critical9.8
CVE-2025-1942
When String.toUpperCase() caused a string to get longer it was possible for uninitialized memory to be incorporated into the result string.
Impact
When String.toUpperCase() caused a string to get longer it was possible for uninitialized memory to be incorporated into the result string. This vulnerability was fixed in Firefox 136 and Thunderbird 136.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mozilla | Firefox | before 136.0 |
| Mozilla | Thunderbird | before 136.0 |