Vulnerability-Lookup

GHSA-79JP-J4MV-P57C

Vulnerability from github – Published: 2026-10-18 18:31 – Updated: 2026-10-30 15:33

Details

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: mgmt: fix race in read_unconf_index_list()

read_unconf_index_list() counts unconfigured controllers before allocating its response, then checks the device flags again while filling it.

hci_dev_list_lock stabilizes list membership, but it does not serialize the per-device flags. During asynchronous controller setup, the worker can set HCI_UNCONFIGURED and clear HCI_SETUP between the two passes. A controller omitted from the allocation count can then become eligible for the fill pass, causing an out-of-bounds write to rp->index[].

Allocate space for every device on hci_dev_list. Since list membership cannot change while hci_dev_list_lock is held, the response remains large enough regardless of flag transitions. The reported count and response length still include only eligible unconfigured controllers.

Severity

7.0 (High)


                  
                    CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98456"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-18T16:16:56Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: mgmt: fix race in read_unconf_index_list()\n\nread_unconf_index_list() counts unconfigured controllers before allocating\nits response, then checks the device flags again while filling it.\n\nhci_dev_list_lock stabilizes list membership, but it does not serialize the\nper-device flags. During asynchronous controller setup, the worker can set\nHCI_UNCONFIGURED and clear HCI_SETUP between the two passes. A controller\nomitted from the allocation count can then become eligible for the fill\npass, causing an out-of-bounds write to rp-\u003eindex[].\n\nAllocate space for every device on hci_dev_list. Since list membership\ncannot change while hci_dev_list_lock is held, the response remains large\nenough regardless of flag transitions. The reported count and response\nlength still include only eligible unconfigured controllers.",
  "id": "GHSA-79jp-j4mv-p57c",
  "modified": "2026-10-30T15:33:53Z",
  "published": "2026-10-18T18:31:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98456"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2e8bba0360d1379bfa8da47c8f5dadbb10a3fba1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/416546cd6a54e9b68f2b91bc680b1ee17dcd77a1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/524e0450dd9a396f99a81b045219b0e2ea0dab57"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/76dc7e0297f6f7ebefc36a69251e3f4a676d9853"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8ddf962c76432a10a6cb80042875cbc48a9c056b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9c32455f490b960efccedd041c7aabb1a04c5cc4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b5dbb41b212c50c095a4dbee3017a84fe94f033b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fa6f79bb0009406bb11e6912b53ab7c564d6f06b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-98456 (GCVE-0-2026-98456)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:15 – Updated: 2026-10-30 12:38

Title

Bluetooth: mgmt: fix race in read_unconf_index_list()

Summary

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: mgmt: fix race in read_unconf_index_list() read_unconf_index_list() counts unconfigured controllers before allocating its response, then checks the device flags again while filling it. hci_dev_list_lock stabilizes list membership, but it does not serialize the per-device flags. During asynchronous controller setup, the worker can set HCI_UNCONFIGURED and clear HCI_SETUP between the two passes. A controller omitted from the allocation count can then become eligible for the fill pass, causing an out-of-bounds write to rp->index[]. Allocate space for every device on hci_dev_list. Since list membership cannot change while hci_dev_list_lock is held, the response remains large enough regardless of flag transitions. The reported count and response length still include only eligible unconfigured controllers.

Severity

7 (High)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7018 records in the last 180 days details

