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CVE-2025-1931: It was possible to cause a use-after-free in the content process side of a WebTransport connection, leading to a potentially exploitable crash....

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.

Classification

CVE ID: CVE-2025-1931

Problem Types

Use-after-free in WebTransportChild

Affected Products

Vendor: Mozilla, Mozilla, Mozilla

Product: Firefox, Firefox ESR, Firefox ESR

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.21% (probability of being exploited)

EPSS Percentile: 40.12% (scored less or equal to compared to others)

EPSS Date: 2025-04-02 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-1931
https://bugzilla.mozilla.org/show_bug.cgi?id=1944126
https://www.mozilla.org/security/advisories/mfsa2025-14/
https://www.mozilla.org/security/advisories/mfsa2025-15/
https://www.mozilla.org/security/advisories/mfsa2025-16/

Timeline