Apple visionOS up to 18.4 Web memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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4.1$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Apple visionOS. Affected by this vulnerability is an unknown functionality of the component Web Handler. Such manipulation leads to memory corruption. This vulnerability is documented as CVE-2025-43343. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Apple visionOS. Affected by this issue is an unknown part of the component Web Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is availability. CVE summarizes:

The issue was addressed with improved memory handling. This issue is fixed in Safari 26, tvOS 26, watchOS 26, iOS 26 and iPadOS 26, visionOS 26. Processing maliciously crafted web content may lead to an unexpected process crash.

The advisory is shared for download at support.apple.com. This vulnerability is handled as CVE-2025-43343 since 04/16/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 01/25/2026).

The vulnerability scanner Nessus provides a plugin with the ID 270564 (RHEL 9 : webkit2gtk3 (RHSA-2025:18097)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 26.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (270564) and CERT Bund (WID-SEC-2025-2269). Once again VulDB remains the best source for vulnerability data.

Affected

  • Red Hat Enterprise Linux
  • Fedora Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • IGEL OS
  • 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: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
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: 270564
Nessus Name: RHEL 9 : webkit2gtk3 (RHSA-2025:18097)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: visionOS 26.0

Timelineinfo

04/16/2025 CVE reserved
09/16/2025 +153 days Advisory disclosed
09/16/2025 +0 days VulDB entry created
01/25/2026 +131 days VulDB entry last update

Sourcesinfo

Vendor: apple.com

Advisory: support.apple.com
Status: Confirmed

CVE: CVE-2025-43343 (🔒)
GCVE (CVE): GCVE-0-2025-43343
GCVE (VulDB): GCVE-100-324236
CERT Bund: WID-SEC-2025-2269 - WebKitGTK: Schwachstelle ermöglicht Denial of Service und potenziell Codeausführung

Entryinfo

Created: 09/16/2025 07:47
Updated: 01/25/2026 09:42
Changes: 09/16/2025 07:47 (56), 10/15/2025 22:04 (7), 10/16/2025 00:15 (2), 11/20/2025 19:51 (1), 01/25/2026 09:42 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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