CVE-2026-2447
High
Description
Heap buffer overflow in libvpx. This vulnerability was fixed in Firefox 147.0.4, Firefox ESR 140.7.1, Firefox ESR 115.32.1, Thunderbird 140.7.2, and Thunderbird 147.0.2.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Mozilla Firefox
PublishedFeb 16, 2026
First seenFeb 16, 2026
Weakness typeCWE-122CWE-122
How to fix
Update
- mozilla firefox115.32.1, 147.0.4, 140.7.1 or later
- mozilla thunderbird140.7.2, 147.0.2 or later
Vendor advisories
- access.redhat.com/errata/RHSA-2026:3984
- access.redhat.com/errata/RHSA-2026:5320
- access.redhat.com/errata/RHSA-2026:3976
- access.redhat.com/errata/RHSA-2026:5227
- access.redhat.com/errata/RHSA-2026:4260
- access.redhat.com/errata/RHSA-2026:3361
- access.redhat.com/errata/RHSA-2026:4629
- access.redhat.com/errata/RHSA-2026:3517
- access.redhat.com/errata/RHSA-2026:3338
- access.redhat.com/errata/RHSA-2026:3967
- access.redhat.com/errata/RHSA-2026:3515
- access.redhat.com/errata/RHSA-2026:3492
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 115.32.1, v < 147.0.4, 116.0 ≤ v < 140.7.1 | 115.32.1, 147.0.4, 140.7.1 |
| mozilla thunderbird | v < 140.7.2, 141.0 ≤ v < 147.0.2 | 140.7.2, 147.0.2 |
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