CVE-2025-21734 Information

Description

In the Linux kernel the following vulnerability has been resolved:

misc: fastrpc: Fix copy buffer page size

For non-registered buffer fastrpc driver copies the buffer and pass it to the remote subsystem. There is a problem with current implementation of page size calculation which is not considering the offset in the calculation. This might lead to passing of improper and out-of-bounds page size which could result in memory issue. Calculate page start and page end using the offset adjusted address instead of absolute address.

Reference

https://git.kernel.org/stable/c/24a79c6bc8de763f7c50f4f84f8b0c183bc25a51 https://git.kernel.org/stable/c/c0464bad0e85fcd5d47e4297d1e410097c979e55 https://git.kernel.org/stable/c/c3f7161123fcbdc64e90119ccce292d8b66281c4 https://git.kernel.org/stable/c/c56ba3ea8e3c9a69a992aad18f7a65e43e51d623 https://git.kernel.org/stable/c/e966eae72762ecfdbdb82627e2cda48845b9dd66