{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-89604",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-11T19:38:34.733Z",
        "datePublished": "2026-09-11T19:45:07.365Z",
        "dateUpdated": "2026-10-19T08:49:35.476Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T08:49:35.476Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/efivarfs/super.c"
                    ],
                    "versions": [
                        {
                            "version": "115409cbb6a296d73702a62c54c5b1b11cb88b3d",
                            "lessThan": "97d71ebee48cd1b29091762b3e5cca4f815dd84c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d86ff3333cb1d5f42d8898fb5fdb304e143c0237",
                            "lessThan": "3cd611c9f1dbcc116c8af5112e3c1783c8cde2ae",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d86ff3333cb1d5f42d8898fb5fdb304e143c0237",
                            "lessThan": "8953bdd1b9c0e748d5408d3d0b8e7aeee5c9cd41",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d86ff3333cb1d5f42d8898fb5fdb304e143c0237",
                            "lessThan": "92895a14329cc9533e2a74a265214f690ba3851a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d86ff3333cb1d5f42d8898fb5fdb304e143c0237",
                            "lessThan": "0dbc2e94b81df5a1264068b6ed3605c654b8afcb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d86ff3333cb1d5f42d8898fb5fdb304e143c0237",
                            "lessThan": "b2326338dc683e8c1067c0cbf7a47986c4190902",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.1.178",
                            "lessThan": "6.1.188",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/efivarfs/super.c"
                    ],
                    "versions": [
                        {
                            "version": "6.5",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.5",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.188",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.157",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.109",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.50",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.4",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1.178",
                                    "versionEndExcluding": "6.1.188"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.5",
                                    "versionEndExcluding": "6.6.157"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.5",
                                    "versionEndExcluding": "6.12.109"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.5",
                                    "versionEndExcluding": "6.18.50"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.5",
                                    "versionEndExcluding": "7.2.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.5",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/97d71ebee48cd1b29091762b3e5cca4f815dd84c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3cd611c9f1dbcc116c8af5112e3c1783c8cde2ae"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8953bdd1b9c0e748d5408d3d0b8e7aeee5c9cd41"
                },
                {
                    "url": "https://git.kernel.org/stable/c/92895a14329cc9533e2a74a265214f690ba3851a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0dbc2e94b81df5a1264068b6ed3605c654b8afcb"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b2326338dc683e8c1067c0cbf7a47986c4190902"
                }
            ],
            "title": "efivarfs: Rate limit statfs() handler",
            "x_generator": {
                "engine": "bippy-1.2.0"
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    }
}