CVE-2026-31497
Bluetooth: btusb: clamp SCO altsetting table indices
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[].
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ baac6276c0a9f36f1fe1f00590ef00d2ba5ba626; < 312c4450fe23014665c163f480edd5ad2e27bbb8 (affected, git) ≥ baac6276c0a9f36f1fe1f00590ef00d2ba5ba626; < 9dd13a8641de79bc1bc93da55cdd35259a002683 (affected, git) ≥ baac6276c0a9f36f1fe1f00590ef00d2ba5ba626; < 476c9262b430c38c6a701a3b8176a3f48689085b (affected, git) ≥ baac6276c0a9f36f1fe1f00590ef00d2ba5ba626; < 6fba3c3d48c927e55611a0f5ea34da88138ed0ff (affected, git) ≥ baac6276c0a9f36f1fe1f00590ef00d2ba5ba626; < 834cf890d2c3d29cbfa1ee2376c40469c28ec297 (affected, git) ≥ baac6276c0a9f36f1fe1f00590ef00d2ba5ba626; < 1019028eb124564cf7bca58a16f1df8a1ca30726 (affected, git) ≥ baac6276c0a9f36f1fe1f00590ef00d2ba5ba626; < 21c254202f9d78abe0fcd642a92966deb92bd226 (affected, git) ≥ baac6276c0a9f36f1fe1f00590ef00d2ba5ba626; < 129fa608b6ad08b8ab7178eeb2ec272c993aaccc (affected, git) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
5.8 (affected) ≥ 0; < 5.8 (unaffected, semver) ≥ 5.10.253; ≤ 5.10.* (unaffected, semver) ≥ 5.15.203; ≤ 5.15.* (unaffected, semver) ≥ 6.1.168; ≤ 6.1.* (unaffected, semver) ≥ 6.6.131; ≤ 6.6.* (unaffected, semver) ≥ 6.12.80; ≤ 6.12.* (unaffected, semver) ≥ 6.18.21; ≤ 6.18.* (unaffected, semver) ≥ 6.19.11; ≤ 6.19.* (unaffected, semver) ≥ 7.0; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/312c4450fe23014665c163f480edd5ad2e27bbb8CNA: Linux
- https://git.kernel.org/stable/c/9dd13a8641de79bc1bc93da55cdd35259a002683CNA: Linux
- https://git.kernel.org/stable/c/476c9262b430c38c6a701a3b8176a3f48689085bCNA: Linux
- https://git.kernel.org/stable/c/6fba3c3d48c927e55611a0f5ea34da88138ed0ffCNA: Linux
- https://git.kernel.org/stable/c/834cf890d2c3d29cbfa1ee2376c40469c28ec297CNA: Linux
- https://git.kernel.org/stable/c/1019028eb124564cf7bca58a16f1df8a1ca30726CNA: Linux
- https://git.kernel.org/stable/c/21c254202f9d78abe0fcd642a92966deb92bd226CNA: Linux
- https://git.kernel.org/stable/c/129fa608b6ad08b8ab7178eeb2ec272c993aacccCNA: Linux
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