Vulnerability-Lookup

GHSA-GHF3-W254-J47X

Vulnerability from github – Published: 2026-08-10 15:33 – Updated: 2026-08-14 00:31

Details

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

Bluetooth: hci_qca: Clear memdump state on invalid dump size

qca_controller_memdump() allocates qca->qca_memdump before processing the first dump packet. For a sequence-zero packet it then disables IBS, marks memdump collection active, and reads the advertised dump size.

If the controller reports a zero dump size, the error path frees the local qca_memdump object and returns without clearing qca->qca_memdump or undoing the collection state. A later memdump work item initializes its local pointer from qca->qca_memdump and skips allocation when that pointer is non-NULL, so it can operate on freed memory. The stale collection and IBS-disabled flags can also leave waiters or later transmit handling blocked behind an aborted dump.

Clear the saved pointer and memdump state before returning from the invalid-size path, matching the cleanup used when hci_devcd_init() fails.

A static analysis checker reported the stale memdump state, and manual source review confirmed the invalid-size failure path.

Severity

8.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-68389"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T13:20:32Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_qca: Clear memdump state on invalid dump size\n\nqca_controller_memdump() allocates qca-\u003eqca_memdump before processing\nthe first dump packet. For a sequence-zero packet it then disables IBS,\nmarks memdump collection active, and reads the advertised dump size.\n\nIf the controller reports a zero dump size, the error path frees the\nlocal qca_memdump object and returns without clearing qca-\u003eqca_memdump\nor undoing the collection state. A later memdump work item initializes\nits local pointer from qca-\u003eqca_memdump and skips allocation when that\npointer is non-NULL, so it can operate on freed memory. The stale\ncollection and IBS-disabled flags can also leave waiters or later\ntransmit handling blocked behind an aborted dump.\n\nClear the saved pointer and memdump state before returning from the\ninvalid-size path, matching the cleanup used when hci_devcd_init() fails.\n\nA static analysis checker reported the stale memdump state, and manual\nsource review confirmed the invalid-size failure path.",
  "id": "GHSA-ghf3-w254-j47x",
  "modified": "2026-08-14T00:31:57Z",
  "published": "2026-08-10T15:33:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68389"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/069258d5111eed9ac9586bee42d03d38e2975715"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2363a757694752426fc47f3eadde15cf5f791fa5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a3945e8dea6c9a8ec9e981169ac9487e1d6ad6a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bf587a10c33e5571a299742e45bc18960b9912e7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cefb44c367b2b52e50f97bc8526d39df9bcf5e60"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-68389 (GCVE-0-2026-68389)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:04 – Updated: 2026-08-13 22:44

Title

Bluetooth: hci_qca: Clear memdump state on invalid dump size

Summary

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_qca: Clear memdump state on invalid dump size qca_controller_memdump() allocates qca->qca_memdump before processing the first dump packet. For a sequence-zero packet it then disables IBS, marks memdump collection active, and reads the advertised dump size. If the controller reports a zero dump size, the error path frees the local qca_memdump object and returns without clearing qca->qca_memdump or undoing the collection state. A later memdump work item initializes its local pointer from qca->qca_memdump and skips allocation when that pointer is non-NULL, so it can operate on freed memory. The stale collection and IBS-disabled flags can also leave waiters or later transmit handling blocked behind an aborted dump. Clear the saved pointer and memdump state before returning from the invalid-size path, matching the cleanup used when hci_devcd_init() fails. A static analysis checker reported the stale memdump state, and manual source review confirmed the invalid-size failure path.

Severity

8.8 (High)