References

8 references

URL	Tags
https://git.kernel.org/stable/c/fa6f79bb0009406bb…
https://git.kernel.org/stable/c/76dc7e0297f6f7ebe…
https://git.kernel.org/stable/c/9c32455f490b960ef…
https://git.kernel.org/stable/c/524e0450dd9a396f9…
https://git.kernel.org/stable/c/8ddf962c76432a10a…
https://git.kernel.org/stable/c/416546cd6a54e9b68…
https://git.kernel.org/stable/c/2e8bba0360d1379bf…
https://git.kernel.org/stable/c/b5dbb41b212c50c09…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 , < fa6f79bb0009406bb11e6912b53ab7c564d6f06b (git) Affected: 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 , < 76dc7e0297f6f7ebefc36a69251e3f4a676d9853 (git) Affected: 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 , < 9c32455f490b960efccedd041c7aabb1a04c5cc4 (git) Affected: 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 , < 524e0450dd9a396f99a81b045219b0e2ea0dab57 (git) Affected: 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 , < 8ddf962c76432a10a6cb80042875cbc48a9c056b (git) Affected: 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 , < 416546cd6a54e9b68f2b91bc680b1ee17dcd77a1 (git) Affected: 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 , < 2e8bba0360d1379bfa8da47c8f5dadbb10a3fba1 (git) Affected: 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 , < b5dbb41b212c50c095a4dbee3017a84fe94f033b (git)
Linux	Linux	Affected: 3.17 Unaffected: 0 , < 3.17 (semver) Unaffected: 5.10.273 , ≤ 5.10.* (semver) Unaffected: 5.15.224 , ≤ 5.15.* (semver) Unaffected: 6.1.191 , ≤ 6.1.* (semver) Unaffected: 6.6.158 , ≤ 6.6.* (semver) Unaffected: 6.12.112 , ≤ 6.12.* (semver) Unaffected: 6.18.55 , ≤ 6.18.* (semver) Unaffected: 7.2.9 , ≤ 7.2.* (semver) Unaffected: 7.3 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/mgmt.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "fa6f79bb0009406bb11e6912b53ab7c564d6f06b",
              "status": "affected",
              "version": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854",
              "versionType": "git"
            },
            {
              "lessThan": "76dc7e0297f6f7ebefc36a69251e3f4a676d9853",
              "status": "affected",
              "version": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854",
              "versionType": "git"
            },
            {
              "lessThan": "9c32455f490b960efccedd041c7aabb1a04c5cc4",
              "status": "affected",
              "version": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854",
              "versionType": "git"
            },
            {
              "lessThan": "524e0450dd9a396f99a81b045219b0e2ea0dab57",
              "status": "affected",
              "version": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854",
              "versionType": "git"
            },
            {
              "lessThan": "8ddf962c76432a10a6cb80042875cbc48a9c056b",
              "status": "affected",
              "version": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854",
              "versionType": "git"
            },
            {
              "lessThan": "416546cd6a54e9b68f2b91bc680b1ee17dcd77a1",
              "status": "affected",
              "version": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854",
              "versionType": "git"
            },
            {
              "lessThan": "2e8bba0360d1379bfa8da47c8f5dadbb10a3fba1",
              "status": "affected",
              "version": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854",
              "versionType": "git"
            },
            {
              "lessThan": "b5dbb41b212c50c095a4dbee3017a84fe94f033b",
              "status": "affected",
              "version": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/mgmt.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.17"
            },
            {
              "lessThan": "3.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.273",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.224",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.55",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.273",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.224",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.191",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.158",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.112",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.55",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.9",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: mgmt: fix race in read_unconf_index_list()\n\nread_unconf_index_list() counts unconfigured controllers before allocating\nits response, then checks the device flags again while filling it.\n\nhci_dev_list_lock stabilizes list membership, but it does not serialize the\nper-device flags. During asynchronous controller setup, the worker can set\nHCI_UNCONFIGURED and clear HCI_SETUP between the two passes. A controller\nomitted from the allocation count can then become eligible for the fill\npass, causing an out-of-bounds write to rp-\u003eindex[].\n\nAllocate space for every device on hci_dev_list. Since list membership\ncannot change while hci_dev_list_lock is held, the response remains large\nenough regardless of flag transitions. The reported count and response\nlength still include only eligible unconfigured controllers."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - sendmsg() on a local PF_BLUETOOTH/BTPROTO_HCI socket bound to HCI_CHANNEL_CONTROL reaches hci_sock_sendmsg()-\u003ehci_mgmt_cmd()-\u003eread_unconf_index_list(). No over-the-air Bluetooth message supplies this management command or the corrupted data.\nAC:H - The overwrite requires the setup worker to set HCI_UNCONFIGURED and clear HCI_SETUP between read_unconf_index_list()\u0027s sizing and filling walks. An untrusted management-socket caller cannot initiate or synchronize that controller-setup transition, so success depends on external timing.\nPR:L - mgmt_handlers[] marks MGMT_OP_READ_UNCONF_INDEX_LIST with HCI_MGMT_UNTRUSTED, and hci_sock_bind() permits HCI_CHANNEL_CONTROL binding without CAP_NET_ADMIN. Therefore any local user can issue the zero-length command.\nUI:N - The attacker can repeatedly send the management command without another user opening data or approving an operation; asynchronous controller setup is system state rather than required user interaction.\nS:U - The allocation and rp-\u003eindex[] overwrite occur in read_unconf_index_list() within the host kernel heap, and no VM, IOMMU, or other security-authority boundary is crossed.\nC:H - When a newly eligible controller exceeds the allocation basis, rp-\u003eindex[count++] writes 16-bit IDs past the kmalloc buffer and corrupts adjacent kernel heap storage; exploitable heap corruption can expose arbitrary kernel data.\nI:H - rp-\u003eindex[count++] performs an out-of-bounds heap write for each newly eligible controller, allowing adjacent kernel objects to be modified and potentially enabling control-flow hijacking.\nA:H - The out-of-bounds writes can corrupt allocator or adjacent-object state and cause a kernel oops or panic, resulting in complete host availability loss."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:38:14.270Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/fa6f79bb0009406bb11e6912b53ab7c564d6f06b"
        },
        {
          "url": "https://git.kernel.org/stable/c/76dc7e0297f6f7ebefc36a69251e3f4a676d9853"
        },
        {
          "url": "https://git.kernel.org/stable/c/9c32455f490b960efccedd041c7aabb1a04c5cc4"
        },
        {
          "url": "https://git.kernel.org/stable/c/524e0450dd9a396f99a81b045219b0e2ea0dab57"
        },
        {
          "url": "https://git.kernel.org/stable/c/8ddf962c76432a10a6cb80042875cbc48a9c056b"
        },
        {
          "url": "https://git.kernel.org/stable/c/416546cd6a54e9b68f2b91bc680b1ee17dcd77a1"
        },
        {
          "url": "https://git.kernel.org/stable/c/2e8bba0360d1379bfa8da47c8f5dadbb10a3fba1"
        },
        {
          "url": "https://git.kernel.org/stable/c/b5dbb41b212c50c095a4dbee3017a84fe94f033b"
        }
      ],
      "title": "Bluetooth: mgmt: fix race in read_unconf_index_list()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98456",
    "datePublished": "2026-10-18T15:15:05.909Z",
    "dateReserved": "2026-09-25T10:25:14.350Z",
    "dateUpdated": "2026-10-30T12:38:14.270Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
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.

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