FKIE_CVE-2025-68298

Vulnerability from fkie_nvd - Published: 2025-12-16 16:16 - Updated: 2026-10-14 16:10
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btusb: mediatek: Avoid btusb_mtk_claim_iso_intf() NULL deref In btusb_mtk_setup(), we set `btmtk_data->isopkt_intf` to: usb_ifnum_to_if(data->udev, MTK_ISO_IFNUM) That function can return NULL in some cases. Even when it returns NULL, though, we still go on to call btusb_mtk_claim_iso_intf(). As of commit e9087e828827 ("Bluetooth: btusb: mediatek: Add locks for usb_driver_claim_interface()"), calling btusb_mtk_claim_iso_intf() when `btmtk_data->isopkt_intf` is NULL will cause a crash because we'll end up passing a bad pointer to device_lock(). Prior to that commit we'd pass the NULL pointer directly to usb_driver_claim_interface() which would detect it and return an error, which was handled. Resolve the crash in btusb_mtk_claim_iso_intf() by adding a NULL check at the start of the function. This makes the code handle a NULL `btmtk_data->isopkt_intf` the same way it did before the problematic commit (just with a slight change to the error message printed).
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2fa09fe98ca3b114d66285f65f7e108fea131815
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c3b990e0b23068da65f0004cd38ee31f43f36460
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c884a0b27b4586e607431d86a1aa0bb4fb39169c
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/bluetooth/btusb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2fa09fe98ca3b114d66285f65f7e108fea131815",
              "status": "affected",
              "version": "930e1790b99e5839e1af69d2f7fd808f1fba2df9",
              "versionType": "git"
            },
            {
              "lessThan": "c3b990e0b23068da65f0004cd38ee31f43f36460",
              "status": "affected",
              "version": "e9087e828827e5a5c85e124ce77503f2b81c3491",
              "versionType": "git"
            },
            {
              "lessThan": "c884a0b27b4586e607431d86a1aa0bb4fb39169c",
              "status": "affected",
              "version": "e9087e828827e5a5c85e124ce77503f2b81c3491",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4194766ec8756f4f654d595ae49962acbac49490",
              "versionType": "git"
            },
            {
              "lessThan": "6.12.61",
              "status": "affected",
              "version": "6.12.13",
              "versionType": "semver"
            },
            {
              "lessThan": "6.14",
              "status": "affected",
              "version": "6.13.2",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/bluetooth/btusb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "lessThan": "6.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.61",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btusb: mediatek: Avoid btusb_mtk_claim_iso_intf() NULL deref\n\nIn btusb_mtk_setup(), we set `btmtk_data-\u003eisopkt_intf` to:\n  usb_ifnum_to_if(data-\u003eudev, MTK_ISO_IFNUM)\n\nThat function can return NULL in some cases. Even when it returns\nNULL, though, we still go on to call btusb_mtk_claim_iso_intf().\n\nAs of commit e9087e828827 (\"Bluetooth: btusb: mediatek: Add locks for\nusb_driver_claim_interface()\"), calling btusb_mtk_claim_iso_intf()\nwhen `btmtk_data-\u003eisopkt_intf` is NULL will cause a crash because\nwe\u0027ll end up passing a bad pointer to device_lock(). Prior to that\ncommit we\u0027d pass the NULL pointer directly to\nusb_driver_claim_interface() which would detect it and return an\nerror, which was handled.\n\nResolve the crash in btusb_mtk_claim_iso_intf() by adding a NULL check\nat the start of the function. This makes the code handle a NULL\n`btmtk_data-\u003eisopkt_intf` the same way it did before the problematic\ncommit (just with a slight change to the error message printed)."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nBluetooth: btusb: mediatek: Evitar la desreferencia NULL de btusb_mtk_claim_iso_intf()\n\nEn btusb_mtk_setup(), establecemos btmtk_data -\u003e isopkt_intf a:\n  usb_ifnum_to_if(data -\u003e udev, MTK_ISO_IFNUM)\n\nEsa funci\u00f3n puede devolver NULL en algunos casos. Sin embargo, incluso cuando devuelve NULL, seguimos llamando a btusb_mtk_claim_iso_intf().\n\nA partir del commit e9087e828827 (\u0027Bluetooth: btusb: mediatek: A\u00f1adir bloqueos para usb_driver_claim_interface()\u0027), llamar a btusb_mtk_claim_iso_intf() cuando btmtk_data -\u003e isopkt_intf es NULL causar\u00e1 un fallo porque terminaremos pasando un puntero incorrecto a device_lock(). Antes de ese commit, pasar\u00edamos el puntero NULL directamente a usb_driver_claim_interface(), que lo detectar\u00eda y devolver\u00eda un error, el cual era manejado.\n\nResolver el fallo en btusb_mtk_claim_iso_intf() a\u00f1adiendo una comprobaci\u00f3n de NULL al inicio de la funci\u00f3n. Esto hace que el c\u00f3digo maneje un btmtk_data -\u003e isopkt_intf NULL de la misma manera que lo hac\u00eda antes del commit problem\u00e1tico (solo con un ligero cambio en el mensaje de error impreso)."
    }
  ],
  "id": "CVE-2025-68298",
  "lastModified": "2026-10-14T16:10:00.250",
  "metrics": {},
  "published": "2025-12-16T16:16:08.760",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2fa09fe98ca3b114d66285f65f7e108fea131815"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c3b990e0b23068da65f0004cd38ee31f43f36460"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c884a0b27b4586e607431d86a1aa0bb4fb39169c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.