CVE-2026-43743: Race Condition

Published Jun 29, 2026
·
Updated

A race condition was addressed with improved state handling. This issue is fixed in iOS 26.5.2 and iPadOS 26.5.2, iOS 26.7 and iPadOS 26.7, macOS Tahoe 26.5.2, macOS Tahoe 26.7, tvOS 26.6, watchOS 26.6. An app may be able to cause unexpected system termination.

Other sources

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

— Apple

Accessibility. This issue was addressed with improved data protection.

— Apple

Accounts Framework. This issue was addressed with improved data protection.

— Apple

APFS. A permissions issue was addressed with improved path validation.

— Apple

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

— Apple

Credit

Lyutoon, Dun, impost0r (ret2plt), Hyunwoo Kim@@v4bel, Feng Xue(ThreatBook), XGPT(ThreatBook), Vladislav Shevchenko (Positive Technologies)(Baidu Security), Ye Zhang@@VAR10CK(Baidu Security), Billy Jheng Bing Jhong(STAR Labs SG Pte), Pan Zhenpeng@@Peterpan0927(STAR Labs SG Pte), Tristan Madani@@TristanInSec(Talence Security), dr3dd, Vitaly Simonovich, Christian Meurer Xavier, Gurpreet Shergill, Merrick Hare, Drinor Selmanaj (Sentry), Khai Tran, John Lussier, Rhyru9, Kwak Kiyong, Song Nuri, Jonathan Alush-Aben, stratan@@5tratan(Almamater Technologies), Josef Korbel (Citadelo)(Talence Security), Gia Bui@@yabeow(Calif), Narendra Singh@@_3P1C, CVE-2026-43709, Tommy DeVoss@@thedawgyg(Braze Security Team), Юлия Мерцалова, Nan Wang@@eternalsakura13, Milad Nasr, Nicholas Carlini with Claude, Anthropic, Luke Francis, Soyeon Park(DEVCORE Research Team), Amy Burnett(DEVCORE Research Team), Khai Tran(DEVCORE Research Team), sherkito(DEVCORE Research Team), Kota Toda(DEVCORE Research Team), HexRabbit@@h3xr4bb1t(DEVCORE Research Team), NiNi@@terrynini38514(DEVCORE Research Team), Using GLM(Z), Brian Carpenter, Utkarsh Pal, Ignacio Sanmillan@@ulexec, Kwak Kiyong(Talence Security), Song Nuri(Talence Security), Maher Azzouzi(Calif), Tuan(Calif), Duc(Calif), OpenAI Codex Security - Amy Burnett, Evan Lambert, Mateusz Krzywicki (iVerify.io)(Braze Security Team), dr3dd(Braze Security Team), Nathaniel Oh@@calysteon, Arni Hardarson, Jody Ritonga, Behzad Najjarpour Jabbari@@_G4ru_, Aaron Grattafiori - NVIDIA AI Red Team, Josef Korbel, Idan Masas, CVE-2026-28979, Peter Malone, Stuart Wallace(Totally Not Malicious Software), Rosyna Keller(Totally Not Malicious Software), Jian Lee@@speedyfriend433, Ilya Andr (andrd3v), Gongyu Ma@@Mezone0, David Strnadel, Daniel Febrero, CJ Vana, Asaf Cohen, Cem Onat Karagun, an anonymous researcher, tamdao, Franco Belman at Blackwing Intelligence, Richard Zana, Zhongcheng Li(IES Red Team), Calif.io in collaboration with Claude, Anthropic Research, Ruslan Dautov, CVE-2026-65414, Rishabh Jain (rjcyber)(cyberplanet), Pasquale Scola, Siyeong kim, Chris Bailey - Short Circuit, AL Najafi, Stuart Wallace, Pavan Nallamothu, N.M.Praveen Nawarathne@@zblockrat, James Gill @infosec.exchange)@@jjtech, flower xu, Adriatik Raci, PETOWORKS의 Bugeun Choi@@Bugeun, Daisuke Hatakeyama, Ryohei Ueki Research)@@SYZD, Meta