CVE-2026-31497Bluetooth: btusb: clamp SCO altsetting table indices
- 5.5MediumCVSS base score
- 0.12%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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[].
Timeline
ID reserved
By Linux
- 44 days later
· 44 days later
Published
- 7 months later
· 7 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.12% · top 98% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 – < 312c4450fe23014665c163f480edd5ad2e27bbb8
- affected baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 – < 9dd13a8641de79bc1bc93da55cdd35259a002683
- affected baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 – < 476c9262b430c38c6a701a3b8176a3f48689085b
- affected baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 – < 6fba3c3d48c927e55611a0f5ea34da88138ed0ff
- affected baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 – < 834cf890d2c3d29cbfa1ee2376c40469c28ec297
- affected baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 – < 1019028eb124564cf7bca58a16f1df8a1ca30726
- affected baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 – < 21c254202f9d78abe0fcd642a92966deb92bd226
- affected baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 – < 129fa608b6ad08b8ab7178eeb2ec272c993aaccc
- affected 5.8
- unaffected < 5.8
- unaffected 5.10.253 – ≤ 5.10.*
- unaffected 5.15.203 – ≤ 5.15.*
- unaffected 6.1.168 – ≤ 6.1.*
- unaffected 6.6.131 – ≤ 6.6.*
- unaffected 6.12.80 – ≤ 6.12.*
- unaffected 6.18.21 – ≤ 6.18.*
- unaffected 6.19.11 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References8
- https://git.kernel.org/stable/c/312c4450fe23014665c163f480edd5ad2e27bbb8 (opens in a new tab)
- https://git.kernel.org/stable/c/9dd13a8641de79bc1bc93da55cdd35259a002683 (opens in a new tab)
- https://git.kernel.org/stable/c/476c9262b430c38c6a701a3b8176a3f48689085b (opens in a new tab)
- https://git.kernel.org/stable/c/6fba3c3d48c927e55611a0f5ea34da88138ed0ff (opens in a new tab)
- https://git.kernel.org/stable/c/834cf890d2c3d29cbfa1ee2376c40469c28ec297 (opens in a new tab)
- https://git.kernel.org/stable/c/1019028eb124564cf7bca58a16f1df8a1ca30726 (opens in a new tab)
- https://git.kernel.org/stable/c/21c254202f9d78abe0fcd642a92966deb92bd226 (opens in a new tab)
- https://git.kernel.org/stable/c/129fa608b6ad08b8ab7178eeb2ec272c993aaccc (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-24870 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-31497)Record last updated .