{
  "cveId": "CVE-2026-68263",
  "url": "https://patchblox.com/security/cve/CVE-2026-68263",
  "summary": "CVE-2026-68263 is fixed in 17 products on 1 platform, first by DEBIAN-CVE-2026-68263, released August 11, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  drm/imagination: Fix double call to drm_sched_en...",
  "description": "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 \u2003\u2003pvr_context_kill_queues \u2003\u2003\u2003\u2003pvr_queue_kill \u2003\u2003\u2003\u2003\u2003\u2003drm_sched_entity_destroy \u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003drm_sched_entity_fini // here \u2003\u2003pvr_context_put \u2003\u2003\u2003\u2003kref_put(..., pvr_context_release) \u2003\u2003\u2003\u2003\u2003\u2003pvr_context_destroy_queues \u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003pvr_queue_destroy \u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003drm_sched_entity_fini // here  Call to drm_sched_entity_destroy() from pvr_context_kill_queues() calls drm_sched_entity_flush() \u002B 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 (\u0022drm/sched: Account entity GPU time\u0022):  [  789.490527] ------------[ cut here ]------------ [  789.490559] refcount_t: underflow; use-after-free. [  789.490657] WARNING: lib/refcount.c:28 at refcount_warn_saturate\u002B0xf4/0x144, 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 Not tainted 7.0.0-rc7-02049-g5e2c0700091b #22 PREEMPT [  789.490809] Hardware name: Texas Instruments AM625 SK (DT) [  789.490815] Workqueue: powervr-sched pvr_queue_fence_release_work [powervr] [  789.490868] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [  789.490876] pc : refcount_warn_saturate\u002B0xf4/0x144 [  789.490884] lr : refcount_warn_saturate\u002B0xf4/0x144 [  789.490892] sp : ffff8000822cbcc0 [  789.490895] x29: ffff8000822cbcc0 x28: 0000000000000000 x27: 0000000000000000 [  789.490909] x26: 0000000000000000 x25: ffff800081b1e338 x24: ffff000004541405 [  789.490922] x23: ffff000004bea950 x22: ffff00000042e400 x21: ffff000007123e30 [  789.490935] x20: ffff000007123000 x19: ffff000007a80d50 x18: fffffffffffe7768 [  789.490948] x17: 74736574202c6e6f x16: 697461746e656d65 x15: ffff800081b269f0 [  789.490962] x14: 0000000000000030 x13: ffff800081b26a70 x12: 0000000000000211 [  789.490975] x11: 00000000000000c0 x10: 0000000000000b50 x9 : ffff8000822cbb30 [  789.490988] x8 : ffff0000014e7bb0 x7 : ffff00007725e780 x6 : 0000000372a05f49 [  789.491001] x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000010 [  789.491013] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0000014e7000 [  789.491027] Call trace: [  789.491032]  refcount_warn_saturate\u002B0xf4/0x144 (P) [  789.491043]  drm_sched_entity_fini\u002B0x164/0x18c [gpu_sched] [  789.491081]  pvr_queue_destroy\u002B0x64/0x134 [powervr] [  789.491110]  pvr_context_destroy_queues\u002B0x34/0x64 [powervr] [  789.491138]  pvr_context_release\u002B0x70/0xac [powervr] [  789.491166]  pvr_context_put.part.0\u002B0x5c/0x7c [powervr] [  789.491193]  pvr_context_put\u002B0x14/0x24 [powervr] [  789.491221]  pvr_queue_fence_release_work\u002B0x20/0x38 [powervr] [  789.491249]  process_one_work\u002B0x160/0x4c4 [  789.491264]  worker_thread\u002B0x188/0x310 [  789.491276]  kthread\u002B0x130/0x13c [  789.491287]  ret_from_fork\u002B0x10/0x20 [  789.491300] ---[ end trace 0000000000000000 ]---",
  "published": "2026-08-10T13:20:15Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00125,
  "epssPercentile": 0.02217,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
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  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
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}