{"id":"CVE-2026-68382","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/guc: Hold device ref until queue teardown completes\n\nGuC exec queue destruction can run asynchronously","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/guc: Hold device ref until queue teardown completes\n\nGuC exec queue destruction can run asynchronously. If the final device\nput happens from a destroy worker, dr…","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","vendor":"Linux","product":"Linux","affected":["Linux >= 2d2be279f1ca9e7288282d4214f16eea8a727cdb < 81f70f130eff985fb678d8b891c960381bc7e900","Linux >= 2d2be279f1ca9e7288282d4214f16eea8a727cdb < 03d6f83979b0d75a0b0893dfe1735ec93facf515","Linux >= 2d2be279f1ca9e7288282d4214f16eea8a727cdb < 9b7e60184f4b22e893d4ae95234d5f26261a430c","Linux 272b0e78874586d6ccae04079d75b27b47705544","Linux 421c74670b0f9d5c007f1276d3647aa58f407fde","Linux >= 6.10.14 < 6.11","Linux >= 6.11.3 < 6.12","Linux 6.12"],"published":"2026-08-10","updated":"2026-10-15","sourceUpdated":"2026-10-15T11:17:41.347","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-68382","references":[{"url":"https://git.kernel.org/stable/c/03d6f83979b0d75a0b0893dfe1735ec93facf515","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/81f70f130eff985fb678d8b891c960381bc7e900","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9b7e60184f4b22e893d4ae95234d5f26261a430c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00129,"epssPercentile":0.0225,"ingestedAt":"2026-10-15T11:00:41.690Z","slug":"CVE-2026-68382","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/guc: Hold device ref until queue teardown completes\n\nGuC exec queue destruction can run asynchronously. If the final device\nput happens from a destroy worker, drmm cleanup can end up draining\nthe same workqueue and deadlock.\n\nHold a drm_device reference for the queue lifetime and drop it after\nqueue teardown completes. This keeps drmm cleanup from running while\nasync destroy work is still pending.\n\nMove GuC destroy work to a module-lifetime Xe workqueue and flush it\non PCI remove so hot-unbind/rebind still waits for pending destroy work.\n\nWith queue-held device refs, guc_submit_sw_fini() cannot run with live\nGuC IDs. Replace the fini wait with an assertion and remove the unused\nfini_wq.\n\nv2:\n  - Rebase\n\nv3:\n  - Switch to queue-lifetime drm_dev_get()/drm_dev_put() model. (Matt)\n  - Queue async teardown on system_dfl_wq instead of xe->destroy_wq. (Matt)\n  - Drop separate deferred drm_dev_put worker.\n  - Remove stale drain_workqueue(xe->destroy_wq) from guc_submit_sw_fini().\n\nv4:\n  - Replace the guc_submit_sw_fini() wait with an assertion and remove\n    the now-unused fini_wq. (sashiko)\n\nv5:\n  - Move destroy work to a module-lifetime Xe workqueue instead of\n    system_dfl_wq. (Matt)\n  - Flush the module-lifetime destroy workqueue during PCI remove to\n    preserve the old device-remove wait semantics.\n\nv6:\n  - Keep SVM pagemap destroy work on the per-device destroy_wq to avoid\n    letting it outlive the xe_device/drm_device. (Sashiko)\n  - Use WQ_MEM_RECLAIM for xe->destroy_wq because SVM pagemap destroy work\n    can be queued from the reclaim path.\n\nv7:\n  - Drop the per-device xe->destroy_wq and use the module-level destroy WQ\n    for SVM pagemap destroy as well. (Matt)\n  - Rename xe_exec_queue_destroy_wq_*() helpers to xe_destroy_wq_*()\n    helpers because the WQ is no longer exec-queue specific. (Matt)\n\nv8:\n  - Rebase.\n\nv9:\n  - Keep SVM pagemap destroy work on the per-device WQ_MEM_RECLAIM\n    destroy_wq because it can be queued from reclaim and embeds\n    the dev_pagemap used by devres teardown. (Sashiko)\n  - Keep the module-level destroy WQ GuC-only and drop WQ_MEM_RECLAIM\n    from it.\n  - Update the module-WQ kdoc to document the GuC/SVM split.\n\nv10:\n  - Keep xe->destroy_wq per-cpu while adding WQ_MEM_RECLAIM to fix the\n    workqueue allocation warning.\n\nv11:\n  - Drop the SVM pagemap destroy comment as it was revision-specific.\n    (Thomas)\n\nv12:\n  - Rebase.\n\n(cherry picked from commit da1124abac689cc2b1d8995e5f0a816f8a122edb)\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}