Denial-of-Service Vulnerability in Firefox and Thunderbird WebRender Components
CVE-2025-9182

7.5HIGH

Key Information:

Vendor

Mozilla
Status
Firefox
Firefox Esr
Thunderbird
Vendor
CVE Published:
19 August 2025

What is CVE-2025-9182?

This vulnerability in the WebRender component of Firefox and Thunderbird can lead to a denial-of-service condition due to an out-of-memory error. It affects several versions of Firefox and Thunderbird, making it crucial for users to update their software to ensure protection against potential crashes and service interruptions.

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Affected Version(s)

Firefox < 142

Firefox ESR < 140.2

Thunderbird < 142

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1975837
https://www.mozilla.org/security/advisories/mfsa2025-64/
https://www.mozilla.org/security/advisories/mfsa2025-67/

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Irvan Kurniawan
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