{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-53321",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-06-09T07:44:35.398Z",
        "datePublished": "2026-06-26T19:41:12.589Z",
        "dateUpdated": "2026-06-26T19:41:12.589Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-06-26T19:41:12.589Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/napi: cap busy_poll_to 10 msec\n\nCurrently there's no cap on the maximum amount of time that napi is\nallowed to poll if no events are found, which can lead to kernel\ncomplaints on a task being stuck as there's no conditional rescheduling\ndone within that loop.\n\nJust cap it to 10 msec in total, that's already way above any kind of\nsane value that will reap any benefits, yet low enough that it's\nnowhere near being able to trigger preemption complaints."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "io_uring/napi.c"
                    ],
                    "versions": [
                        {
                            "version": "8d0c12a80cdeb80d5e0510e96d38fe551ed8e9b5",
                            "lessThan": "39767f944a8c9e696566c37ad5b20131406c4b8d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8d0c12a80cdeb80d5e0510e96d38fe551ed8e9b5",
                            "lessThan": "cb3af525f8dfb8930f0c123e5755fa967a12d5c1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8d0c12a80cdeb80d5e0510e96d38fe551ed8e9b5",
                            "lessThan": "df8599ee18c0e5fe343ffe0b4c379636b8bb839a",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "io_uring/napi.c"
                    ],
                    "versions": [
                        {
                            "version": "6.9",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.9",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.33",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.10",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "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": "6.9",
                                    "versionEndExcluding": "6.18.33"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.9",
                                    "versionEndExcluding": "7.0.10"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.9",
                                    "versionEndExcluding": "7.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/39767f944a8c9e696566c37ad5b20131406c4b8d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cb3af525f8dfb8930f0c123e5755fa967a12d5c1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/df8599ee18c0e5fe343ffe0b4c379636b8bb839a"
                }
            ],
            "title": "io_uring/napi: cap busy_poll_to 10 msec",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}