FKIE_CVE-2026-23395

Vulnerability from fkie_nvd - Published: 2026-03-25 11:16 - Updated: 2026-03-25 15:41
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix accepting multiple L2CAP_ECRED_CONN_REQ Currently the code attempts to accept requests regardless of the command identifier which may cause multiple requests to be marked as pending (FLAG_DEFER_SETUP) which can cause more than L2CAP_ECRED_MAX_CID(5) to be allocated in l2cap_ecred_rsp_defer causing an overflow. The spec is quite clear that the same identifier shall not be used on subsequent requests: 'Within each signaling channel a different Identifier shall be used for each successive request or indication.' https://www.bluetooth.com/wp-content/uploads/Files/Specification/HTML/Core-62/out/en/host/logical-link-control-and-adaptation-protocol-specification.html#UUID-32a25a06-4aa4-c6c7-77c5-dcfe3682355d So this attempts to check if there are any channels pending with the same identifier and rejects if any are found.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2124d82fd25e1671bb3ceb37998af5aae5903e06
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5b3e2052334f2ff6d5200e952f4aa66994d09899
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6b949a6b33cbdf621d9fc6f0c48ac00915dbf514
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8d0d94f8ba5b3a0beec3b0da558b9bea48018117
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e72ee455297b794b852e5cea8d2d7bb17312172a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fb4a3a26483f3ea2cd21c7a2f7c45d5670600465
Impacted products
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix accepting multiple L2CAP_ECRED_CONN_REQ\n\nCurrently the code attempts to accept requests regardless of the\ncommand identifier which may cause multiple requests to be marked\nas pending (FLAG_DEFER_SETUP) which can cause more than\nL2CAP_ECRED_MAX_CID(5) to be allocated in l2cap_ecred_rsp_defer\ncausing an overflow.\n\nThe spec is quite clear that the same identifier shall not be used on\nsubsequent requests:\n\n\u0027Within each signaling channel a different Identifier shall be used\nfor each successive request or indication.\u0027\nhttps://www.bluetooth.com/wp-content/uploads/Files/Specification/HTML/Core-62/out/en/host/logical-link-control-and-adaptation-protocol-specification.html#UUID-32a25a06-4aa4-c6c7-77c5-dcfe3682355d\n\nSo this attempts to check if there are any channels pending with the\nsame identifier and rejects if any are found."
    }
  ],
  "id": "CVE-2026-23395",
  "lastModified": "2026-03-25T15:41:33.977",
  "metrics": {},
  "published": "2026-03-25T11:16:40.347",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2124d82fd25e1671bb3ceb37998af5aae5903e06"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5b3e2052334f2ff6d5200e952f4aa66994d09899"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6b949a6b33cbdf621d9fc6f0c48ac00915dbf514"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8d0d94f8ba5b3a0beec3b0da558b9bea48018117"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e72ee455297b794b852e5cea8d2d7bb17312172a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fb4a3a26483f3ea2cd21c7a2f7c45d5670600465"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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