{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-74594",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-15T05:44:03.919Z",
        "datePublished": "2026-08-22T15:31:44.894Z",
        "dateUpdated": "2026-08-22T15:31:44.894Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-22T15:31:44.894Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched/psi: Shut down rtpoll_timer in psi_cgroup_free()\n\npsi_schedule_rtpoll_work() is called locklessly from the scheduler hotpath\nand can race psi_trigger_destroy() taking down the last rtpoll trigger under\nrtpoll_trigger_lock:\n\n  psi_schedule_rtpoll_work()        psi_trigger_destroy()\n\n  rcu_read_lock();\n  task = rcu_dereference(rtpoll_task);\n                                    rcu_assign_pointer(rtpoll_task, NULL);\n                                    timer_delete(&rtpoll_timer);\n  mod_timer(&rtpoll_timer, ...);\n  rcu_read_unlock();\n                                    synchronize_rcu();\n                                    kthread_stop(task_to_destroy);\n\nThe group can then be freed with the re-armed timer still pending, and\npoll_timer_fn() runs on freed memory.\n\n461daba06bdc (\"psi: eliminate kthread_worker from psi trigger scheduling\nmechanism\") deleted the timer synchronously after the synchronize_rcu(),\nwhich prevented this but raced trigger creation instead: the deletion could\ncancel the timer that a new trigger set armed during the grace period and,\nas creation also reinitialized the timer at the time, corrupt it.\n8f91efd870ea (\"psi: Fix race between psi_trigger_create/destroy\") moved the\ninitialization into group_init() and the deletion into the locked section,\ntrading the creation races for the window above.\n\nNeither placement in the destruction path works. A pending timer firing\nwhile the group is alive is harmless though. poll_timer_fn() just wakes the\nrtpoll waitqueue and doesn't re-arm itself. Bind the timer to the group's\nlifetime instead and shut it down in psi_cgroup_free(). Nothing can arm it\nby then. timer_shutdown_sync() because the timer is never armed again."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/sched/psi.c"
                    ],
                    "versions": [
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                            "version": "8f91efd870ea5d8bc10b0fcc9740db51cd4c0c83",
                            "lessThan": "1e5ca82eee59caca6988f9d6e859786aab8a5fa0",
                            "status": "affected",
                            "versionType": "git"
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                            "lessThan": "310b5a537a78c358a4cd244bd767c1a517a05459",
                            "status": "affected",
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                            "lessThan": "806fcff98c1d7cb3c1dc0015e55ebdbe819e6b08",
                            "status": "affected",
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                        },
                        {
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                            "lessThan": "8037c5b2b2a447df52542f4d8535895d837bdcbd",
                            "status": "affected",
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                        },
                        {
                            "version": "8f91efd870ea5d8bc10b0fcc9740db51cd4c0c83",
                            "lessThan": "611e7821c4f83a671455658797336faecc3a5196",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8f91efd870ea5d8bc10b0fcc9740db51cd4c0c83",
                            "lessThan": "5457025fa8ca3c0d2732109513de839e3e797190",
                            "status": "affected",
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                        {
                            "version": "6bfcb6178925b1fd28c102e53d403091b8f49396",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e1e5e263bbe0e6e9c3db36aa48a3c8acf546fa49",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "979965c33f734a1666af67900408f997ac669c23",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.10.50",
                            "lessThan": "5.11",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.12.17",
                            "lessThan": "5.13",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.13.2",
                            "lessThan": "5.14",
                            "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/sched/psi.c"
                    ],
                    "versions": [
                        {
                            "version": "5.14",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.14",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.183",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.152",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.104",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.45",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.9",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/1e5ca82eee59caca6988f9d6e859786aab8a5fa0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/310b5a537a78c358a4cd244bd767c1a517a05459"
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                },
                {
                    "url": "https://git.kernel.org/stable/c/5457025fa8ca3c0d2732109513de839e3e797190"
                }
            ],
            "title": "sched/psi: Shut down rtpoll_timer in psi_cgroup_free()",
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