{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "ebf1ccff79c43f860cbd2f9d6cfab9a462d0cb2d"
            },
            {
              "fixed": "fe499ae9da46e297f578d4346c4c8e338c3118db"
            },
            {
              "fixed": "cb86607ada73185f321baa7f9d94a08a3a40bbf5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.1.0"
            },
            {
              "fixed": "7.2.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98865.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: Don't run ops.dequeue() with a DSQ lock held\n\nops.dequeue() is invoked with the source user DSQ's lock still held on\nthe consume and move paths (scx_consume_dispatch_q(),\nmove_task_between_dsqs()). A BPF scheduler which locks the source user\nDSQ from ops.dequeue() - e.g. by iterating it with bpf_iter_scx_dsq -\nself-deadlocks.\n\nops.dequeue() can only call the \"any\" kfuncs and none of them can lock a\nbuiltin DSQ, so the global and bypass paths can't deadlock; however,\nall DSQ locks share one lockdep class, so iterating any user DSQ from\nops.dequeue() on those paths trips the recursion check.\n\nMove the invocation after the DSQ unlock on all three paths.\nSCX_TASK_IN_CUSTODY is cleared under the lock serializing the transfer\nso that the callback is invoked exactly once.",
  "id": "CVE-2026-98865",
  "modified": "2026-10-19T02:30:53.252192011Z",
  "published": "2026-10-18T15:51:26.449Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cb86607ada73185f321baa7f9d94a08a3a40bbf5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe499ae9da46e297f578d4346c4c8e338c3118db"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98865.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98865"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "sched_ext: Don't run ops.dequeue() with a DSQ lock held"
}