CVE-2025-8028
Critical
Description
On arm64, a WASM `br_table` instruction with a lot of entries could lead to the label being too far from the instruction causing truncation and incorrect computation of the branch address. This vulnerability was fixed in Firefox 141, Firefox ESR 115.26, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Mozilla Firefox
PublishedJul 22, 2025
First seenJul 22, 2025
Weakness typeCWE-1332CWE-1332
How to fix
Update
- mozilla firefox115.26.0, 141.0, 128.13.0, 140.1.0 or later
- mozilla thunderbird128.13.0, 141.0, 140.1.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 115.26.0, v < 141.0, 128.0 ≤ v < 128.13.0, 140.0 ≤ v < 140.1.0 | 115.26.0, 141.0, 128.13.0, 140.1.0 |
| mozilla thunderbird | v < 128.13.0, v < 141.0, 140.0 ≤ v < 140.1.0 | 128.13.0, 141.0, 140.1.0 |
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