CVE-2025-5262 – VP8 WebRTC Double-Free Vulnerability

The following table lists the changes that have been made to the
CVE-2025-5262 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]

    May. 27, 2025

    Action Type Old Value New Value
    Added Description A double-free could have occurred in `vpx_codec_enc_init_multi` after a failed allocation when initializing the encoder for WebRTC. This could have caused memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 139, Firefox ESR < 115.24, and Firefox ESR < 128.11.
    Added Reference https://bugzilla.mozilla.org/show_bug.cgi?id=1962421
    Added Reference https://www.mozilla.org/security/advisories/mfsa2025-42/
    Added Reference https://www.mozilla.org/security/advisories/mfsa2025-43/
    Added Reference https://www.mozilla.org/security/advisories/mfsa2025-44/
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