CVE-2025-5262

high

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 Thunderbird < 139 and Thunderbird < 128.11.

References

https://www.mozilla.org/security/advisories/mfsa2025-46/

https://www.mozilla.org/security/advisories/mfsa2025-45/

https://bugzilla.mozilla.org/show_bug.cgi?id=1962421

Details

Source: Mitre, NVD

Published: 2025-05-27

Updated: 2025-08-20

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00025