Red Team X - Nik Tsytsarkin, Geoffrey Lovelace, Bruce Dang(Calif), Jiyong Yang, Justin O'Leary, 진규정 (Gyujeong Jin, @@G1uN4sh, Gandalf4a(PKU), Anton Pakhunov, Niels Hofmans, Meta Red Team X, Geonha Lee@@leegn4a, Mateusz Jurczyk(Google Project Zero), Varik Matevosyan, Bernhard Jackiewicz, Svetoslav Stolarov & Aisa Fox(Calif), Josh Maine(Calif), genter0, Andreas Jaegersberger & Ro Achterberg(Nosebeard Labs), R4mbb(KRsecurity), Vladislav Shevchenko (Positive Technologies), Hiroki Imai (LAC Co., Ltd.), Fábio Luís@@scanpt(STAR Labs SG Pte), Richard Zana(STAR Labs SG Pte), Bhaswanth Chigurupati, Kitten Food, Matthew Zamat, Rodolphe Brunetti@@eisw0lf(Lupus Nova), Drin Raci(sentry), Yiğit Can YILMAZ@@yilmazcanyigit, Stanislav Jelezoglo, Sindre Sorhus(IES Red Team), Hoffcona(IES Red Team), Hongsik Kim (mnur), stratan@@5tratan, Rahul Raj, Dhiyanesh Selvaraj@@redroot97, Surya Narayan Kushwaha, Roman Zabicki, Filip Olszak, Abhay Kailasia@@abhay_kailasia(Safran Mumbai India), Abodi Dawoud, Ujjwal Reddy Kalvolu Sreenivasa Reddy, Johan Wahyudi, Armend Gashi, Lehan Dilusha Jayasingha, 이재영(Positive Technologies), Seung Je Seong(Positive Technologies), Jakob Pammer(Positive Technologies), Ilya Andr (andrd3v)(Positive Technologies), Jérôme Djouder, Sindre Sorhus, Constantin Clerc(Calif), Shad J(Calif), Huy Nguyen@@34306(Calif), huami1314@@huamidev, OGINOME Tomohito, Zhongcheng Li (CK01), Lehan Dilusha Jayasingha (Sri Lanka), Jasminder Pal Singh, Dem0ns (@天府简易信工作室), Abdelhak Kherroubi, Mickey Jin@@patch1t, Jared Reyes, D4rthL, Mohamad Dawoud / Abodi Dawoud, Ahmed Alwardani, Mr.Gedik@@h4ck2s3c(Turkish Technology), Mr.Gedik@@h4ck2s3c, Oren Yomtov, Morris Richman@@morrisinlife, Kun Peeks@@SwayZGl1tZyyy, Sanny Mitra(Cystack), Sihyun Roh (Compsec(Cystack), SNU)(Cystack), ngockhanh(Cystack), 정우 하@@0xfa11babe, Suresh Sundaram, Surej Sekhar, Hari Shanmugam (The Hxr1), Ataberk Yavuzer, Dawuge(Shuffle Team), 이재영, Kraken Cryptocurrency Exchange(Nosebeard Labs), Ryan Hughes, Kujtim Kryeziu (Sentry), Mustafa Calap@@ordinal0, dbg.re), Yongyue WANG AKA Brian.W(OKX security), Omar Cerrito, Meshaal @ Darkcov, Joseph Shamoon, 章鱼哥 （aipyaipy.com）@@aipy, instantraaamen (github.com/instantraaamen) Contact: masa.shiramizu.com@@gmail, 章鱼哥 (aipyaipy.com）@@aipy, Manish Bhatt(Nosebeard Labs), Amazon Leo Security(Nosebeard Labs), Nathaniel Oh@@calysteon(Nosebeard Labs), Junyeong Lee (jylab.github.io), John Nzyuko Uvyu, Aditya Kumar, Luke Symons, Arni Hardarson (Neonix Security)(Talence Security), 정우 하, Aswin Kumar Gokulakannan, Jonathan Bar Or@@yo_yo_yo_jbo(ThreatBook), Alfredo Pesoli@@__rev(Bynar), Mihalis Haatainen, Ashish Kunwar, Ari Hawking, James Duffy@@0x4A616D657344, Eddy Tsalolikhin, Abhijeet Singh (www.linkedin.com/in/abhiunix/), Stuart Thomas, Mohamed Wedatalla, Arjanit Isufi, HvxyZLF, Adrián Díaz Aguilar, Dave G.