{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "115409cbb6a296d73702a62c54c5b1b11cb88b3d"
            },
            {
              "fixed": "97d71ebee48cd1b29091762b3e5cca4f815dd84c"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "d86ff3333cb1d5f42d8898fb5fdb304e143c0237"
            },
            {
              "fixed": "3cd611c9f1dbcc116c8af5112e3c1783c8cde2ae"
            },
            {
              "fixed": "8953bdd1b9c0e748d5408d3d0b8e7aeee5c9cd41"
            },
            {
              "fixed": "92895a14329cc9533e2a74a265214f690ba3851a"
            },
            {
              "fixed": "0dbc2e94b81df5a1264068b6ed3605c654b8afcb"
            },
            {
              "fixed": "b2326338dc683e8c1067c0cbf7a47986c4190902"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.1.178"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.5.0"
            },
            {
              "fixed": "6.12.109"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.18.50"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "7.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89604.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nefivarfs: Rate limit statfs() handler\n\nRavi reports that statfs() may be called by unprivileged users on the\nefivarfs mount point, which may result in a flood of calls to the\nQueryVariableInfo() runtime service. These calls are disproportionately\ncostly on x86 systems where the variable store is backed by SMM, as each\nSMM entry requires a rendez-vous of all the CPUs.\n\nSo rate limit the calls to QueryVariableInfo() at twice per second, and\nreturn the most recently obtained value for calls that are elided.",
  "id": "CVE-2026-89604",
  "modified": "2026-09-15T03:31:09.690430323Z",
  "published": "2026-09-11T19:45:07.365Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0dbc2e94b81df5a1264068b6ed3605c654b8afcb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3cd611c9f1dbcc116c8af5112e3c1783c8cde2ae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8953bdd1b9c0e748d5408d3d0b8e7aeee5c9cd41"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/92895a14329cc9533e2a74a265214f690ba3851a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/97d71ebee48cd1b29091762b3e5cca4f815dd84c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b2326338dc683e8c1067c0cbf7a47986c4190902"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89604.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89604"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "efivarfs: Rate limit statfs() handler"
}