CVE-2026-43811: Buffer Overflow

Published Jul 27, 2026
·
Updated

A race condition was addressed with improved checks. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6 and iPadOS 26.6. An app may be able to modify protected parts of the file system.

Other sources

Accessibility. This issue was addressed through improved state management.

— Apple

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

— Apple

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

— Apple

AirDrop. A reachable assertion was addressed with improved input validation.

— Apple

APFS. The issue was addressed with improved memory handling.

— Apple

Credit

Arash Ale Ebrahim(SCy), Narendra Singh@@_3P1C, Peter Malone, Rahul Raj, Peter Malone(cyberplanet), Nicolas Rabrenovic(cyberplanet), Irvin Wang(cyberplanet), Rishabh Jain (rjcyber)(cyberplanet), Seonung Park, ALTV!ST (altvi.st/), Xint Code, Franco Belman at Blackwing Intelligence, Dun, YingQi Shi@@Mas0nShi(DBAppSecurity's WeBin lab), Rodolphe Brunetti@@eisw0lf(Lupus Nova), Daniel Febrero, Daniel Williams, Arni Hardarson (Neonix Security), Anonymous(TrendAI Zero Day Initiative), ret2happy, Mathis Mansière, an anonymous researcher, James Duffy@@0x4A616D657344, stratan@@5tratan, CVE-2026-3784, CVE-2026-3783, Huỳnh Tấn Ngàn, Manuel Fernandez (Stackhopper Security), Stanislav Jelezoglo(Positive Technologies), Ilya Andr (andrd3v)(Positive Technologies), Redon Gashi, Jonathan Alush-Aben, Arni Hardarson, Jiri Ha, Gandalf4a(PKU), Anton Pakhunov, Geonha Lee@@leegn4a, Richard Zana, Dhiyanesh Selvaraj@@redroot97, Seiji Sakurai@@HeapSmasher, hxr1(STAR Labs SG Pte), Hiroki Imai (LAC Co.(STAR Labs SG Pte), Ltd.)(STAR Labs SG Pte), Billy Jheng Bing Jhong(STAR Labs SG Pte), Pan Zhenpeng@@Peterpan0927(STAR Labs SG Pte), Ashish Kunwar, Ryan Hileman via Xint Code (xint.io), Ashish Kunwar(MurphySec), f0r(MurphySec), Mahmoud Abdelmoniem(ThreatBook), Feng Xue(ThreatBook), XGPT(ThreatBook), Wang Yu, Nicolas Rabrenovic, Lyutoon, Hiroki Imai (LAC Co., Ltd.), Fábio Luís@@scanpt, DARKNAVY@@DarkNavyOrg, Gor Aleksanyan, Michal Kosiorek, Eddy Tsalolikhin, Asjid Kalam@@odinshell, impost0r (ret2plt), Hyunwoo Kim@@v4bel, Hyunwoo Kim@@v4bel(ThreatBook), Lukas Gerlach, Wang Yu(STAR Labs SG Pte), Ernesto Martínez García, Calif Research, Ji'an Zhou, Mingxuan Yang, Ye Zhang, Ye Zhang@@VAR10CK(Baidu Security), Vladislav Shevchenko (Positive Technologies)(STAR Labs SG Pte), Pasquale Scola(STAR Labs SG Pte), CVE-2026-4424, Robert Mindo, Nathaniel Oh@@calysteon, Daisuke Hatakeyama Research)@@SYZD, Richard Zana(Nosebeard Labs), Andreas Jaegersberger & Ro Achterberg(Nosebeard Labs), Steven Zhao (zhao.io), Tristan Madani@@TristanInSec(Talence Security), Michael DePlante@@izobashi(TrendAI Zero Day Initiative), wh0am1i, Francisco Knabe, Nik Tsytsarkin, Stanislav Jelezoglo, Alex Radocea, Do Young Park, OpenAI Codex Security - Amy Burnett, wwwlk, Artem Dinaburg(Trail of Bits via Anthropic CVD), Cantina, dr3dd, Tommy DeVoss@@thedawgyg(Braze Security Team), Gurpreet Shergill(Calif), Gia Bui@@yabeow(Calif), Rhyru9, Merrick Hare, Kwak Kiyong, Song Nuri, Khai Tran, John Lussier, Gurpreet Shergill, Drinor Selmanaj (Sentry), Utkarsh Pal, Ignacio Sanmillan@@ulexec, Using GLM(Z), stratan@@5tratan(Almamater Technologies), 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), Brian Carpenter, Milad Nasr, Nicholas Carlini with Claude, Anthropic, Janggoon Lee(Out of Bounds), Mateusz Krzywicki (iVerify.io), Kun Peeks@@SwayZGl1tZyyy, Josef Korbel, Josef Korbel (Citadelo)(Cisco Talos), Claudio Bozzato(Cisco Talos), Francesco Benvenuto(Cisco Talos), Niels Hofmans, Thomas Guillem, Charles Kern, Shubham Chaskar, Seonwook Kim, lattice, Henock Habte, Hossein Lotfi@@hosselot(TrendAI Zero Day Initiative), Utkarsh Pal(Talence Security), Narendra Singh@@_3P1C(Calif), Josef Korbel (Citadelo)(Calif), Юлия Мерцалова, Dung Do@@_piers2(Calif), Luke Francis, Muhamad Syaiful, Behzad Najjarpour Jabbari@@_G4ru_, Vitaly Simonovich, Christian Meurer Xavier, Aaron Grattafiori - NVIDIA AI Red Team, 杉山 壮太, Josef Korbel(Calif), Mohit Negi, Nan Wang@@eternalsakura13, CVE-2026-28979, Shaheen Fazim, Stuart Wallace, 이재영(Appknox), Vinay Kumar Rasala (Xplo8E)(Appknox), Jorge Welch@@jorgwelch, Rosyna Keller(Totally Not Malicious Software), 章鱼哥.com@@aipyaipy, Chris Bailey - Short Circuit, N.M.Praveen Nawarathne@@zblockrat, Vladislav Shevchenko (Positive Technologies), tamdao, David Strnadel, Rodolphe BRUNETTI@@eisw0lf(Lupus Nova), Surya Kushwaha, Dave G., 진규정 (Gyujeong Jin, @@G1uN4sh, PETOWORKS의 Bugeun Choi@@Bugeun, 이재영, hxr1, Mahmoud Abdelmoniem, impost0r (ret2plt)(Appknox), Ruslan Dautov(Appknox), Aleksandr Tarasikov(Appknox), jay(Appknox), Dhiyanesh Selvaraj@@redroot97(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, Josh Maine(Calif), 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), Huy Nguyen@@34306(Calif), beist(ASU SEFCOM), Adam Doupé(ASU SEFCOM), Dun(STAR Labs SG Pte), Johnny Franks@@0xjohnny, Somair Ansar(Calif), Abhijeet Singh (linkedin.com/in/abhiunix/), Omar Cerrito, Jian Zhou, YingMuo@@YingMuo(DEVCORE Research Team), Tristan Rousseau, Dun(DARKNAVY), deepsec@@DarkNavyOrg(DARKNAVY), Koh M. Nakagawa@@tsunek0h(FFRI Security Inc), 彦辰, RedRays Security Team, Morris Richman@@morrisinlife, Asaf Cohen, Gongyu Ma@@Mezone0, 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), Heiko Kiesel(SEEMOO), TU Darmstadt, OGINOME Tomohito

