CVE-2021-47348 Information

Description

In the Linux kernel the following vulnerability has been resolved:

drm/amd/display: Avoid HDCP over-read and corruption

Instead of reading the desired 5 bytes of the actual target field the code was reading 8. This could result in a corrupted value if the trailing 3 bytes were non-zero so instead use an appropriately sized and zero-initialized bounce buffer and read only 5 bytes before casting to u64.

Reference

https://git.kernel.org/stable/c/c5b518f4b98dbb2bc31b6a55e6aaa1e0e2948f2e https://git.kernel.org/stable/c/44c7c901cb368a9f2493748f213b247b5872639f https://git.kernel.org/stable/c/3b2b93a485fb7a970bc8b5daef16f4cf579d172f https://git.kernel.org/stable/c/06888d571b513cbfc0b41949948def6cb81021b2