GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

FKIE_CVE-2025-68298

Vulnerability from fkie_nvd - Published: 2025-12-16 16:16 - Updated: 2026-06-17 09:58
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)."
    }
  ],
  "id": "CVE-2025-68298",
  "lastModified": "2026-06-17T09:58:53.627",
  "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.





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.


Detection rules are retrieved from Rulezet.


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.