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CVE-2026-31497
Bluetooth: btusb: clamp SCO altsetting table indices
Overview
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[].

Details
INFO

Published Date :

April 22, 2026, 2:16 p.m.

Last Modified :

April 22, 2026, 2:16 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-31497 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Solution
Clamp the SCO altsetting table indices to prevent out-of-bounds access.
  • Constrain sco_num to available table entries.
  • Cap the lookup to the last table entry before indexing.
  • Update the Linux kernel to the latest version.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-31497.

URL Resource
https://git.kernel.org/stable/c/1019028eb124564cf7bca58a16f1df8a1ca30726
https://git.kernel.org/stable/c/129fa608b6ad08b8ab7178eeb2ec272c993aaccc
https://git.kernel.org/stable/c/21c254202f9d78abe0fcd642a92966deb92bd226
https://git.kernel.org/stable/c/312c4450fe23014665c163f480edd5ad2e27bbb8
https://git.kernel.org/stable/c/476c9262b430c38c6a701a3b8176a3f48689085b
https://git.kernel.org/stable/c/6fba3c3d48c927e55611a0f5ea34da88138ed0ff
https://git.kernel.org/stable/c/834cf890d2c3d29cbfa1ee2376c40469c28ec297
https://git.kernel.org/stable/c/9dd13a8641de79bc1bc93da55cdd35259a002683
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-31497 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-31497 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-31497 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-31497 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Apr. 22, 2026

    Action Type Old Value New Value
    Added 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[].
    Added Reference https://git.kernel.org/stable/c/1019028eb124564cf7bca58a16f1df8a1ca30726
    Added Reference https://git.kernel.org/stable/c/129fa608b6ad08b8ab7178eeb2ec272c993aaccc
    Added Reference https://git.kernel.org/stable/c/21c254202f9d78abe0fcd642a92966deb92bd226
    Added Reference https://git.kernel.org/stable/c/312c4450fe23014665c163f480edd5ad2e27bbb8
    Added Reference https://git.kernel.org/stable/c/476c9262b430c38c6a701a3b8176a3f48689085b
    Added Reference https://git.kernel.org/stable/c/6fba3c3d48c927e55611a0f5ea34da88138ed0ff
    Added Reference https://git.kernel.org/stable/c/834cf890d2c3d29cbfa1ee2376c40469c28ec297
    Added Reference https://git.kernel.org/stable/c/9dd13a8641de79bc1bc93da55cdd35259a002683
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
No CVSS metrics available for this vulnerability.