In the Linux kernel, the following vulnerability has been resolved:
ASoC: tas2781: bound firmware description string parsing
The TAS2781 firmware parser reads several variable-length description strings with strlen() before checking that the string terminator is present inside the firmware blob. A malformed firmware image without a NUL terminator can therefore make the parser walk past the end of the firmware buffer before the later size checks run.
Add a small bounded string-length helper and use it for all description fields that are parsed from the firmware buffer. Keep the existing size checks for the fixed bytes that follow each string.
References
- https://git.kernel.org/stable/c/0ec45e80a82785ee147516fdecf5c93707dec119
- https://git.kernel.org/stable/c/3ddb0d3e36507615e5ef010a879357a54870adf5
- https://git.kernel.org/stable/c/41ae2b7d37c3dd82302167496836cca9f0328374
- https://git.kernel.org/stable/c/bc889dfcea9294a1eae7f8e2f3573a90764ae4d0
- https://git.kernel.org/stable/c/e75ef37d83c90b09bedb601624b47e168202b226