{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-31500",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-31500",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-04-22T13:54:21.071Z",
    "updatedAt": "2026-10-15T01:16:40.314Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "Bluetooth: btintel: serialize btintel_hw_error() with hci_req_sync_lock",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btintel: serialize btintel_hw_error() with hci_req_sync_lock\n\nbtintel_hw_error() issues two __hci_cmd_sync() calls (HCI_OP_RESET\nand Intel exception-info retrieval) without holding\nhci_req_sync_lock().  This lets it race against\nhci_dev_do_close() -> btintel_shutdown_combined(), which also runs\n__hci_cmd_sync() under the same lock.  When both paths manipulate\nhdev->req_status/req_rsp concurrently, the close path may free the\nresponse skb first, and the still-running hw_error path hits a\nslab-use-after-free in kfree_skb().\n\nWrap the whole recovery sequence in hci_req_sync_lock/unlock so it\nis serialized with every other synchronous HCI command issuer.\n\nBelow is the data race report and the kasan report:\n\n  BUG: data-race in __hci_cmd_sync_sk / btintel_shutdown_combined\n\n  read of hdev->req_rsp at net/bluetooth/hci_sync.c:199\n  by task kworker/u17:1/83:\n   __hci_cmd_sync_sk+0x12f2/0x1c30 net/bluetooth/hci_sync.c:200\n   __hci_cmd_sync+0x55/0x80 net/bluetooth/hci_sync.c:223\n   btintel_hw_error+0x114/0x670 drivers/bluetooth/btintel.c:254\n   hci_error_reset+0x348/0xa30 net/bluetooth/hci_core.c:1030\n\n  write/free by task ioctl/22580:\n   btintel_shutdown_combined+0xd0/0x360\n    drivers/bluetooth/btintel.c:3648\n   hci_dev_close_sync+0x9ae/0x2c10 net/bluetooth/hci_sync.c:5246\n   hci_dev_do_close+0x232/0x460 net/bluetooth/hci_core.c:526\n\n  BUG: KASAN: slab-use-after-free in\n   sk_skb_reason_drop+0x43/0x380 net/core/skbuff.c:1202\n  Read of size 4 at addr ffff888144a738dc\n  by task kworker/u17:1/83:\n   __hci_cmd_sync_sk+0x12f2/0x1c30 net/bluetooth/hci_sync.c:200\n   __hci_cmd_sync+0x55/0x80 net/bluetooth/hci_sync.c:223\n   btintel_hw_error+0x186/0x670 drivers/bluetooth/btintel.c:260",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "973bb97e5aee56edddaae3d5c96877101ad509c0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7e041d0aad1d4d43d921ace052e04f4e2cacaed3"
            },
            {
              "version": "973bb97e5aee56edddaae3d5c96877101ad509c0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5f84e845648dfa86e42de5487f1a774b42f0444d"
            },
            {
              "version": "973bb97e5aee56edddaae3d5c96877101ad509c0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e10a4cb72468686ffbe8bb2b0520e37f6be1a0c5"
            },
            {
              "version": "973bb97e5aee56edddaae3d5c96877101ad509c0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "66696648af477dc87859e5e4b607112f5f29d010"
            },
            {
              "version": "973bb97e5aee56edddaae3d5c96877101ad509c0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f7d84737663ad4a120d2d8ef1561a4df91282c2e"
            },
            {
              "version": "973bb97e5aee56edddaae3d5c96877101ad509c0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "94d8e6fe5d0818e9300e514e095a200bd5ff93ae"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.3",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.3"
            },
            {
              "version": "6.1.175",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.131",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.80",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.21",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.11",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}