CVE-2026-74647 (CVSS 7.8)

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.

Is your site exposed to CVE-2026-74647?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

7.8

HIGH

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

EPSS — Exploit Prediction

0.0013

Probability of exploitation

0.03%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

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

Frequently Asked Questions

What is CVE-2026-74647? +

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. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-74647? +

CVE-2026-74647 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0013, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-74647? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

CVE-2026-74647