Affected Software

6 affected componentsFixes available
Apple iOS<26.6
26.6
Apple iPadOS<26.6
26.6
Apple iOS<18.7.10
18.7.10
Apple iPadOS<18.7.10
18.7.10
Apple iPadOS<26.6
Apple iPhone OS<26.6

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 18.7.10
  2. Upgrade

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

    Fixed in 26.6
  3. Upgrade

    Upgrade iOS to a version that resolves this vulnerability.

    Fixed in 18.7.10
  4. Upgrade

    Upgrade iPadOS to a version that resolves this vulnerability.

    Fixed in 18.7.10
  5. Upgrade

    Upgrade iOS to a version that resolves this vulnerability.

    Fixed in 26.6
  6. Upgrade

    Upgrade iPadOS to a version that resolves this vulnerability.

    Fixed in 26.6
  7. Configuration

    Ensure the affected authorization/permissions logic is updated so an app cannot modify protected parts of the file system; this corresponds to the release note item about protecting file-system areas with improved validation/state management.

    File system permissions / protected areas authorization checks and state management (improved) = Implement improved validation/state management to prevent modification of protected parts of the file system

Event History

Jul 27, 2026
Data Sourced
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
DescriptionWeakness
CVE Published
via MITRE·08:12 PM
Data Sourced
via MITRE·08:12 PM
DescriptionWeakness
Data Sourced
via NVD·09:17 PM
DescriptionSeverityWeaknessAffected Software
Aug 17, 2026
Updated
via Apple·12:00 AM
DescriptionWeaknessAffected 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-2026-43811?

The severity of CVE-2026-43811 is medium with a CVSS score of 4.7.

2

How do I fix CVE-2026-43811?

To fix CVE-2026-43811, update to iOS 26.6 or iPadOS 26.6.

3

What does CVE-2026-43811 affect?

CVE-2026-43811 affects the Apple iPadOS and Apple iOS platforms.

4

What type of vulnerability is CVE-2026-43811?

CVE-2026-43811 involves a race condition that can lead to unauthorized modification of protected parts of the file system.

5

What improvements were made in CVE-2026-43811 to address the issue?

CVE-2026-43811 was addressed through improved checks and state management.

Company

Resources

Contact

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