CVE-2025-21734
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.20%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.20% probability · 10th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.