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CVE-2026-93150

Estado: RecibidaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

cgroup/cpuset: Make nr_deadline_tasks an atomic_t

The nr_deadline_tasks variable in the cpuset structure was introduced by commit 6c24849f5515 ("sched/cpuset: Keep track of SCHED_DEADLINE task in cpusets"). It is reported by sashiko [1] that nr_deadline_tasks can currently be modified by inc_dl_tasks_cs() under rq->lock and by cpuset_attach() under cpuset_mutex. So if both updates happen simultaneously, the nr_deadline_tasks variable can be corrupted leading to incorrect operations down the road.

Fix that by changing its type to atomic_t so that nr_deadline_tasks are always atomically updated. This fix patch is a low hanging fruit.

Leer descripción completaMostrar menos

It can handle some of the races between a concurrent sched_setscheduler() and cpuset_can_attach()/cpuset_attach() calls, but not all of them like the other issue raised by sashiko [2]. This will be handled hopefully in a future follow up patch.

[1] https://sashiko.dev/#/patchset/20260626181923.133658-1-longman%40redhat.com [2] https://sashiko.dev/#/patchset/20260630033344.352702-1-longman%40redhat.com

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-93150",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6c24849f5515e4966d94fa5279bdff4acf2e9489",
              "lessThan": "e422b32e6a57269ca8164c60674a78bee85cf5fb",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6c24849f5515e4966d94fa5279bdff4acf2e9489",
              "lessThan": "e5965ae3f7c918151b87e5c925b7978afbeaf638",
              "versionType": "git"
            },
            {
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              "version": "6c24849f5515e4966d94fa5279bdff4acf2e9489",
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              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6c24849f5515e4966d94fa5279bdff4acf2e9489",
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            {
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            {
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              "version": "43d8cbfefa7c59bd3b5fe184535eca476d45304e",
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            },
            {
              "status": "affected",
              "version": "d1b4262b78cc7638642833252ae92fc586854ffb",
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            },
            {
              "status": "affected",
              "version": "74fac5bb0d375d6b8f5e7997925063c509089c9c",
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            },
            {
              "status": "affected",
              "version": "5.10.193",
              "lessThan": "5.11",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.15.129",
              "lessThan": "5.16",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.1.50",
              "lessThan": "6.2",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.4.13",
              "lessThan": "6.5",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "kernel/cgroup/cpuset-internal.h",
            "kernel/cgroup/cpuset.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.5"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.5",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "kernel/cgroup/cpuset-internal.h",
            "kernel/cgroup/cpuset.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-17T17:18:10.213",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/78d9daf5e13ad1448b7dfebac949936710ec7565",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/95220e1f18f6321008f021abc7d6f581f64bcb82",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e422b32e6a57269ca8164c60674a78bee85cf5fb",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e5965ae3f7c918151b87e5c925b7978afbeaf638",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncgroup/cpuset: Make nr_deadline_tasks an atomic_t\n\nThe nr_deadline_tasks variable in the cpuset structure was introduced by\ncommit 6c24849f5515 (\"sched/cpuset: Keep track of SCHED_DEADLINE task\nin cpusets\"). It is reported by sashiko [1] that nr_deadline_tasks\ncan currently be modified by inc_dl_tasks_cs() under rq->lock and\nby cpuset_attach() under cpuset_mutex. So if both updates happen\nsimultaneously, the nr_deadline_tasks variable can be corrupted leading\nto incorrect operations down the road.\n\nFix that by changing its type to atomic_t so that nr_deadline_tasks\nare always atomically updated. This fix patch is a low hanging fruit.\nIt can handle some of the races between a concurrent sched_setscheduler()\nand cpuset_can_attach()/cpuset_attach() calls, but not all of them like\nthe other issue raised by sashiko [2]. This will be handled hopefully\nin a future follow up patch.\n\n[1] https://sashiko.dev/#/patchset/20260626181923.133658-1-longman%40redhat.com\n[2] https://sashiko.dev/#/patchset/20260630033344.352702-1-longman%40redhat.com"
    }
  ],
  "lastModified": "2026-09-17T17:18:10.213",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}