Apple iOS/iPadOS/tvOS/Safari/visionOS/macOS/watchOS up to 26.1 Web race condition

CVSS Meta Temp Score
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CTI Interest Score
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3.0$5k-$25k0.00

Summaryinfo

A vulnerability was found in Apple iOS, iPadOS, tvOS, Safari, visionOS, macOS and watchOS up to 26.1. It has been classified as problematic. This issue affects some unknown processing of the component Web Handler. The manipulation leads to race condition. This vulnerability is referenced as CVE-2025-43531. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Apple iOS, iPadOS, tvOS, Safari, visionOS, macOS and watchOS up to 26.1 and classified as problematic. This issue affects an unknown code block of the component Web Handler. The manipulation with an unknown input leads to a race condition vulnerability. Using CWE to declare the problem leads to CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. Impacted is availability. The summary by CVE is:

A race condition was addressed with improved state handling. This issue is fixed in watchOS 26.2, Safari 26.2, iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2 and iPadOS 26.2, macOS Tahoe 26.2, visionOS 26.2, tvOS 26.2. Processing maliciously crafted web content may lead to an unexpected process crash.

It is possible to read the advisory at support.apple.com. The identification of this vulnerability is CVE-2025-43531 since 04/16/2025. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 01/24/2026).

The vulnerability scanner Nessus provides a plugin with the ID 279093 (Debian dsa-6083 : gir1.2-javascriptcoregtk-4.0 - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 26.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (279093) and CERT Bund (WID-SEC-2025-2891). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source WebKitGTK

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.1
VulDB Meta Temp Score: 3.0

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 279093
Nessus Name: Debian dsa-6083 : gir1.2-javascriptcoregtk-4.0 - security update

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: iOS/iPadOS/tvOS/Safari/visionOS/macOS/watchOS 26.2

Timelineinfo

04/16/2025 CVE reserved
12/17/2025 +245 days Advisory disclosed
12/17/2025 +0 days VulDB entry created
01/24/2026 +38 days VulDB entry last update

Sourcesinfo

Vendor: apple.com

Advisory: support.apple.com
Status: Confirmed

CVE: CVE-2025-43531 (🔒)
GCVE (CVE): GCVE-0-2025-43531
GCVE (VulDB): GCVE-100-337055
CERT Bund: WID-SEC-2025-2891 - WebKitGTK: Mehrere Schwachstellen ermöglichen Codeausführung und DoS

scip Labs: https://www.scip.ch/en/?labs.20180712

Entryinfo

Created: 12/17/2025 22:17
Updated: 01/24/2026 09:06
Changes: 12/17/2025 22:17 (56), 12/19/2025 02:50 (2), 12/20/2025 00:01 (7), 01/04/2026 06:35 (1), 01/24/2026 09:06 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

Discussion

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