CVE-2025-68732 (GCVE-0-2025-68732)

Vulnerability from cvelistv5 – Published: 2025-12-24 10:33 – Updated: 2026-05-11 21:52
VLAI
Title
gpu: host1x: Fix race in syncpt alloc/free
Summary
In the Linux kernel, the following vulnerability has been resolved: gpu: host1x: Fix race in syncpt alloc/free Fix race condition between host1x_syncpt_alloc() and host1x_syncpt_put() by using kref_put_mutex() instead of kref_put() + manual mutex locking. This ensures no thread can acquire the syncpt_mutex after the refcount drops to zero but before syncpt_release acquires it. This prevents races where syncpoints could be allocated while still being cleaned up from a previous release. Remove explicit mutex locking in syncpt_release as kref_put_mutex() handles this atomically.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f5ba33fb9690566c382624637125827b5512e766 , < ca9388fba50dac2eb71c13702b7022a801bef90e (git)
Affected: f5ba33fb9690566c382624637125827b5512e766 , < 4aeaece518fa4436af93d1d8b786200d9656ff4b (git)
Affected: f5ba33fb9690566c382624637125827b5512e766 , < 6245cce711e2cdb2cc75c0bb8632952e36f8c972 (git)
Affected: f5ba33fb9690566c382624637125827b5512e766 , < 4e6e07ce0197aecfb6c4a62862acc93b3efedeb7 (git)
Affected: f5ba33fb9690566c382624637125827b5512e766 , < d138f73ffb0c57ded473c577719e6e551b7b1f27 (git)
Affected: f5ba33fb9690566c382624637125827b5512e766 , < 79197c6007f2afbfd7bcf5b9b80ccabf8483d774 (git)
Affected: f5ba33fb9690566c382624637125827b5512e766 , < c7d393267c497502fa737607f435f05dfe6e3d9b (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.13
Unaffected: 0 , < 5.13 (semver)
Unaffected: 5.15.198 , ≤ 5.15.* (semver)
Unaffected: 6.1.160 , ≤ 6.1.* (semver)
Unaffected: 6.6.120 , ≤ 6.6.* (semver)
Unaffected: 6.12.63 , ≤ 6.12.* (semver)
Unaffected: 6.17.13 , ≤ 6.17.* (semver)
Unaffected: 6.18.2 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpu: host1x: Fix race in syncpt alloc/free\n\nFix race condition between host1x_syncpt_alloc()\nand host1x_syncpt_put() by using kref_put_mutex()\ninstead of kref_put() + manual mutex locking.\n\nThis ensures no thread can acquire the\nsyncpt_mutex after the refcount drops to zero\nbut before syncpt_release acquires it.\nThis prevents races where syncpoints could\nbe allocated while still being cleaned up\nfrom a previous release.\n\nRemove explicit mutex locking in syncpt_release\nas kref_put_mutex() handles this atomically."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:52:16.287Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/ca9388fba50dac2eb71c13702b7022a801bef90e"
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        {
          "url": "https://git.kernel.org/stable/c/4aeaece518fa4436af93d1d8b786200d9656ff4b"
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          "url": "https://git.kernel.org/stable/c/6245cce711e2cdb2cc75c0bb8632952e36f8c972"
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        {
          "url": "https://git.kernel.org/stable/c/c7d393267c497502fa737607f435f05dfe6e3d9b"
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    "cveId": "CVE-2025-68732",
    "datePublished": "2025-12-24T10:33:14.664Z",
    "dateReserved": "2025-12-24T10:30:51.028Z",
    "dateUpdated": "2026-05-11T21:52:16.287Z",
    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
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      "id": "msrc_CVE-2025-68732",
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      "product_status:fixed": "1",
      "product_status:known_affected": "3",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "gpu: host1x: Fix race in syncpt alloc/free",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-68732.json",
      "version": "5"
    },
    "nvd": {
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                "programFiles": [
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpu: host1x: Fix race in syncpt alloc/free\n\nFix race condition between host1x_syncpt_alloc()\nand host1x_syncpt_put() by using kref_put_mutex()\ninstead of kref_put() + manual mutex locking.\n\nThis ensures no thread can acquire the\nsyncpt_mutex after the refcount drops to zero\nbut before syncpt_release acquires it.\nThis prevents races where syncpoints could\nbe allocated while still being cleaned up\nfrom a previous release.\n\nRemove explicit mutex locking in syncpt_release\nas kref_put_mutex() handles this atomically."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ngpu: host1x: Corrige condici\u00f3n de carrera en la asignaci\u00f3n/liberaci\u00f3n de syncpt\n\nCorrige la condici\u00f3n de carrera entre host1x_syncpt_alloc() y host1x_syncpt_put() mediante el uso de kref_put_mutex() en lugar de kref_put() + bloqueo manual de mutex.\n\nEsto asegura que ning\u00fan hilo pueda adquirir el syncpt_mutex despu\u00e9s de que el contador de referencias (refcount) caiga a cero, pero antes de que syncpt_release lo adquiera. Esto previene condiciones de carrera donde los syncpoints podr\u00edan ser asignados mientras a\u00fan se est\u00e1n limpiando de una liberaci\u00f3n anterior.\n\nElimina el bloqueo expl\u00edcito de mutex en syncpt_release ya que kref_put_mutex() maneja esto de forma at\u00f3mica."
          }
        ],
        "id": "CVE-2025-68732",
        "lastModified": "2026-10-13T11:10:00.203",
        "metrics": {},
        "published": "2025-12-24T11:16:02.497",
        "references": [
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-30T10:23:04+00:00",
      "cve": "CVE-2025-68732",
      "id": "CVE-2025-68732",
      "initial_release_date": "2025-12-24T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Denial of Service in GPU host1x due to race condition",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68732.json",
      "version": "3"
    }
  }
}



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