{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-99263",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.404Z",
        "datePublished": "2026-11-03T11:48:15.743Z",
        "dateUpdated": "2026-11-03T19:13:17.237Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-11-03T19:13:17.237Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/poll: avoid retry wakeup loss when dropping ownership\n\nIf a wakeup sets IO_POLL_RETRY_FLAG between the owning task consuming\nthe existing instance of IO_POLL_RETRY_FLAG and the loop check\nof io_poll_check_events(), then we stall on processing the request\nuntil an unrelated wakeup comes along.\n\nUsing atomic_cmpxchg instead of atomic_sub_return to guarantee both the\ncount v and poll_refs are 0 and no wake-ups are missed."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "io_uring/poll.c"
                    ],
                    "versions": [
                        {
                            "version": "a26a35e9019fd70bf3cf647dcfdae87abc7bacea",
                            "lessThan": "d1f6850086ac6f8b0fa44fb19aa2a468c73ee071",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "a26a35e9019fd70bf3cf647dcfdae87abc7bacea",
                            "lessThan": "41fae2e9e1fa3bee86aee0a25ba90e59ce5024bf",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "a26a35e9019fd70bf3cf647dcfdae87abc7bacea",
                            "lessThan": "4ef685b8505615729d75c875f52822238bf76ca6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "a26a35e9019fd70bf3cf647dcfdae87abc7bacea",
                            "lessThan": "afa407c02f3aa0fd872f86c9bf1b34502e0fa8f0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "a26a35e9019fd70bf3cf647dcfdae87abc7bacea",
                            "lessThan": "eb2a50d8235e4580fea9aa20f3fbe1a002c38cb1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "a26a35e9019fd70bf3cf647dcfdae87abc7bacea",
                            "lessThan": "521e8a65e9b45532295ba1082ef12be6e80c173b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "a26a35e9019fd70bf3cf647dcfdae87abc7bacea",
                            "lessThan": "937d38dcacd675dc0572d6c9b6743960df3128ed",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4b702b7d11ce1b9d26fc6d7c5a7ef4ac1d455048",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bc4e6ee16778149811333a969a7a893d4cc110c5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.15.82",
                            "lessThan": "5.16",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.0.11",
                            "lessThan": "6.1",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "io_uring/poll.c"
                    ],
                    "versions": [
                        {
                            "version": "6.1",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.1",
                            "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"
                        },
                        {
                            "version": "7.3.1",
                            "lessThanOrEqual": "7.3.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.4-rc1",
                            "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",
                                    "versionEndExcluding": "6.1.191"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1",
                                    "versionEndExcluding": "6.6.161"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1",
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                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1",
                                    "versionEndExcluding": "6.18.60"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1",
                                    "versionEndExcluding": "7.2.14"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1",
                                    "versionEndExcluding": "7.3.1"
                                },
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1",
                                    "versionEndExcluding": "7.4-rc1"
                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15.82"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.0.11"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/d1f6850086ac6f8b0fa44fb19aa2a468c73ee071"
                },
                {
                    "url": "https://git.kernel.org/stable/c/41fae2e9e1fa3bee86aee0a25ba90e59ce5024bf"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4ef685b8505615729d75c875f52822238bf76ca6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/afa407c02f3aa0fd872f86c9bf1b34502e0fa8f0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/eb2a50d8235e4580fea9aa20f3fbe1a002c38cb1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/521e8a65e9b45532295ba1082ef12be6e80c173b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/937d38dcacd675dc0572d6c9b6743960df3128ed"
                }
            ],
            "title": "io_uring/poll: avoid retry wakeup loss when dropping ownership",
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                "engine": "bippy-1.2.0"
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}