{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-99244",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.403Z",
        "datePublished": "2026-11-03T11:15:14.715Z",
        "dateUpdated": "2026-11-03T11:15:43.093Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-11-03T11:15:43.093Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npid_namespace: prevent TIF_NOTIFY_SIGNAL from interrupting the reaper\n\nSince commit 7fea700e04bd (\"zap_pid_ns_processes: clear\nTIF_NOTIFY_SIGNAL along with TIF_SIGPENDING\") zap_pid_ns_processes()\nclears TIF_NOTIFY_SIGNAL before every kernel_wait4() call. Otherwise\nkernel_wait4() doesn't sleep and returns -ERESTARTSYS if\nsignal_pending() is true and the reaper busy-waits.\n\nBut clearing TIF_NOTIFY_SIGNAL doesn't fix it. It can get raised again.\nFor example, klp_send_signals() sets it raw against any task that hasn't\ntransitioned yet. And it keeps sending it until the livepatch finishes.\n\nThe sleep loop waiting for pid_allocated to drop has the same problem\nand it doesn't even clear anything. So a schedule() in\nTASK_INTERRUPTIBLE returns immediately.\n\nUse a no_notify_signal guard. signal_pending() will ignore\nTIF_NOTIFY_SIGNAL and the pid namespace reaper sleeps until a child\nexits or free_pid() wakes it."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/pid_namespace.c"
                    ],
                    "versions": [
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                            "version": "edd2754a62bee8d97b4808a15de024f66a1ddccf",
                            "lessThan": "2c20ace1698d03a23467351be1d281e89b36ade3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3466abafa9f4f81a869da828e52a12f693175ec2",
                            "lessThan": "9ab0324f4868eeb20c63f063a1e5bc01d5539212",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7fea700e04bd3f424c2d836e98425782f97b494e",
                            "lessThan": "30b274508c743f243c82904954c4e416d7143d4c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7fea700e04bd3f424c2d836e98425782f97b494e",
                            "lessThan": "70178691c467c8f9f722765299fd8524c3121a35",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7fea700e04bd3f424c2d836e98425782f97b494e",
                            "lessThan": "3d15ac36ce174477efa5365e424dbd47950fd2b9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7fea700e04bd3f424c2d836e98425782f97b494e",
                            "lessThan": "f46cd8241d9b83f2279cc0db3e9d3e181b548a59",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "82c7acf9a12c9b4e4b0aba531de82b4e39a345c8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8e69e589f233ca2c9631f5af2b94f95dfc2ba804",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "09ab5b424b17cfe633db58bb2f9edbaf9484cf20",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.1.95",
                            "lessThan": "6.1.191",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.35",
                            "lessThan": "6.6.161",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.221",
                            "lessThan": "5.11",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.162",
                            "lessThan": "5.16",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.9.6",
                            "lessThan": "6.10",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/pid_namespace.c"
                    ],
                    "versions": [
                        {
                            "version": "6.10",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.10",
                            "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"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1.95",
                                    "versionEndExcluding": "6.1.191"
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/2c20ace1698d03a23467351be1d281e89b36ade3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9ab0324f4868eeb20c63f063a1e5bc01d5539212"
                },
                {
                    "url": "https://git.kernel.org/stable/c/30b274508c743f243c82904954c4e416d7143d4c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/70178691c467c8f9f722765299fd8524c3121a35"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3d15ac36ce174477efa5365e424dbd47950fd2b9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f46cd8241d9b83f2279cc0db3e9d3e181b548a59"
                }
            ],
            "title": "pid_namespace: prevent TIF_NOTIFY_SIGNAL from interrupting the reaper",
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}