Answer in brief
CVE-2026-31497 records a Unknown severity vulnerability in Bluetooth: btusb: clamp SCO altsetting table indices. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 <312c4450fe23014665c163f480edd5ad2e27bbb8 || >=baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 <9dd13a8641de79bc1bc93da55cdd35259a002683 || >=baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 <476c9262b430c38c6a701a3b8176a3f48689085b || >=baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 <6fba3c3d48c927e55611a0f5ea34da88138ed0ff || >=baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 <834cf890d2c3d29cbfa1ee2376c40469c28ec297 || >=baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 <1019028eb124564cf7bca58a16f1df8a1ca30726 || >=baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 <21c254202f9d78abe0fcd642a92966deb92bd226 || >=baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 <129fa608b6ad08b8ab7178eeb2ec272c993aaccc | 312c4450fe23014665c163f480edd5ad2e27bbb8, 9dd13a8641de79bc1bc93da55cdd35259a002683, 476c9262b430c38c6a701a3b8176a3f48689085b, 6fba3c3d48c927e55611a0f5ea34da88138ed0ff, 834cf890d2c3d29cbfa1ee2376c40469c28ec297, 1019028eb124564cf7bca58a16f1df8a1ca30726, 21c254202f9d78abe0fcd642a92966deb92bd226, 129fa608b6ad08b8ab7178eeb2ec272c993aaccc |
| Linux/Linuxgeneric | 5.8 | Not reported |
Published upstream
Apr 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 5, 2026
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[].
Quoted source text, attributed separately from HOL analysis.