CVE-2025-5262 — Double Free in Mozilla Thunderbird

CWE-415 — Double Free5 documents5 sources
Severity
7.5HIGHNVD
EPSS
0.4%
top 40.48%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Mozilla Thunderbird
Timeline
PublishedMay 27

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages2 packages

▶CVEListV5mozilla/thunderbirdunspecified — 139+1
▶NVDmozilla/thunderbird< 128.11.0+1

🔴Vulnerability Details

3
GHSA
GHSA-v5j6-fjmw-w724: A double-free could have occurred in `vpx_codec_enc_init_multi` after a failed allocation when initializing the encoder for WebRTC↗2025-05-27
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CVEList
CVE-2025-5262: A double-free could have occurred in `vpx_codec_enc_init_multi` after a failed allocation when initializing the encoder for WebRTC↗2025-05-27
▶
OSV
CVE-2025-5262: A double-free could have occurred in `vpx_codec_enc_init_multi` after a failed allocation when initializing the encoder for WebRTC↗2025-05-27
▶

📋Vendor Advisories

1
Red Hat
firefox: thunderbird: Double-free in libvpx encoder↗2025-05-27
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CVE-2025-5262 — Double Free in Mozilla Thunderbird | cvebase