CVE-2025-43356: Buffer Overflow

Published Sep 15, 2025
·
Updated

AirPort. A permissions issue was addressed with additional restrictions.

Other sources

AMD. A buffer overflow was addressed with improved bounds checking.

— Apple

AppKit. The issue was resolved by blocking unsigned services from launching on Intel Macs.

— Apple

Apple Neural Engine. An out-of-bounds access issue was addressed with improved bounds checking.

— Apple

Apple Online Store Kit. A permissions issue was addressed with additional restrictions.

— Apple

AppleMobileFileIntegrity. A downgrade issue was addressed with additional code-signing restrictions.

— Apple

Credit

Joey Hewitt, an anonymous researcher, Thomas Salomon, Sufiyan Gouri (TU Darmstadt), Phil Scott & Richard Hyunho Im (@richeeta)@@MrPeriPeri, Mark Bowers, Dylan Rollins, Arthur Baudoin, Andr.Ess, Jaydev Ahire, Big Bear, Pawel Wylecial(REDTEAM), @@RenwaX23, Evan Waelde, Ignacio Sanmillan@@ulexec, Mike Cardwell(grepular), Bob Lord, Mickey Jin@@patch1t, Hossein Lotfi@@hosselot(Trend Micro Zero Day Initiative), Michael Reeves@@IntegralPilot, Nikita Sakalouski, Csaba Fitzl@@theevilbit(Kandji), Rosyna Keller(Totally Not Malicious Software), Guilherme Rambo(Best Buddy Apps), Yinyi Wu@@_3ndy1(Dawn Security Lab of JD), @@zlluny(Trend Micro Zero Day Initiative), 이동하 (Lee Dong Ha)(SSA Lab), Keisuke Hosoda, Viktor Oreshkin, Philipp Baldauf, Minghao Lin@@Y1nKoc, Lyutoon@@Lyutoon_, YingQi Shi@@Mas0n, Dawuge(Shuffle Team), Tom Brzezinski, Abhay Kailasia@@abhay_kailasia(C), KPC(Cisco Talos), 정답이 아닌 해답, Richard Hyunho Im@@richeeta, Jiwon Park, Noah Gregory (wts.dev), CVE-2025-6965, JZ, Seo Hyun-gyu@@wh1te4ever, Luke Roberts@@rookuu, Rodolphe BRUNETTI@@eisw0lf(Lupus Nova), Kirin@@Pwnrin, ABC Research s.r.o., Nolan Astrein(Kandji), Mickey Jin@@patch1t(Cisco Talos), Kirin@@Pwnrin(Cisco Talos), Claudio Bozzato(Cisco Talos), Francesco Benvenuto(Cisco Talos), Zhongquan Li@@Guluisacat, Bilal Siddiqui, Zhongcheng Li(IES Red Team of ByteDance), Matej Moravec@@MacejkoMoravec, Shantanu Thakur, Wang Yu(Cyberserval), Anonymous(Trend Micro Zero Day Initiative), Jian Lee@@speedyfriend433, Yiğit Can YILMAZ@@yilmazcanyigit, Ye Zhang@@VAR10CK(Baidu Security), Nathaniel Oh@@calysteon, Gergely Kalman@@gergely_kalman, Hikerell (Loadshine Lab), Rodolphe Brunetti@@eisw0lf(Lupus Nova), LFY@@secsys(Fudan University), CVE-2025-40909, @@zlluny, CVE-2024-27280, Ye Zhang(Baidu Security), pattern-f@@pattern_F_, Kirin@@Pwnrin(Computer Science), Cristian Dinca(Computer Science), Romania, Ferdous Saljooki@@malwarezoo(Jamf), Justin Elliot Fu, Pyrophoria(GrapheneOS), an anonymous researcher(GrapheneOS), James J Kalafus, Michel Migdal, ken super