(supernetworks), Alex Radocea(supernetworks), Claudio Bozzato(Cisco Talos), Francesco Benvenuto(Cisco Talos), Kenneth Chew, Dora Orak, Arbuckle@@Ethan, @@leptos_null, wdszzml, Atuin Automated Vulnerability Discovery Engine, Alfredo Pesoli via Bynario Atlas (bynar.io)@@__rev, Jaeho Nam(SNU CSE MMLAB), Jungbum Lee(SNU CSE MMLAB), Sangwi Kang(SNU CSE MMLAB), Hyeonguk Ko(SNU CSE MMLAB), Taekyoung Kwon(SNU CSE MMLAB), Jakob Pammer(Calif), 재영 정(Calif), 재영 정(ThreatBook), Peter Malone(ThreatBook), Jay Patel, 재영 정, Dave G., YingMuo@@YingMuo(DEVCORE Research Team), Rodolphe BRUNETTI@@eisw0lf(Lupus Nova), 糖豆爸爸(@晴天组织), Robert Mindo, Amy (amys.website), Meridian Miftari, Zeyang Li&Yuxiang Wang(Chongqing Telecom), Tomi (tk0) Koski@@tomikoski, bubu(Calif), Surya Narayan Kushwaha(Calif), Roman Zabicki(Calif), Richard Zana(Calif), Omar Cerrito(Calif), HE WEI（ギカク）(Calif), Chris Bailey - Short Circuit(Calif), He Wei（ギカク)(Calif), Seonung Park, ALTV!ST (altvi.st/), Daniel Williams, Anonymous(TrendAI Zero Day Initiative), ret2happy, Mathis Mansière, Rajdip Dey Sarkar, Arni Hardarson (Neonix Security), CVE-2026-3784, CVE-2026-3783, Huỳnh Tấn Ngàn, Redon Gashi, Michael DePlante@@izobashi(TrendAI Zero Day Initiative), Ashish Kunwar(MurphySec), f0r(MurphySec), Mahmoud Abdelmoniem, Wang Yu, DARKNAVY@@DarkNavyOrg, Fábio Luís@@scanpt, Nicolas Rabrenovic, Pasquale Scola(STAR Labs SG Pte), Gor Aleksanyan, impost0r (ret2plt)(Appknox), Ruslan Dautov(Appknox), Aleksandr Tarasikov(Appknox), jay(Appknox), Dhiyanesh Selvaraj@@redroot97(Appknox), Vinay Kumar Rasala (Xplo8E)(Appknox), Lyutoon(STAR Labs SG Pte), DongJun Kim (smlijun) with UIUC(STAR Labs SG Pte), Hwiwon Lee (hwiwonl) with UIUC(STAR Labs SG Pte), Jongseong Kim (nevul37) with UIUC(STAR Labs SG Pte), Younggi Park (grill66) with UIUC(STAR Labs SG Pte), Peter Malone(STAR Labs SG Pte), an anonymous researcher(STAR Labs SG Pte), Hari Shanmugam (The Hxr1)(STAR Labs SG Pte), Marco Grassi, Daniele Castronovo, Michal Kosiorek, Ruslan Dautov(Baidu Security), 재영 정(Baidu Security), (Rao Ali Nawaz)@@rootxran(Baidu Security), Chanwit Muenprakoddee (ChemIndy)(Baidu Security), an anonymous researcher(Baidu Security), Franco Belman at Blackwing Intelligence(Calif), Christian Figueroa(Calif), Johnny Franks@@0xjohnny(Calif), Ashmit Sharma & Atul RV(Calif), Peter Malone(Calif), Muhamad Syaiful(Calif), Muneeb Amin Bhat(Calif), Dhiyanesh Selvaraj@@redroot97(Calif), Ali Marzouq(Calif), Bountyy Oy - Mihalis Haatainen(Calif), beist(ASU SEFCOM), Adam Doupé(ASU SEFCOM), Dun(STAR Labs SG Pte), Johnny Franks@@0xjohnny, Somair Ansar(Calif), Asjid Kalam@@odinshell, Abhijeet Singh (linkedin.com/in/abhiunix/), Ryan Hileman via Xint Code (xint.io), Jian Zhou, Ye Zhang, Lukas Gerlach, Tristan Rousseau, Dun(DARKNAVY), deepsec@@DarkNavyOrg(DARKNAVY), Daisuke Hatakeyama Research)@@SYZD, Richard Zana(Nosebeard Labs), 彦辰, Nik Tsytsarkin, Utkarsh Pal(Almamater Technologies), Kagami Rosylight(Mozilla), Luke Francis(Z), Francisco Alonso@@revskills(Z), Shubham Chaskar(Z), Jiyong Yang@@Sy2n0(Z), 杉山 壮太(Z), lattice(Z), Behzad Najjarpour Jabbari@@_G4ru_(Z), Junyeong Lee(Z), Mooth.ai(Z), OGINOME Tomohito(Z), Song nuri(Talence Security), Muhamad Syaiful, Shaheen Fazim, Manuel Fernandez (Stackhopper Security), wh0am1i, Francisco Knabe, Tien-Chih Lin(CyCraft Technology)

