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CVE-2026-31497

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btusb: clamp SCO altsetting table indices btusb_work() maps the number of active SCO links to USB alternate settings…

Published Apr 22, 2026EPSS 0.16%

Overview

CVE-2026-31497 is a medium-severity vulnerability. It was published on April 22, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. 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:

Bluetooth: btusb: clamp SCO altsetting table indices

btusb_work() maps the number of active SCO links to USB alternate

settings through a three-entry lookup table when CVSD traffic uses

transparent voice settings. The lookup currently indexes alts[] with

data->sco_num - 1 without first constraining sco_num to the number of

available table entries.

While the table only defines alternate settings for up to three SCO

links, data->sco_num comes from hci_conn_num() and is used directly.

Cap the lookup to the last table entry before indexing it so the

driver keeps selecting the highest supported alternate setting without

reading past alts[].

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/1019028eb124564cf7bca58a16f1df8a1ca30726Refgit.kernel.org/stable/c/129fa608b6ad08b8ab7178eeb2ec272c993aacccRefgit.kernel.org/stable/c/21c254202f9d78abe0fcd642a92966deb92bd226Refgit.kernel.org/stable/c/312c4450fe23014665c163f480edd5ad2e27bbb8Refgit.kernel.org/stable/c/476c9262b430c38c6a701a3b8176a3f48689085bRefgit.kernel.org/stable/c/6fba3c3d48c927e55611a0f5ea34da88138ed0ffRefgit.kernel.org/stable/c/834cf890d2c3d29cbfa1ee2376c40469c28ec297Refgit.kernel.org/stable/c/9dd13a8641de79bc1bc93da55cdd35259a002683

How CyberStrike helps

Frequently asked questions

What is CVE-2026-31497?

CVE-2026-31497 is a medium-severity vulnerability. It was published on April 22, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-31497?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-31497?

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-2026-31497?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-31497 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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