CVE-2025-21734

Summary

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.

Impact & exploitability

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products we track (1)

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/24a79c6bc8de763f7c50f4f84f8b0c183bc25a51 ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/24a79c6bc8de763f7c50f4f84f8b0c183bc25a51Patch
• https://git.kernel.org/stable/c/c0464bad0e85fcd5d47e4297d1e410097c979e55Patch
• https://git.kernel.org/stable/c/c3f7161123fcbdc64e90119ccce292d8b66281c4Patch
• https://git.kernel.org/stable/c/c56ba3ea8e3c9a69a992aad18f7a65e43e51d623Patch
• https://git.kernel.org/stable/c/e966eae72762ecfdbdb82627e2cda48845b9dd66Patch
• https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html