In Das U-Boot versions 2016.11-rc1 through 2019.07-rc4, an underflow can cause memcpy() to overwrite a very large amount of data (including the whole stack) while reading a crafted ext4 filesystem.
The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| U-boot | Denx | 2016.09 (including) | 2019.04 (including) |
| U-boot | Denx | 2019.07 (including) | 2019.07 (including) |
| U-boot | Denx | 2019.07-rc1 (including) | 2019.07-rc1 (including) |
| U-boot | Denx | 2019.07-rc2 (including) | 2019.07-rc2 (including) |
| U-boot | Denx | 2019.07-rc3 (including) | 2019.07-rc3 (including) |
| U-boot | Denx | 2019.07-rc4 (including) | 2019.07-rc4 (including) |
| U-boot | Ubuntu | bionic | * |
| U-boot | Ubuntu | disco | * |
| U-boot | Ubuntu | eoan | * |
| U-boot | Ubuntu | focal | * |
| U-boot | Ubuntu | trusty | * |
| U-boot | Ubuntu | upstream | * |