// For flags

CVE-2025-1931

firefox: Use-after-free in WebTransportChild

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

It was possible to cause a use-after-free in the content process side of a WebTransport connection, leading to a potentially exploitable crash. This vulnerability affects Firefox < 136, Firefox ESR < 115.21, and Firefox ESR < 128.8.

It was possible to cause a use-after-free in the content process side of a WebTransport connection, leading to a potentially exploitable crash. This vulnerability affects Firefox < 136, Firefox ESR < 115.21, Firefox ESR < 128.8, Thunderbird < 136, and Thunderbird < 128.8.

Multiple security issues were discovered in Firefox. If a user were tricked into opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information across domains, or execute arbitrary code. It was discovered that Firefox did not properly handle WebTransport connection, leading to a use-after-free vulnerability. An attacker could potentially exploit this issue to cause a denial of service.

*Credits: sherkito
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2025-02-28 CVE Published
  • 2025-03-04 CVE Reserved
  • 2025-03-26 CVE Updated
  • 2025-07-04 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-416: Use After Free
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Mozilla
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Firefox
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*-
Affected
Mozilla
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Firefox Esr
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*-
Affected
Mozilla
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Thunderbird
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*-
Affected
Oracle
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Linux
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*-
Affected
Redhat
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Enterprise Linux
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*-
Affected
Redhat
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Rhel Aus
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Affected
Redhat
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Rhel E4s
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Affected
Redhat
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Rhel Eus
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*-
Affected
Redhat
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Rhel Tus
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Affected
Alma
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Linux
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Affected
Amazon
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Linux
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Affected
Canonical
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Ubuntu Linux
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Affected
Debian
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Debian Linux
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Affected
Fedoraproject
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Fedora
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Affected
Freebsd
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Freebsd
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Opensuse
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Leap
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Oracle
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Linux
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Redhat
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Enterprise Linux
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Redhat
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Rhel Aus
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Redhat
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Rhel E4s
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Affected
Redhat
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Rhel Els
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Redhat
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Rhel Eus
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Redhat
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Rhel Tus
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Affected
Slackware
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Slackware Linux
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Affected
Suse
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Packagehub
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Affected
Suse
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Sle-module-desktop-applications
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Affected
Suse
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Sle-we
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Suse
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Sle Hpc-espos
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Suse
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Sle Hpc-ltss
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Suse
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Sled
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Suse
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Sles-ltss-extended-security
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Suse
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Sles-ltss
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Suse
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Sles
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Suse
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Sles Sap
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Affected