{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "afd2daa26c7abd734d78bd274fc6c59a15e61063"
            },
            {
              "fixed": "fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e"
            },
            {
              "fixed": "d08c99abf06133a7829d46627e77e3315ca974d2"
            },
            {
              "fixed": "0e388d805233a883a31271676eae6031dfc9e898"
            },
            {
              "fixed": "54e9387eb7546eaa6f600220599d55740956ffc3"
            },
            {
              "fixed": "be1e3df2c49c91b0a052c6563884e8d39bd768b2"
            },
            {
              "fixed": "84ea9c99874804f5ca13f35bbc186ba93902f30f"
            },
            {
              "fixed": "502adc06ba76dee19c292ae4a07d74d202fe734d"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.13.0"
            },
            {
              "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-2026-90257.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: virtio_bt: avoid OOB read of build info string\n\nThe virtbt_setup_zephyr() sends the Zephyr vendor command 0xfc08 (Read\nBuild Information) and hands the response to bt_dev_info() and\nhci_set_fw_info() as a \"%s\" string starting at skb-\u003edata + 1, without\nchecking the length. A backend that answers with status only leaves that\npointer past the end of the received data, so the walk reads adjacent\nslab memory until it meets a NUL. Those bytes reach the kernel log and\nthe firmware-info debugfs file.\n\nTo fix this, print the string with a bounded \"%.*s\" limited to\nskb-\u003elen - 1. A short or unterminated response then prints as much as\narrived instead of failing setup.\n\nThis mirrors commit dd068ef04412 (\"Bluetooth: bpa10x: avoid OOB read of\nrevision string in bpa10x_setup()\"), which fixed the identical pattern.",
  "id": "CVE-2026-90257",
  "modified": "2026-09-19T03:30:34.006797921Z",
  "published": "2026-09-17T16:07:56.089Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0e388d805233a883a31271676eae6031dfc9e898"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/502adc06ba76dee19c292ae4a07d74d202fe734d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/54e9387eb7546eaa6f600220599d55740956ffc3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/84ea9c99874804f5ca13f35bbc186ba93902f30f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/be1e3df2c49c91b0a052c6563884e8d39bd768b2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d08c99abf06133a7829d46627e77e3315ca974d2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90257.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90257"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "Bluetooth: virtio_bt: avoid OOB read of build info string"
}