CVE-2026-31497
Bluetooth: btusb: clamp SCO altsetting table indices
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[].
INFO
Published Date :
April 22, 2026, 2:16 p.m.
Last Modified :
April 28, 2026, 2:42 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- 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 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.
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.
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.
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Initial Analysis by [email protected]
Apr. 28, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:5.8:-:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.203 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.168 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.21 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 6.19.11 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.131 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.80 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.8.1 up to (excluding) 5.10.253 Added Reference Type kernel.org: https://git.kernel.org/stable/c/1019028eb124564cf7bca58a16f1df8a1ca30726 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/129fa608b6ad08b8ab7178eeb2ec272c993aaccc Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/21c254202f9d78abe0fcd642a92966deb92bd226 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/312c4450fe23014665c163f480edd5ad2e27bbb8 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/476c9262b430c38c6a701a3b8176a3f48689085b Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/6fba3c3d48c927e55611a0f5ea34da88138ed0ff Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/834cf890d2c3d29cbfa1ee2376c40469c28ec297 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/9dd13a8641de79bc1bc93da55cdd35259a002683 Types: Patch -
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