{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "6bfcb6178925b1fd28c102e53d403091b8f49396"
            },
            {
              "fixed": "4addb102154b7cf6e2310ccbe20c3c08619e520d"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "8f91efd870ea5d8bc10b0fcc9740db51cd4c0c83"
            },
            {
              "fixed": "894a9300d7fb2e2951da92e565ae6de7ddfb0a69"
            },
            {
              "fixed": "1e5ca82eee59caca6988f9d6e859786aab8a5fa0"
            },
            {
              "fixed": "310b5a537a78c358a4cd244bd767c1a517a05459"
            },
            {
              "fixed": "806fcff98c1d7cb3c1dc0015e55ebdbe819e6b08"
            },
            {
              "fixed": "8037c5b2b2a447df52542f4d8535895d837bdcbd"
            },
            {
              "fixed": "611e7821c4f83a671455658797336faecc3a5196"
            },
            {
              "fixed": "5457025fa8ca3c0d2732109513de839e3e797190"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "e1e5e263bbe0e6e9c3db36aa48a3c8acf546fa49"
            },
            {
              "last_affected": "979965c33f734a1666af67900408f997ac669c23"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.10.50"
            },
            {
              "fixed": "5.10.266"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.12.17"
            },
            {
              "fixed": "5.13"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.13.2"
            },
            {
              "fixed": "5.14"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.10.266"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.217"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.14.0"
            },
            {
              "fixed": "6.1.183"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.6.152"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.12.104"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.18.45"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "7.1.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74594.json"
  },
  "details": "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(\u0026rtpoll_timer);\n  mod_timer(\u0026rtpoll_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.",
  "id": "CVE-2026-74594",
  "modified": "2026-08-27T11:30:49.253245708Z",
  "published": "2026-08-22T15:31:44.894Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1e5ca82eee59caca6988f9d6e859786aab8a5fa0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/310b5a537a78c358a4cd244bd767c1a517a05459"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4addb102154b7cf6e2310ccbe20c3c08619e520d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5457025fa8ca3c0d2732109513de839e3e797190"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/611e7821c4f83a671455658797336faecc3a5196"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8037c5b2b2a447df52542f4d8535895d837bdcbd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/806fcff98c1d7cb3c1dc0015e55ebdbe819e6b08"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/894a9300d7fb2e2951da92e565ae6de7ddfb0a69"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74594.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74594"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "sched/psi: Shut down rtpoll_timer in psi_cgroup_free()"
}