CVE-2025-5262 json
A double-free could have occurred in `vpx_codec_enc_init_multi` after a failed allocation when initializing the encoder for WebRTC.
published last yr. modified 4mo ago also EUVD-2025-25234
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 40%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Mozilla Thunderbird 128.11, 139
- MozillaThunderbird SLE Workstation Extension 15 SP7, SLE Workstation Extension 15 SP6, SLE Module for Package Hub 15 SP7 +2 more 128.11.0-150200.8.221.1
suse advisories SUSE-SU-2025:01946-1
- MozillaThunderbird openSUSE Tumbleweed 128.11.0-1.1
- firefox-esr openSUSE Tumbleweed 128.11.0-1.1
opensuse advisories openSUSE-SU-2025:15174-1openSUSE-SU-2025:15170-1
Is CVE-2025-5262 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- last yr.
Exploit prediction
0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
- Mozilla Thunderbird
Classification
- Weakness
-
- CWE-415 Double Free
References
-
mozilla.org
/security/advisories/mfsa2025-45/
vendor-advisory
-
mozilla.org
/security/advisories/mfsa2025-46/
vendor-advisory
-
bugzilla.mozilla.org
/show_bug.cgi?id=1962421
issue-tracking, permissions-required
Sources
- CVE List CVE-2025-5262
- NVD CVE-2025-5262
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.