Linux Kernel up to 6.19.10 Bluetooth btusb_work alts[] privilege escalation

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.19.10 and classified as problematic. Impacted is the function btusb_work of the component Bluetooth. Performing a manipulation of the argument alts[] results in an unknown weakness. This vulnerability is known as CVE-2026-31497. Access to the local network is required for this attack. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.19.10. It has been classified as problematic. This affects the function btusb_work of the component Bluetooth. The manipulation of the argument alts[] with an unknown input leads to a unknown weakness. The impact remains unknown. The summary by CVE is:

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[].

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-31497 since 03/09/2026. The exploitability is told to be easy. The attack needs to be done within the local network. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/18/2026).

The vulnerability scanner Nessus provides a plugin with the ID 318288 (Debian dla-4606 : ata-modules-5.10.0-43-armmp-di - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.253, 5.15.203, 6.1.168, 6.6.131, 6.12.80, 6.18.21 or 6.19.11 eliminates this vulnerability. Applying the patch 312c4450fe23014665c163f480edd5ad2e27bbb8/9dd13a8641de79bc1bc93da55cdd35259a002683/476c9262b430c38c6a701a3b8176a3f48689085b/6fba3c3d48c927e55611a0f5ea34da88138ed0ff/834cf890d2c3d29cbfa1ee2376c40469c28ec297/1019028eb124564cf7bca58a16f1df8a1ca30726/21c254202f9d78abe0fcd642a92966deb92bd226/129fa608b6ad08b8ab7178eeb2ec272c993aaccc is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (318288) and CERT Bund (WID-SEC-2026-1252). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source Linux Kernel

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 318288
Nessus Name: Debian dla-4606 : ata-modules-5.10.0-43-armmp-di - security update

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.253/5.15.203/6.1.168/6.6.131/6.12.80/6.18.21/6.19.11
Patch: 312c4450fe23014665c163f480edd5ad2e27bbb8/9dd13a8641de79bc1bc93da55cdd35259a002683/476c9262b430c38c6a701a3b8176a3f48689085b/6fba3c3d48c927e55611a0f5ea34da88138ed0ff/834cf890d2c3d29cbfa1ee2376c40469c28ec297/1019028eb124564cf7bca58a16f1df8a1ca30726/21c254202f9d78abe0fcd642a92966deb92bd226/129fa608b6ad08b8ab7178eeb2ec272c993aaccc

Timelineinfo

03/09/2026 CVE reserved
04/22/2026 +43 days Advisory disclosed
04/22/2026 +0 days VulDB entry created
06/18/2026 +57 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-31497 (🔒)
GCVE (CVE): GCVE-0-2026-31497
GCVE (VulDB): GCVE-100-358935
CERT Bund: WID-SEC-2026-1252 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 04/22/2026 17:21
Updated: 06/18/2026 03:07
Changes: 04/22/2026 17:21 (58), 06/03/2026 18:45 (2), 06/18/2026 03:07 (7)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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