CVE-2025-68748 (GCVE-0-2025-68748)

Vulnerability from cvelistv5 – Published: 2025-12-24 12:09 – Updated: 2026-08-05 12:11
VLAI
Title
drm/panthor: Fix UAF race between device unplug and FW event processing
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/panthor: Fix UAF race between device unplug and FW event processing The function panthor_fw_unplug() will free the FW memory sections. The problem is that there could still be pending FW events which are yet not handled at this point. process_fw_events_work() can in this case try to access said freed memory. Simply call disable_work_sync() to both drain and prevent future invocation of process_fw_events_work().
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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: de85488138247d034eb3241840424a54d660926b , < 31db188355a49337e3e8ec98b99377e482eab22c (git)
Affected: de85488138247d034eb3241840424a54d660926b , < 5e3ff56d4cb591daea70786d07dc21d06dc34108 (git)
Affected: de85488138247d034eb3241840424a54d660926b , < 6c1da9ae2c123a9ffda5375e64cc81f9ed3cc04a (git)
Affected: de85488138247d034eb3241840424a54d660926b , < 7051f6ba968fa69918d72cc26de4d6cf7ea05b90 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.10
Unaffected: 0 , < 6.10 (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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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/panthor/panthor_sched.c"
          ],
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          "vendor": "Linux",
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          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "6.10"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
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          "nodes": [
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                  "versionStartIncluding": "6.10",
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/panthor: Fix UAF race between device unplug and FW event processing\n\nThe function panthor_fw_unplug() will free the FW memory sections.\nThe problem is that there could still be pending FW events which are yet\nnot handled at this point. process_fw_events_work() can in this case try\nto access said freed memory.\n\nSimply call disable_work_sync() to both drain and prevent future\ninvocation of process_fw_events_work()."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - Exploitation requires local access to the Panthor DRM render device and cannot be initiated through a network protocol or adjacent interface.\nAC:L - A render-node client can use concurrent submissions to keep firmware events pending while driving fault, hang, reset, and eventual unplug processing. The attacker can repeatedly generate events and influence both sides of the workqueue race.\nPR:L - Panthor exposes GROUP_CREATE and GROUP_SUBMIT through DRM_RENDER_ALLOW without capability checks for ordinary priorities, so an unprivileged user granted normal render-node access can reach the relevant paths.\nUI:N - Concurrent GPU submissions and reset-triggering workloads require no action by another user.\nS:U - The UAF corrupts host-kernel memory but does not inherently cross a separate virtualization, IOMMU, or other security authority.\nC:H - The worker reads through stale firmware-interface pointers after their shared BO and kernel mapping are freed; reclaim exploitation can enable disclosure of arbitrary kernel memory.\nI:H - The stale worker writes request, acknowledgement, and doorbell fields into freed or reallocated memory, permitting kernel-memory corruption and potential control-flow hijacking.\nA:H - Accessing the destroyed firmware mapping can cause a kernel page fault, oops, or panic, and successful corruption can render the entire system unavailable."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:11:17.874Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/31db188355a49337e3e8ec98b99377e482eab22c"
        },
        {
          "url": "https://git.kernel.org/stable/c/5e3ff56d4cb591daea70786d07dc21d06dc34108"
        },
        {
          "url": "https://git.kernel.org/stable/c/6c1da9ae2c123a9ffda5375e64cc81f9ed3cc04a"
        },
        {
          "url": "https://git.kernel.org/stable/c/7051f6ba968fa69918d72cc26de4d6cf7ea05b90"
        }
      ],
      "title": "drm/panthor: Fix UAF race between device unplug and FW event processing",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68748",
    "datePublished": "2025-12-24T12:09:43.620Z",
    "dateReserved": "2025-12-24T10:30:51.032Z",
    "dateUpdated": "2026-08-05T12:11:17.874Z",
    "state": "PUBLISHED"
  },
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      "date": "2026-10-31",
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            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/panthor: Fix UAF race between device unplug and FW event processing\n\nThe function panthor_fw_unplug() will free the FW memory sections.\nThe problem is that there could still be pending FW events which are yet\nnot handled at this point. process_fw_events_work() can in this case try\nto access said freed memory.\n\nSimply call disable_work_sync() to both drain and prevent future\ninvocation of process_fw_events_work()."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrm/panthor: Correcci\u00f3n de la condici\u00f3n de carrera UAF entre la desconexi\u00f3n del dispositivo y el procesamiento de eventos de FW\n\nLa funci\u00f3n panthor_fw_unplug() liberar\u00e1 las secciones de memoria de FW.\nEl problema es que a\u00fan podr\u00eda haber eventos de FW pendientes que a\u00fan no se han manejado en este punto. process_fw_events_work() puede en este caso intentar acceder a dicha memoria liberada.\n\nSimplemente se llama a disable_work_sync() para tanto vaciar como prevenir futuras invocaciones de process_fw_events_work()."
          }
        ],
        "id": "CVE-2025-68748",
        "lastModified": "2026-10-13T10:10:00.193",
        "metrics": {
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                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
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    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-08-20T12:43:53+00:00",
      "cve": "CVE-2025-68748",
      "id": "CVE-2025-68748",
      "initial_release_date": "2025-12-24T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Kernel: Privilege escalation via use-after-free in drm/panthor",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68748.json",
      "version": "3"
    }
  }
}



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