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
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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{
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          "programFiles": [
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              "versionType": "semver"
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              "versionType": "semver"
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              "versionType": "semver"
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              "version": "6.18.2",
              "versionType": "semver"
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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/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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      "product_status:fixed": "1",
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      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "gpu: host1x: Fix race in syncpt alloc/free",
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      "version": "5"
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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."
          }
        ],
        "id": "CVE-2025-68732",
        "lastModified": "2026-06-17T09:59:29.757",
        "metrics": {},
        "published": "2025-12-24T11:16:02.497",
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        "vulnStatus": "Deferred"
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      "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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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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