CVE-2026-31497 (GCVE-0-2026-31497)

Vulnerability from cvelistv5 – Published: 2026-04-22 13:54 – Updated: 2026-04-22 13:54
VLAI?
Title
Bluetooth: btusb: clamp SCO altsetting table indices
Summary
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[].
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 , < 312c4450fe23014665c163f480edd5ad2e27bbb8 (git)
Affected: baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 , < 9dd13a8641de79bc1bc93da55cdd35259a002683 (git)
Affected: baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 , < 476c9262b430c38c6a701a3b8176a3f48689085b (git)
Affected: baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 , < 6fba3c3d48c927e55611a0f5ea34da88138ed0ff (git)
Affected: baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 , < 834cf890d2c3d29cbfa1ee2376c40469c28ec297 (git)
Affected: baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 , < 1019028eb124564cf7bca58a16f1df8a1ca30726 (git)
Affected: baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 , < 21c254202f9d78abe0fcd642a92966deb92bd226 (git)
Affected: baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 , < 129fa608b6ad08b8ab7178eeb2ec272c993aaccc (git)
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    Linux Linux Affected: 5.8
Unaffected: 0 , < 5.8 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.168 , ≤ 6.1.* (semver)
Unaffected: 6.6.131 , ≤ 6.6.* (semver)
Unaffected: 6.12.80 , ≤ 6.12.* (semver)
Unaffected: 6.18.21 , ≤ 6.18.* (semver)
Unaffected: 6.19.11 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/bluetooth/btusb.c"
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              "version": "0",
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              "status": "unaffected",
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            }
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        }
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btusb: clamp SCO altsetting table indices\n\nbtusb_work() maps the number of active SCO links to USB alternate\nsettings through a three-entry lookup table when CVSD traffic uses\ntransparent voice settings. The lookup currently indexes alts[] with\ndata-\u003esco_num - 1 without first constraining sco_num to the number of\navailable table entries.\n\nWhile the table only defines alternate settings for up to three SCO\nlinks, data-\u003esco_num comes from hci_conn_num() and is used directly.\nCap the lookup to the last table entry before indexing it so the\ndriver keeps selecting the highest supported alternate setting without\nreading past alts[]."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-22T13:54:19.051Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/312c4450fe23014665c163f480edd5ad2e27bbb8"
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        {
          "url": "https://git.kernel.org/stable/c/9dd13a8641de79bc1bc93da55cdd35259a002683"
        },
        {
          "url": "https://git.kernel.org/stable/c/476c9262b430c38c6a701a3b8176a3f48689085b"
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        {
          "url": "https://git.kernel.org/stable/c/129fa608b6ad08b8ab7178eeb2ec272c993aaccc"
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      "title": "Bluetooth: btusb: clamp SCO altsetting table indices",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31497",
    "datePublished": "2026-04-22T13:54:19.051Z",
    "dateReserved": "2026-03-09T15:48:24.102Z",
    "dateUpdated": "2026-04-22T13:54:19.051Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.