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CVE-2026-80645

8.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: rapidio/tsi721: prevent a bad dereference in tsi721_db_dpc() With a list_for_each() loop, if we don't find the item we are look…

Published Aug 28, 2026EPSS 0.40%

Overview

CVE-2026-80645 is a high-severity vulnerability. It was published on August 28, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

rapidio/tsi721: prevent a bad dereference in tsi721_db_dpc()

With a list_for_each() loop, if we don't find the item we are looking for

in the list, then the loop exits with the iterator, which is "dbell" in

this loop, pointing to invalid memory.

This code uses the "found" variable to determine if we have found the

doorbell we are looking for or not. However, the problem that the "found"

variable needs to be set to false at the start of each iteration,

otherwise after the first correct doorbell, then everything is marked as

found.

Reset the "found" to false at the start of the iteration and move the

variable inside the loop.

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/070f356ea4f419e4e85e4089381f4477f41d969eRefgit.kernel.org/stable/c/13092966ba5d8fb214a4efeddc87f9ed0fd2f945Refgit.kernel.org/stable/c/3b5c66e922aa6a3331915a14520848a5b3beccc7Refgit.kernel.org/stable/c/81c06ef66c3ab6eeaa72eb790c90ae043cdb3d43Refgit.kernel.org/stable/c/9e775c3199903d7c09a52530042b1198eab705bdRefgit.kernel.org/stable/c/acd54f42abbbd806464468838dbc04efd203d2beRefgit.kernel.org/stable/c/dc28a14f3e4546b2b06098d24177942540581a5fRefgit.kernel.org/stable/c/fc15e3a30ddd950f009c76765331783b9af94a87

How CyberStrike helps

Frequently asked questions

What is CVE-2026-80645?

CVE-2026-80645 is a high-severity vulnerability. It was published on August 28, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-80645?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-80645?

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-2026-80645?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-80645 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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