{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-99262",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.404Z",
        "datePublished": "2026-11-03T11:48:15.294Z",
        "dateUpdated": "2026-11-03T11:48:15.294Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-11-03T11:48:15.294Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/timeout: don't lose a cancel as io-wq arms a timeout\n\nAn IORING_OP_TIMEOUT run by io-wq, because of IOSQE_ASYNC, has the same\nproblem as poll, futex and waitid. io_wq_submit_work() looks at\nIO_WQ_WORK_CANCEL once, before it issues the request. A cancel in between\nflags the work, gets -EALREADY, and searches ->timeout_list in vain,\nwhile the worker then adds the request and starts the timer:\n\n  io-wq worker                          io_try_cancel()\n  io_wq_submit_work()\n    IO_WQ_WORK_CANCEL isn't set\n                                        io_async_cancel_one()\n                                          sets IO_WQ_WORK_CANCEL\n                                          = -EALREADY\n                                        io_timeout_cancel() = -ENOENT\n    io_timeout()\n      adds the request to ->timeout_list\n      hrtimer_start()\n    = IOU_ISSUE_SKIP_COMPLETE\n\nNobody looks at the flag again, and the timeout runs its course. At ring\nexit, io_uring_try_cancel_requests() cancels io-wq work and then kills\nthe timeouts the same way, so an exiting task can get stuck for the full\nduration of such a timeout.\n\nLook at the flag under ->timeout_lock, which the search takes as well,\nand fail the request if it is set. If the search came first, the flag is\nvisible. If it comes later, it finds the request on the list."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "io_uring/io_uring.h",
                        "io_uring/timeout.c"
                    ],
                    "versions": [
                        {
                            "version": "ce35a47a3a0208a77b4d31b7f2e8ed57d624093d",
                            "lessThan": "f1fabf17f37b252b11d8fe5c70c8056b70b005ca",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ce35a47a3a0208a77b4d31b7f2e8ed57d624093d",
                            "lessThan": "68cd06ba918d9658c36c1973a0184795738dcc46",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ce35a47a3a0208a77b4d31b7f2e8ed57d624093d",
                            "lessThan": "f9d5e02649587885852f46b6dc7c081b87f0ac3a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ce35a47a3a0208a77b4d31b7f2e8ed57d624093d",
                            "lessThan": "f10ab47077e63d6eee35b242c257c3947bb49e64",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ce35a47a3a0208a77b4d31b7f2e8ed57d624093d",
                            "lessThan": "df705a274da10da7bb546e08b49fa80a6ef19c78",
                            "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/io_uring.h",
                        "io_uring/timeout.c"
                    ],
                    "versions": [
                        {
                            "version": "5.6",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.6",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.191",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.161",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.115",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.60",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.14",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "6.1.191"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "6.6.161"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "6.12.115"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "6.18.60"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "7.2.14"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/f1fabf17f37b252b11d8fe5c70c8056b70b005ca"
                },
                {
                    "url": "https://git.kernel.org/stable/c/68cd06ba918d9658c36c1973a0184795738dcc46"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f9d5e02649587885852f46b6dc7c081b87f0ac3a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f10ab47077e63d6eee35b242c257c3947bb49e64"
                },
                {
                    "url": "https://git.kernel.org/stable/c/df705a274da10da7bb546e08b49fa80a6ef19c78"
                }
            ],
            "title": "io_uring/timeout: don't lose a cancel as io-wq arms a timeout",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}