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

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/5a3945e8dea6c9a8e…
https://git.kernel.org/stable/c/069258d5111eed9ac…
https://git.kernel.org/stable/c/cefb44c367b2b52e5…
https://git.kernel.org/stable/c/2363a757694752426…
https://git.kernel.org/stable/c/bf587a10c33e5571a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 06d3fdfcdf5cefb06f2024b9d3dad356779399cf , < 5a3945e8dea6c9a8ec9e981169ac9487e1d6ad6a (git) Affected: 06d3fdfcdf5cefb06f2024b9d3dad356779399cf , < 069258d5111eed9ac9586bee42d03d38e2975715 (git) Affected: 06d3fdfcdf5cefb06f2024b9d3dad356779399cf , < cefb44c367b2b52e50f97bc8526d39df9bcf5e60 (git) Affected: 06d3fdfcdf5cefb06f2024b9d3dad356779399cf , < 2363a757694752426fc47f3eadde15cf5f791fa5 (git) Affected: 06d3fdfcdf5cefb06f2024b9d3dad356779399cf , < bf587a10c33e5571a299742e45bc18960b9912e7 (git)
Linux	Linux	Affected: 6.6 Unaffected: 0 , < 6.6 (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.101 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2-rc4 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/bluetooth/hci_qca.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5a3945e8dea6c9a8ec9e981169ac9487e1d6ad6a",
              "status": "affected",
              "version": "06d3fdfcdf5cefb06f2024b9d3dad356779399cf",
              "versionType": "git"
            },
            {
              "lessThan": "069258d5111eed9ac9586bee42d03d38e2975715",
              "status": "affected",
              "version": "06d3fdfcdf5cefb06f2024b9d3dad356779399cf",
              "versionType": "git"
            },
            {
              "lessThan": "cefb44c367b2b52e50f97bc8526d39df9bcf5e60",
              "status": "affected",
              "version": "06d3fdfcdf5cefb06f2024b9d3dad356779399cf",
              "versionType": "git"
            },
            {
              "lessThan": "2363a757694752426fc47f3eadde15cf5f791fa5",
              "status": "affected",
              "version": "06d3fdfcdf5cefb06f2024b9d3dad356779399cf",
              "versionType": "git"
            },
            {
              "lessThan": "bf587a10c33e5571a299742e45bc18960b9912e7",
              "status": "affected",
              "version": "06d3fdfcdf5cefb06f2024b9d3dad356779399cf",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/bluetooth/hci_qca.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.148",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.101",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.42",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.6",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2-rc4",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_qca: Clear memdump state on invalid dump size\n\nqca_controller_memdump() allocates qca-\u003eqca_memdump before processing\nthe first dump packet. For a sequence-zero packet it then disables IBS,\nmarks memdump collection active, and reads the advertised dump size.\n\nIf the controller reports a zero dump size, the error path frees the\nlocal qca_memdump object and returns without clearing qca-\u003eqca_memdump\nor undoing the collection state. A later memdump work item initializes\nits local pointer from qca-\u003eqca_memdump and skips allocation when that\npointer is non-NULL, so it can operate on freed memory. The stale\ncollection and IBS-disabled flags can also leave waiters or later\ntransmit handling blocked behind an aborted dump.\n\nClear the saved pointer and memdump state before returning from the\ninvalid-size path, matching the cleanup used when hci_devcd_init() fails.\n\nA static analysis checker reported the stale memdump state, and manual\nsource review confirmed the invalid-size failure path."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - The vulnerable memdump packets arrive as QCA vendor HCI events (QCA_SSR_DUMP_HANDLE) emitted by the Bluetooth controller after a firmware crash/SSR, a state a nearby attacker induces or controls by attacking QCA controller firmware over the radio link, matching the CNA convention of scoring controller-event-driven Bluetooth driver bugs as Adjacent.\nAC:L - An attacker controlling the controller-to-host HCI stream deterministically triggers the flaw by sending a sequence-0 memdump packet with dump_size 0 followed by any further memdump packet; there is no race and no attacker-uncontrollable timing or memory-layout precondition.\nPR:N - No host credentials or authentication are needed: the memdump event is consumed unconditionally by qca_recv_event() on the driver receive path with no pairing, bonding, or capability check before qca_controller_memdump() runs.\nUI:N - SSR/memdump handling is fully automatic \u2014 qca_controller_memdump_event() queues the work item on receipt, so no local user has to open, mount, or confirm anything.\nS:U - The dangling pointer, use-after-free writes, and double free all occur in the host kernel\u0027s own heap and authority; no VM escape, IOMMU bypass, or sandbox boundary is crossed.\nC:H - The stale qca-\u003eqca_memdump gives a use-after-free on a kmalloc-16 object that an attacker can reclaim with another kernel allocation, and the freed fields (received_dump/ram_dump_size) then drive hci_devcd_append() length arithmetic, yielding attacker-influenced kernel memory disclosure per UAF exploitation.\nI:H - The reused freed object receives attacker-supplied 32-bit values (ram_dump_size straight from the packet, plus current_seq_no/received_dump) and is later kfree()d again, providing a controlled heap write and double-free primitive usable for arbitrary write and control-flow hijack.\nA:H - Beyond the use-after-free/double-free oops (KASAN slab-use-after-free), the uncleared QCA_MEMDUMP_COLLECTION and QCA_IBS_DISABLED flags leave wait_on_bit_timeout() waiters and the IBS transmit path stalled behind an aborted dump, persistently wedging the Bluetooth device."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-13T22:44:17.329Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5a3945e8dea6c9a8ec9e981169ac9487e1d6ad6a"
        },
        {
          "url": "https://git.kernel.org/stable/c/069258d5111eed9ac9586bee42d03d38e2975715"
        },
        {
          "url": "https://git.kernel.org/stable/c/cefb44c367b2b52e50f97bc8526d39df9bcf5e60"
        },
        {
          "url": "https://git.kernel.org/stable/c/2363a757694752426fc47f3eadde15cf5f791fa5"
        },
        {
          "url": "https://git.kernel.org/stable/c/bf587a10c33e5571a299742e45bc18960b9912e7"
        }
      ],
      "title": "Bluetooth: hci_qca: Clear memdump state on invalid dump size",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68389",
    "datePublished": "2026-08-10T12:04:08.306Z",
    "dateReserved": "2026-07-30T09:28:09.388Z",
    "dateUpdated": "2026-08-13T22:44:17.329Z",
    "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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

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GHSA-GHF3-W254-J47X

CVE-2026-68389 (GCVE-0-2026-68389)

Tags

Sightings

Nomenclature