High 7.8Published Aug 22, 2026

CVE-2026-74647misc: fastrpc: Remove buffer from list prior to unmap operation

Updated under an hour ago (Oct 27, 2026, 10:23 AM ET)

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Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Aug 27, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	2419e55e532de14fdf336e09e453aa2831c73a25 builds before 1edb654b2b41baee2ab5cf418baaf6e57dfbd802; from 2419e55e532de14fdf336e09e453aa2831c73a25 before 4716c23c206a2f99ca54ebfdd8b5ba9dd0102240; 2419e55e532de14fdf336e09e453aa2831c73a25 builds before 99f8de36c84cb9b872157aa6c3578c2480cee4b8; from 2419e55e532de14fdf336e09e453aa2831c73a25 before 97273624f7b356eaf8261609a75cfcb8738a165a; from 2419e55e532de14fdf336e09e453aa2831c73a25 before fe70329055977fc1e8dc6291318d0dd75470795a; 2419e55e532de14fdf336e09e453aa2831c73a25 builds before 9bf22a7d950cec2d1efeca7f16bb20fcca84c36a; 2419e55e532de14fdf336e09e453aa2831c73a25 builds before 0beaa9bd7eb10d9b5e6352ed5161f3f3bbd4c3c5; from 2419e55e532de14fdf336e09e453aa2831c73a25 before 6102ceb4eab845743ee57acd3863fbd06e93c927	CNA record

References

References

https://git.kernel.org/stable/c/1edb654b2b41baee2ab5cf418baaf6e57dfbd802
https://git.kernel.org/stable/c/4716c23c206a2f99ca54ebfdd8b5ba9dd0102240
https://git.kernel.org/stable/c/99f8de36c84cb9b872157aa6c3578c2480cee4b8
https://git.kernel.org/stable/c/97273624f7b356eaf8261609a75cfcb8738a165a
https://git.kernel.org/stable/c/fe70329055977fc1e8dc6291318d0dd75470795a
https://git.kernel.org/stable/c/9bf22a7d950cec2d1efeca7f16bb20fcca84c36a
https://git.kernel.org/stable/c/0beaa9bd7eb10d9b5e6352ed5161f3f3bbd4c3c5
https://git.kernel.org/stable/c/6102ceb4eab845743ee57acd3863fbd06e93c927

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.