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

Vulnerability from cvelistv5 – Published: 2025-12-24 10:33 – Updated: 2025-12-24 10:33
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
Linux Linux Affected: f5ba33fb9690566c382624637125827b5512e766 , < 4e6e07ce0197aecfb6c4a62862acc93b3efedeb7 (git)
Affected: f5ba33fb9690566c382624637125827b5512e766 , < d138f73ffb0c57ded473c577719e6e551b7b1f27 (git)
Affected: f5ba33fb9690566c382624637125827b5512e766 , < 79197c6007f2afbfd7bcf5b9b80ccabf8483d774 (git)
Affected: f5ba33fb9690566c382624637125827b5512e766 , < c7d393267c497502fa737607f435f05dfe6e3d9b (git)
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    Linux Linux Affected: 5.13
Unaffected: 0 , < 5.13 (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-rc1 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "drivers/gpu/host1x/syncpt.c"
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      "descriptions": [
        {
          "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."
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        "dateUpdated": "2025-12-24T10:33:14.664Z",
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    "datePublished": "2025-12-24T10:33:14.664Z",
    "dateReserved": "2025-12-24T10:30:51.028Z",
    "dateUpdated": "2025-12-24T10:33:14.664Z",
    "state": "PUBLISHED"
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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