WebKitGTK/WPE WebKit up to 2.50.3 Web use after free

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability was found in WebKitGTK and WPE WebKit up to 2.50.3 and classified as critical. The impacted element is an unknown function of the component Web Handler. Executing a manipulation can lead to use after free. This vulnerability is registered as CVE-2025-43536. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in WebKitGTK and WPE WebKit up to 2.50.3. This vulnerability affects an unknown code of the component Web Handler. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A use-after-free issue was addressed with improved memory management. This issue is fixed in macOS Tahoe 26.2, iOS 26.2 and iPadOS 26.2, Safari 26.2, iOS 18.7.3 and iPadOS 18.7.3. Processing maliciously crafted web content may lead to an unexpected process crash.

The weakness was published by Nan Wang. The advisory is available at seclists.org. This vulnerability was named CVE-2025-43536. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 279026 (Linux Distros Unpatched Vulnerability : CVE-2025-43536), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.50.4 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (279026) and CERT Bund (WID-SEC-2025-2891). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

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

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Use after free
CWE: CWE-416 / 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: 279026
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-43536

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: WebKitGTK/WPE WebKit 2.50.4

Timelineinfo

12/17/2025 Advisory disclosed
12/17/2025 +0 days VulDB entry created
01/25/2026 +39 days VulDB entry last update

Sourcesinfo

Advisory: seclists.org
Researcher: Nan Wang
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2025-43536 (🔒)
GCVE (CVE): GCVE-0-2025-43536
GCVE (VulDB): GCVE-100-336970
CERT Bund: WID-SEC-2025-2891 - WebKitGTK: Mehrere Schwachstellen ermöglichen Codeausführung und DoS

Entryinfo

Created: 12/17/2025 09:40
Updated: 01/25/2026 03:30
Changes: 12/17/2025 09:40 (54), 12/18/2025 07:18 (2), 12/20/2025 01:00 (7), 12/20/2025 09:01 (1), 01/04/2026 07:39 (1), 01/25/2026 03:30 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

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