Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: Remove buffer from list prior to unmap operation fastrpc_req_munmap_impl() is called to unmap any buffer. The buffer is getting removed from the list after it is unmapped from DSP. This can create potential race conditions if multiple threads invoke unmap concurrently, where one thread may remove the entry from the list while another thread's unmap operation is still ongoing. Fix this by removing the buffer entry from the list before calling the unmap operation. If the unmap fails, the entry is re-added to the list so that userspace can retry the unmap, or alternatively, the buffer will be cleaned up during device release when the DSP process is torn down and all DSP-side mappings are freed along with remaining buffers in the list.
References
- https://git.kernel.org/stable/c/0beaa9bd7eb10d9b5e6352ed5161f3f3bbd4c3c5
- https://git.kernel.org/stable/c/6102ceb4eab845743ee57acd3863fbd06e93c927
- https://git.kernel.org/stable/c/97273624f7b356eaf8261609a75cfcb8738a165a
- https://git.kernel.org/stable/c/9bf22a7d950cec2d1efeca7f16bb20fcca84c36a
- https://git.kernel.org/stable/c/fe70329055977fc1e8dc6291318d0dd75470795a
FAQ
What is CVE-2026-74647?
CVE-2026-74647 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: Remove buffer from list prior to unmap operation fastrpc_req_munmap_impl() is called to unmap any buffer. The buffe...
How severe is CVE-2026-74647?
CVSS scoring is not yet available for CVE-2026-74647. Check NVD for updates.
Is there a patch for CVE-2026-74647?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.