CVE-2025-1931 – Mozilla Firefox WebTransport Use-After-Free Vulnerability

The following table lists the changes that have been made to the
CVE-2025-1931 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Mar. 04, 2025

    Action Type Old Value New Value
    Added Description 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.
    Added Reference https://bugzilla.mozilla.org/show_bug.cgi?id=1944126
    Added Reference https://www.mozilla.org/security/advisories/mfsa2025-14/
    Added Reference https://www.mozilla.org/security/advisories/mfsa2025-15/
    Added Reference https://www.mozilla.org/security/advisories/mfsa2025-16/
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