drm/imagination: Fix double call to drm_sched_entity_fini()

{
  "id": "ee50426822c032d1cc83dee3772424890a8c10ac052106f779066d45de997df5",
  "url": "https://osv.dev/vulnerability/CVE-2026-68263",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "drm/imagination: Fix double call to drm_sched_entity_fini()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: drm/imagination: Fix double call to drm_sched_entity_fini() Call sequence of double call: pvr_context_destroy pvr_context_kill_queues pvr_queue_kill drm_sched_entity_destroy drm_sched_entity_fini // here pvr_context_put kref_put(..., pvr_context_release) pvr_context_destroy_queues pvr_queue_destroy drm_sched_entity_fini // here Call to drm_sched_entity_destroy() from pvr_context_kill_queues() calls drm_sched_entity_flush() + drm_sched_entity_fini(). drm_sched_entity_flush() ensures all pending jobs are completed and drm_sched_entity_fini() ensures no further submission is allowed as per expectation from pvr_context_kill_queues(). Double call to drm_sched_entity_fini() is misuse of the API so keep call only in pvr_context_create() failure path. Stack trace for issue with addition of refcounting for DRM entity stats in commit fd177135f0e6 (\"drm/sched: Account entity GPU time\"): [ 789.490527] ------------[ cut here ]------------ [ 789.490559] refcount_t: underflow; use-after-free. [ 789.490657] WARNING: lib/refcount.c:28 at refcount_warn_saturate+0xf4/0x144, CPU#0: kworker/u16:1/440 [ 789.490695] Modules linked in: powervr drm_gpuvm drm_exec gpu_sched drm_shmem_helper xhci_plat_hcd xhci_hcd dwc3 usbcore usb_common snd_soc_simple_card snd_soc_simple_card_utils sa2ul sha512 sha256 dwc3_am62 sha1 authenc rti_wdt libsha512 at24 sch_fq_codel fuse dm_mod ipv6 [ 789.490798] CPU: 0 UID: 0 PID: 440 Comm: kworker/u16:1 No",
    "evidence": "osv:CVE-2026-68263",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.101",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.42",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-68263",
      "aliases": [
        "CVE-2026-68263"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                {
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                {
                  "fixed": "4af24c27a39ba147a613a09e10b9e0f7294524c0"
                }
              ]
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68263.json"
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        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.8.0"
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                {
                  "fixed": "6.18.42"
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            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
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                {
                  "fixed": "7.1.6"
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              ]
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68263.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.065629665Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/4af24c27a39ba147a613a09e10b9e0f7294524c0",
        "https://git.kernel.org/stable/c/9be3f4bd6f514f69c51a8c77ea64fce2729dc7f4",
        "https://git.kernel.org/stable/c/c1136d907fd04ca5c62ba11c1159b5fe65a1760c",
        "https://git.kernel.org/stable/c/c88fdbf3da26e0179629530cae7768cd3d4ead85",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68263.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-68263",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68263.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-68263",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490306,
  "published_at": "2026-08-10T12:01:37.571+00:00"
}