CVE-2026-93150 (GCVE-0-2026-93150)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:11 – Updated: 2026-10-30 12:36
VLAI
Title
cgroup/cpuset: Make nr_deadline_tasks an atomic_t
Summary
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. 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
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d1b4262b78cc7638642833252ae92fc586854ffb , < 4987d336abf3fa575a2d953f69e11154ac9802c3 (git)
Affected: 6c24849f5515e4966d94fa5279bdff4acf2e9489 , < 642648fa7595241e4d491add5007bc33f11defb5 (git)
Affected: 6c24849f5515e4966d94fa5279bdff4acf2e9489 , < e422b32e6a57269ca8164c60674a78bee85cf5fb (git)
Affected: 6c24849f5515e4966d94fa5279bdff4acf2e9489 , < e5965ae3f7c918151b87e5c925b7978afbeaf638 (git)
Affected: 6c24849f5515e4966d94fa5279bdff4acf2e9489 , < 78d9daf5e13ad1448b7dfebac949936710ec7565 (git)
Affected: 6c24849f5515e4966d94fa5279bdff4acf2e9489 , < 95220e1f18f6321008f021abc7d6f581f64bcb82 (git)
Affected: 5ac05ce5684315d0e71194a63febaf33921c3268 (git)
Affected: 43d8cbfefa7c59bd3b5fe184535eca476d45304e (git)
Affected: 74fac5bb0d375d6b8f5e7997925063c509089c9c (git)
Affected: 6.1.50 , < 6.1.191 (semver)
Affected: 5.10.193 , < 5.11 (semver)
Affected: 5.15.129 , < 5.16 (semver)
Affected: 6.4.13 , < 6.5 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.5
Unaffected: 0 , < 6.5 (semver)
Unaffected: 6.1.191 , ≤ 6.1.* (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
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          "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-\u003elock 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"
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    "dateReserved": "2026-09-17T16:02:15.089Z",
    "dateUpdated": "2026-10-30T12:36:08.842Z",
    "state": "PUBLISHED"
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          }
        ],
        "id": "CVE-2026-93150",
        "lastModified": "2026-10-30T13:20:58.420",
        "metrics": {},
        "published": "2026-09-17T17:18:10.213",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
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    },
    "redhat_vex": {
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      "current_release_date": "2026-11-06T01:59:32+00:00",
      "cve": "CVE-2026-93150",
      "id": "CVE-2026-93150",
      "initial_release_date": "2026-09-17T00:00:00+00:00",
      "product_status:known_affected": "160",
      "product_status:known_not_affected": "43",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: cgroup/cpuset: Make nr_deadline_tasks an atomic_t",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93150.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2026-10-20T00:25:27Z",
      "cve": "CVE-2026-93150",
      "id": "CVE-2026-93150",
      "initial_release_date": "2026-09-18T00:11:33Z",
      "product_status:known_affected": "109",
      "product_status:known_not_affected": "239",
      "product_status:recommended": "4",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-93150",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-93150.json",
      "version": "6"
    }
  }
}



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Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.