CVE-2026-99269

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: sched_ext: Wait for SCX_OPSS_DISPATCHING before moving tasks off DSQs A task can be found on a non-local DSQ while the CPU which dispatched it is still running ops.dequeue() and hasn't cleared SCX_OPSS_DISPATCHING. The DSQ consume and move paths don't wait for the dispatch to finish and can operate on the task concurrently with the dispatcher. Call scx_wait_dispatching() in scx_move_local_task_to_local_dsq(), unlink_dsq_and_switch_rq_lock() and move_task_between_dsqs() before they operate on the task. In scx_move_local_task_to_local_dsq(), wait before scx_resolve_local_dsq() as it may update p->scx.flags.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-11-03 12:17:34.117000

Last modified

2026-11-03 12:17:34.117000

View original CVE JSON

{
  "id": "CVE-2026-99269",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-11-03T12:17:34.117",
  "lastModified": "2026-11-03T12:17:34.117",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: Wait for SCX_OPSS_DISPATCHING before moving tasks off DSQs\n\nA task can be found on a non-local DSQ while the CPU which dispatched it\nis still running ops.dequeue() and hasn't cleared SCX_OPSS_DISPATCHING.\nThe DSQ consume and move paths don't wait for the dispatch to finish and\ncan operate on the task concurrently with the dispatcher.\n\nCall scx_wait_dispatching() in scx_move_local_task_to_local_dsq(),\nunlink_dsq_and_switch_rq_lock() and move_task_between_dsqs() before they\noperate on the task. In scx_move_local_task_to_local_dsq(), wait before\nscx_resolve_local_dsq() as it may update p->scx.flags."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "kernel/sched/ext/ext.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "ebf1ccff79c43f860cbd2f9d6cfab9a462d0cb2d",
              "lessThan": "cc2839946328c1618b3870d521b32bb9483d49d0",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "ebf1ccff79c43f860cbd2f9d6cfab9a462d0cb2d",
              "lessThan": "2935062be77113c1c4565ca9d0c72180449aafee",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "kernel/sched/ext/ext.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "7.1",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "7.1",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.14",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/2935062be77113c1c4565ca9d0c72180449aafee",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cc2839946328c1618b3870d521b32bb9483d49d0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}