Affected Software

33 affected componentsFixes available
Apple iOS<26
26
Apple iPadOS<26
26
Apple Safari<26
26
Apple Safari<26.0
Apple iPadOS<18.7
Apple iPhone OS<18.7
Apple macOS<26.0
Apple tvOS<26.0
Apple visionOS<26.0
Apple WatchOS<26.0
Apple macOS Tahoe<26
26
Apple iOS<18.7
18.7
Apple iPadOS<18.7
18.7
Apple tvOS<26
26
Apple WatchOS<26
26
Apple visionOS<26
26
ubuntu/qtwebkit-opensource-src*
ubuntu/webkit2gtk*
ubuntu/qtwebkit-source*
ubuntu/webkitgtk*
ubuntu/webkit2gtk*
ubuntu/qtwebkit-opensource-src*
ubuntu/qtwebkit-source*
ubuntu/webkitgtk*
ubuntu/webkit2gtk*
ubuntu/qtwebkit-opensource-src*
ubuntu/qtwebkit-opensource-src*
ubuntu/webkit2gtk<2.48.7-0ubuntu0.22.04.2
2.48.7-0ubuntu0.22.04.2
ubuntu/qtwebkit-opensource-src*
ubuntu/webkit2gtk<2.48.7-0ubuntu0.24.04.2
2.48.7-0ubuntu0.24.04.2
ubuntu/webkit2gtk<2.50.0-2ubuntu1
2.50.0-2ubuntu1
debian/webkit2gtk
2.50.6-1~deb12u22.50.6-1~deb12u12.52.6-1~deb13u12.54.0-1~deb13u32.52.6-12.54.2-2
debian/wpewebkit<=2.38.6-1, <=2.48.3-1
2.54.2-1

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
  2. Upgrade

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

    Fixed in 18.7
  3. Upgrade

    Upgrade ubuntu/webkit2gtk to a version that resolves this vulnerability.

    Fixed in 2.48.7-0ubuntu0.22.04.2
  4. Upgrade

    Upgrade ubuntu/webkit2gtk to a version that resolves this vulnerability.

    Fixed in 2.48.7-0ubuntu0.24.04.2
  5. Upgrade

    Upgrade ubuntu/webkit2gtk to a version that resolves this vulnerability.

    Fixed in 2.50.0-2ubuntu1
  6. Upgrade

    Upgrade debian/webkit2gtk to a version that resolves this vulnerability.

    Fixed in 2.50.6-1~deb12u2Fixed in 2.50.6-1~deb12u1Fixed in 2.52.6-1~deb13u1Fixed in 2.54.0-1~deb13u3Fixed in 2.52.6-1Fixed in 2.54.2-2
  7. Upgrade

    Upgrade debian/wpewebkit to a version that resolves this vulnerability.

    Fixed in 2.54.2-1
  8. Upgrade

    Upgrade Safari to a version that resolves this vulnerability.

    Fixed in 26
  9. Upgrade

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

    Fixed in 18.7
  10. Upgrade

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

    Fixed in 26
  11. Upgrade

    Upgrade macOS Tahoe to a version that resolves this vulnerability.

    Fixed in 26
  12. Upgrade

    Upgrade tvOS to a version that resolves this vulnerability.

    Fixed in 26
  13. Upgrade

    Upgrade visionOS to a version that resolves this vulnerability.

    Fixed in 26
  14. Upgrade

    Upgrade watchOS to a version that resolves this vulnerability.

    Fixed in 26
  15. Configuration

    Block unsigned services from launching on Intel Macs

    Intel Macs unsigned services = blocked

Event History

Sep 15, 2025
CVE Published
via Ubuntu·12:00 AM
Data Sourced
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Data Sourced
via Ubuntu·12:00 AM
RemedyDescriptionSeverityAffected Software
CVE Published
via MITRE·10:34 PM
Data Sourced
via MITRE·10:34 PM
DescriptionWeakness
Data Sourced
via OSV·11:15 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·11:15 PM
DescriptionSeverityWeaknessAffected Software
Sep 23, 2025
Data Sourced
via Red Hat·02:25 PM
DescriptionSeverityAffected 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-2025-43356?

CVE-2025-43356 has not been assigned a specific CVSS score, but it addresses multiple significant issues including buffer overflow and permission problems.

2

How do I fix CVE-2025-43356?

To fix CVE-2025-43356, update your affected Apple devices to the latest version of macOS Tahoe, tvOS, iOS, iPadOS, watchOS, or visionOS.

3

What types of devices are affected by CVE-2025-43356?

CVE-2025-43356 affects Apple devices including macOS, tvOS, iOS, iPadOS, watchOS, and visionOS versions prior to the specified patches.

4

What are the key issues addressed by CVE-2025-43356?

CVE-2025-43356 addresses a permissions issue, a buffer overflow with improved bounds checking, and out-of-bounds access problems.

5

Has CVE-2025-43356 been resolved by Apple?

Yes, Apple has resolved CVE-2025-43356 by implementing additional restrictions and launching blocks for unsigned services.

Company

Resources

Contact

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