@@jjtech, Tommy DeVoss@@thedawgyg(Braze Security Team), flower xu, Adriatik Raci, PETOWORKS의 Bugeun Choi@@Bugeun, Daisuke Hatakeyama, Ryohei Ueki Research)@@SYZD, Hyunwoo Kim@@v4bel, Junyeong Lee (jylab.github.io), Merrick Hare, Aditya Kumar, John Nzyuko Uvyu, Narendra Singh@@_3P1C, Geoffrey Lovelace, Bruce Dang(Calif), Jiyong Yang, Vishal Patidar, Roman Zabicki, Luke Symons, Justin O'Leary@@olearysec(olearysec), Mateusz Jurczyk(Google Project Zero), Varik Matevosyan, Mihalis Haatainen, Ashish Kunwar, Ari Hawking, 이재영, David Strnadel, Seiji Sakurai@@HeapSmasher, Csaba Fitzl@@theevilbit(Iru), genter0(Calif), Svetoslav Stolarov(Calif), Josh Maine(Calif), Dun, Bernhard Jackiewicz, Billy Jheng Bing Jhong(STAR Labs SG Pte), Pan Zhenpeng@@Peterpan0927(STAR Labs SG Pte), Ryan Hileman via Xint Code (xint.io), Bhaswanth Chigurupati, Tristan Madani@@TristanInSec(Talence Security), Hiroki Imai (LAC Co., Ltd.), Andreas Jaegersberger & Ro Achterberg(Nosebeard Labs), R4mbb(KRsecurity), Vladislav Shevchenko (Positive Technologies), Fábio Luís@@scanpt(STAR Labs SG Pte), Richard Zana(STAR Labs SG Pte), OpenAI, Hüseyin Kabasakal@@HuseyinK01, Kitten Food, Sindre Sorhus, Morris Richman@@morrisinlife, Tristan Brennan, Myeonghun Pak, Nathaniel Oh@@calysteon, Alan Banderas@@creeper4004, Matthew Zamat, Rodolphe Brunetti@@eisw0lf(Lupus Nova), Drin Raci(sentry), Yiğit Can YILMAZ@@yilmazcanyigit, Claudio Bozzato(Cisco Talos), Francesco Benvenuto(Cisco Talos), Hoffcona(IES Red Team), Hongsik Kim (mnur), Bálint Magyar (balintmagyar.com), Issa Sancho, CJ Vana, Gongyu Ma@@Mezone0, Dhiyanesh Selvaraj@@redroot97, Surya Narayan Kushwaha, John Lussier, Filip Olszak, Meshaal@@unrealmesh, Abodi Dawoud(van Dijk), Merrick Hare(van Dijk), Roel(van Dijk), Owen Pawling@@owenpawling, Gongyu Ma (twitter@@Mezone0, Jonghoon Han (Aegis)(Shuffle Team), bubu(Shuffle Team), 이재영(Shuffle Team), Tae Woo Kim(Shuffle Team), Dawuge(Shuffle Team), Abhay Kailasia@@abhay_kailasia(Safran Mumbai India), YingMuo@@YingMuo(DEVCORE Research Team), Armend Gashi, Ujjwal Reddy Kalvolu Sreenivasa Reddy, Johan Wahyudi, Lehan Dilusha Jayasingha, Jérôme Djouder, Seung Je Seong(Positive Technologies), Jakob Pammer, Kirin@@Pwnrin, Constantin Clerc(Calif), Shad J(Calif), huami1314@@huamidev(Calif), Huy Nguyen@@34306(Calif), Zeyang Li&Yuxiang Wang(Chongqing Telecom), Bedran Karakoc(Ruhr University Bochum), Tobias Funke(Ruhr University Bochum), Jacopo Clark(Ruhr University Bochum), Katharina Kohls(Ruhr University Bochum), Aaron Schlitt@@aaron_sfn(Hasso Plattner Institute), Cybersecurity - Mobile & Wireless, Jacob Prezant (prezant.us), Souta Sugiyama, Viggo Lekdorf, Tomi Garcia (archyxsec), Kwak Kiyong / kakaogames, Niels Hofmans, OGINOME Tomohito, Yusuf Kelany, Jian Lee@@speedyfriend433, He Wei (ギカク), Eddy Tsalolikhin, Johann Rehberger, Musaab Khan@@bxff(Tencent Xuanwu Lab), XlabAI Team(Tencent Xuanwu Lab), Atuin Automated Vulnerability Discovery Engine, Guannan Wang, Zhanpeng Liu, Jiashuo Liang, Guancheng Li, Iain Harkiss, Daniel Febrero, Wang Yu, CVE-2019-5598, Piotr Jerzy Duszynski(MurphySec), f0r(MurphySec), ธนกฤต ทัฬหะ, Gergely Kalman@@gergely_kalman, Arni Hardarson (Neonix Security), Jagannath Mohanty, Mohamad Dawoud, Efstratios Kaplanellis@@5tratan(Almamater Technologies), Stuart Wallace(Totally Not Malicious Software), Ilya Andr (andrd3v)(Totally Not Malicious Software), Rosyna Keller(Totally Not Malicious Software), Arni Hardarson (Neonix Security)(Appknox), Vinay Kumar Rasala (Xplo8E)(Appknox), Cem Onat Karagun, Zhongcheng Li (CK01), Dem0ns (@天府简易信工作室), Abdelhak Kherroubi, Jasminder Pal Singh, Lehan Dilusha Jayasingha (Sri Lanka), S. Rosario, Jihwan Yoon, Duc Anh Nguyen & Ta Duc Thien, Ryohei Ueki Research)@@SYZD

Affected Software

6 affected componentsFixes available
Apple iOS<27
Apple iPadOS<27
Apple iOS<27
27
Apple iPadOS<27
27
Apple iPadOS<27.0
Apple iPhone OS<27.0

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 27
  2. Upgrade

    Upgrade iOS to a version that resolves this vulnerability.

    Fixed in 27
  3. Upgrade

    Upgrade iPadOS to a version that resolves this vulnerability.

    Fixed in 27

Event History

Sep 14, 2026
Data Sourced
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Oct 20, 2026
CVE Published
via MITRE·12:50 AM
Data Sourced
via MITRE·12:50 AM
DescriptionWeakness
Data Sourced
via NVD·01:17 AM
DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What conditions are required for exploitation?

An app must be able to run on the affected device. The issue could allow that app to initiate calls or send messages.

2

Which devices or software versions are affected?

The provided information identifies iOS and iPadOS as affected and states that the issue is fixed in iOS 27 and iPadOS 27. It does not specify the vulnerable version range.

3

What is the mitigation if updating is not immediately possible?

No temporary mitigation is provided. The stated remediation is to update to iOS 27 or iPadOS 27.

Company

Resources

Contact

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