{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2"
            },
            {
              "fixed": "e7c0aa45ae6c5a338661b23812bfcdef50bf3e96"
            },
            {
              "fixed": "cbc2962da99b6b89345267d3aa74b4b573340548"
            },
            {
              "fixed": "9b2e5f1928c99224345a9ed8c5dae5fc74964d6d"
            },
            {
              "fixed": "fc4851ff8dfb505e9a19efcc286712132bbd178d"
            },
            {
              "fixed": "f561e44261344adadf9d6a6dff31e3af9776d5c6"
            },
            {
              "fixed": "aeee917a4878af95f0c63e18c5f22eaf6299c7b8"
            },
            {
              "fixed": "3988cbb1be501dbff909a2ee024670e3c955a66d"
            },
            {
              "fixed": "44c98fd082eafd49d55a8a4077ff488175b2fe24"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.12"
            },
            {
              "fixed": "5.10.270"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.221"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90088.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: RFCOMM: Validate MTU in rfcomm_apply_pn() to prevent infinite loop\n\nrfcomm_apply_pn() accepts the MTU value from a remote PN (Parameter\nNegotiation) frame without checking for zero. When the remote peer\nsends an MTU of zero, d-\u003emtu is set to 0. This causes the sendmsg\npath to enter an infinite loop when fragmenting data, as each fragment\nhas size == min_t(size_t, len, 0) == 0, so the remaining length never\ndecreases. The infinite allocation of zero-length skbs exhausts all\nsystem memory.\n\nFix by clamping d-\u003emtu to RFCOMM_DEFAULT_MTU when the negotiated\nvalue is zero, consistent with the initial value assigned in\nrfcomm_dlc_alloc().",
  "id": "CVE-2026-90088",
  "modified": "2026-09-19T03:30:40.142475532Z",
  "published": "2026-09-17T16:06:03.527Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3988cbb1be501dbff909a2ee024670e3c955a66d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/44c98fd082eafd49d55a8a4077ff488175b2fe24"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9b2e5f1928c99224345a9ed8c5dae5fc74964d6d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aeee917a4878af95f0c63e18c5f22eaf6299c7b8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cbc2962da99b6b89345267d3aa74b4b573340548"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e7c0aa45ae6c5a338661b23812bfcdef50bf3e96"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f561e44261344adadf9d6a6dff31e3af9776d5c6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fc4851ff8dfb505e9a19efcc286712132bbd178d"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90088.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90088"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "Bluetooth: RFCOMM: Validate MTU in rfcomm_apply_pn() to prevent infinite loop"
}