Mozilla Firefox up to 141 WebRender denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.1$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Mozilla Firefox up to 141. Affected by this issue is some unknown functionality of the component WebRender. Such manipulation leads to denial of service. This vulnerability is traded as CVE-2025-9182. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Mozilla Firefox up to 141 and classified as problematic. Affected by this issue is an unknown function of the component WebRender. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. CVE summarizes:

Denial-of-service due to out-of-memory in the Graphics: WebRender component. This vulnerability affects Firefox < 142, Firefox ESR < 140.2, Thunderbird < 142, and Thunderbird < 140.2.

The advisory is shared for download at bugzilla.mozilla.org. This vulnerability is handled as CVE-2025-9182 since 08/19/2025. 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 10/31/2025). The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 254415 (RHEL 10 : firefox (RHSA-2025:14417)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 142 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (254415) and CERT Bund (WID-SEC-2025-1866). Once again VulDB remains the best source for vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • SUSE Linux
  • Oracle Linux
  • IGEL OS
  • SUSE openSUSE
  • RESF Rocky Linux
  • Mozilla Firefox
  • Mozilla Firefox ESR
  • Mozilla Thunderbird

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

Exploitinginfo

Class: Denial of service
CWE: CWE-404
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: 254415
Nessus Name: RHEL 10 : firefox (RHSA-2025:14417)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Firefox 142

Timelineinfo

08/19/2025 Advisory disclosed
08/19/2025 +0 days CVE reserved
08/19/2025 +0 days VulDB entry created
10/31/2025 +73 days VulDB entry last update

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: bugzilla.mozilla.org
Status: Confirmed

CVE: CVE-2025-9182 (🔒)
GCVE (CVE): GCVE-0-2025-9182
GCVE (VulDB): GCVE-100-320684
CERT Bund: WID-SEC-2025-1866 - Mozilla Firefox und Thunderbird: Mehrere Schwachstellen

Entryinfo

Created: 08/19/2025 23:39
Updated: 10/31/2025 04:21
Changes: 08/19/2025 23:39 (56), 08/20/2025 10:45 (1), 08/25/2025 19:17 (2), 08/28/2025 02:16 (7), 09/07/2025 07:16 (1), 10/12/2025 05:34 (1), 10/31/2025 04:21 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

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