{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "52a4490e89d7c4effe613d8dffd2ac0a2a786bd7"
            },
            {
              "fixed": "0bfb67ba366cd68d1d0ad935760577bae1d5df27"
            },
            {
              "fixed": "9977321835c7ae71d12a43bed7baa5bd514d01c3"
            },
            {
              "fixed": "0a8c9ed4f166216642a8c084f0de415169c88088"
            },
            {
              "fixed": "d2ee4d47aacbd2ba456092eeec670dba35fde291"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.9.0"
            },
            {
              "fixed": "6.12.104"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.45"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80736.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Fix bandwidth group reservation indexing\n\nValid bandwidth group IDs range from 1 through MAX_GROUPS, while Group\nID 0 is reserved. tb_consumed_dp_bandwidth() uses the Group ID directly\nto index its local group_reserved[] array.\n\nThe array currently has MAX_GROUPS entries, so its valid indices are 0\nthrough MAX_GROUPS - 1. Group ID MAX_GROUPS therefore accesses one\nelement past the end, and the final group's reserved bandwidth is not\nincluded when the array is summed.\n\nGive group_reserved[] MAX_GROUPS + 1 entries so direct Group ID\nindexing covers the reserved ID 0 and valid IDs 1 through MAX_GROUPS.",
  "id": "CVE-2026-80736",
  "modified": "2026-09-05T03:30:30.098568278Z",
  "published": "2026-09-03T08:21:51.946Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0a8c9ed4f166216642a8c084f0de415169c88088"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0bfb67ba366cd68d1d0ad935760577bae1d5df27"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9977321835c7ae71d12a43bed7baa5bd514d01c3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d2ee4d47aacbd2ba456092eeec670dba35fde291"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80736.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80736"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "thunderbolt: Fix bandwidth group reservation indexing"
}