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CVE-2026-74647

7.8 · HIGH

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.

Published Aug 22, 2026EPSS 0.18%

Overview

CVE-2026-74647 is a high-severity vulnerability. It was published on August 22, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/0beaa9bd7eb10d9b5e6352ed5161f3f3bbd4c3c5Refgit.kernel.org/stable/c/1edb654b2b41baee2ab5cf418baaf6e57dfbd802Refgit.kernel.org/stable/c/4716c23c206a2f99ca54ebfdd8b5ba9dd0102240Refgit.kernel.org/stable/c/6102ceb4eab845743ee57acd3863fbd06e93c927Refgit.kernel.org/stable/c/97273624f7b356eaf8261609a75cfcb8738a165aRefgit.kernel.org/stable/c/99f8de36c84cb9b872157aa6c3578c2480cee4b8Refgit.kernel.org/stable/c/9bf22a7d950cec2d1efeca7f16bb20fcca84c36aRefgit.kernel.org/stable/c/fe70329055977fc1e8dc6291318d0dd75470795a

How CyberStrike helps

Frequently asked questions

What is CVE-2026-74647?

CVE-2026-74647 is a high-severity vulnerability. It was published on August 22, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-74647?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-74647?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-74647?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-74647 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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