WebKitGTK/WPE WebKit up to 2.50.3 Web buffer overflow

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

Summaryinfo

A vulnerability, which was classified as critical, has been found in WebKitGTK and WPE WebKit up to 2.50.3. This issue affects some unknown processing of the component Web Handler. This manipulation causes buffer overflow. This vulnerability is tracked as CVE-2025-43501. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in WebKitGTK and WPE WebKit up to 2.50.3. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component Web Handler. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in 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. Processing maliciously crafted web content may lead to an unexpected process crash.

The weakness was disclosed by Hossein Lotfi. It is possible to read the advisory at seclists.org. This vulnerability is known as CVE-2025-43501. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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 vulnerability scanner Nessus provides a plugin with the ID 279012 (Linux Distros Unpatched Vulnerability : CVE-2025-43501), 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 (279012) 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

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

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / 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: 279012
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-43501

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
01/24/2026 +38 days VulDB entry last update

Sourcesinfo

Advisory: seclists.org
Researcher: Hossein Lotfi
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2025-43501 (🔒)
GCVE (CVE): GCVE-0-2025-43501
GCVE (VulDB): GCVE-100-336967
CERT Bund: WID-SEC-2025-2891 - WebKitGTK: Mehrere Schwachstellen ermöglichen Codeausführung und DoS

Entryinfo

Created: 12/17/2025 09:38
Updated: 01/24/2026 09:06
Changes: 12/17/2025 09:38 (54), 12/18/2025 19:52 (2), 12/20/2025 00:01 (7), 12/20/2025 09:01 (1), 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.

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