{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "a40c20dabdf9045270767c75918feb67f0727c89"
            },
            {
              "fixed": "ae3cf7d2c4d506c5c91746321644e1a08d989e2a"
            },
            {
              "fixed": "5fc5b73109540809b094710fac44da81dd8a3ff8"
            },
            {
              "fixed": "09ea6837a0434fb4db99528a5055b6d822135dcf"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "85e40ba1c4a5246b35e91c2ed69d4680426904d7"
            },
            {
              "last_affected": "59f07434b297e2268f5d5c567db5b09145245cf1"
            },
            {
              "last_affected": "488229b7729d7becf4c39c5e74fb709fb35115c2"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.4.73"
            },
            {
              "fixed": "5.5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.8.17"
            },
            {
              "fixed": "5.9"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.9.2"
            },
            {
              "fixed": "5.10"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.10.0"
            },
            {
              "fixed": "6.12.111"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.53"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97421.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/umem: Be careful about boundary conditions in ib_umem_find_best_pgsz()\n\nSeveral corner cases, especially important on 32 bits:\n\n- umem-\u003eiova is u64, the function argument should pass in u64 or\n  iova will be truncated\n- Check that the length is not too large for the iova\n- Check that lengths \u003e 4G don't overflow the GENMASK",
  "id": "CVE-2026-97421",
  "modified": "2026-09-27T03:30:15.096360827Z",
  "published": "2026-09-24T16:03:31.505Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/09ea6837a0434fb4db99528a5055b6d822135dcf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5fc5b73109540809b094710fac44da81dd8a3ff8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ae3cf7d2c4d506c5c91746321644e1a08d989e2a"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97421.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97421"
    },
    {
      "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": "RDMA/umem: Be careful about boundary conditions in ib_umem_find_best_pgsz()"
}