Affected Software

11 affected componentsFixes available
Apple WatchOS<26.6
26.6
Apple tvOS<26.6
26.6
Apple macOS Tahoe<26.5.2
26.5.2
Apple iOS<26.5.2
26.5.2
Apple iPadOS<26.5.2
26.5.2
Apple iOS<26.7
26.7
Apple iPadOS<26.7
26.7
Apple macOS Tahoe<26.7
26.7
Apple iPadOS<26.5.2
Apple iPhone OS<26.5.2
Apple macOS>=26.0<26.5.2

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 26.6
  2. Upgrade

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

    Fixed in 26.5.2
  3. Upgrade

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

    Fixed in 26.7

Event History

Jun 29, 2026
Data Sourced
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
Affected Software
CVE Published
via MITRE·07:42 PM
Data Sourced
via MITRE·07:42 PM
DescriptionWeakness
Data Sourced
via NVD·08:17 PM
DescriptionSeverityWeaknessAffected Software
Jul 27, 2026
Updated
via Apple·12:00 AM
DescriptionAffected Software
Updated
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
Affected Software
Sep 14, 2026
Updated
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
DescriptionAffected Software
Updated
via Apple·12:00 AM
Affected 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-2026-43743?

CVE-2026-43743 has a medium severity rating of 4.7 according to the CVSS 3.1 metrics.

2

How do I fix CVE-2026-43743?

To fix CVE-2026-43743, update your devices to iOS 26.5.2, iPadOS 26.5.2, or macOS Tahoe 26.5.2.

3

What type of vulnerability is CVE-2026-43743?

CVE-2026-43743 is categorized as a race condition error.

4

What impact does CVE-2026-43743 have on affected systems?

CVE-2026-43743 may allow an app to cause unexpected system termination.

5

Which software versions are affected by CVE-2026-43743?

CVE-2026-43743 affects Apple iPadOS, iOS, and macOS Tahoe prior to version 26.5.2.

Company

Resources

Contact

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