{"id":"CVE-2026-68382","summary":"drm/xe/guc: Hold device ref until queue teardown completes","details":"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, 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-\u003edestroy_wq. (Matt)\n  - Drop separate deferred drm_dev_put worker.\n  - Remove stale drain_workqueue(xe-\u003edestroy_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-\u003edestroy_wq because SVM pagemap destroy work\n    can be queued from the reclaim path.\n\nv7:\n  - Drop the per-device xe-\u003edestroy_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-\u003edestroy_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)","modified":"2026-08-12T04:19:22.905195685Z","published":"2026-08-10T12:04:01.187Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68382.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/03d6f83979b0d75a0b0893dfe1735ec93facf515"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9b7e60184f4b22e893d4ae95234d5f26261a430c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68382.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68382"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"2d2be279f1ca9e7288282d4214f16eea8a727cdb"},{"fixed":"03d6f83979b0d75a0b0893dfe1735ec93facf515"},{"fixed":"9b7e60184f4b22e893d4ae95234d5f26261a430c"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"272b0e78874586d6ccae04079d75b27b47705544"},{"last_affected":"421c74670b0f9d5c007f1276d3647aa58f407fde"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.10.14"},{"fixed":"6.11"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.11.3"},{"fixed":"6.12"}]}],"versions":["v6.11-rc1","v6.11-rc5","v6.11.2","v6.10.13","v6.11","v6.11.1","v6.10.12","v6.10.11","v6.11-rc7","v6.10.10","v6.10-rc1","v6.11-rc6","v6.11-rc3","v6.10.9","v6.11-rc4","v6.10.8","v6.11-rc2","v6.10.7","v6.10.6","v6.10","v6.10.5","v6.10.4","v6.10.3","v6.10.2","v6.10.1","v6.10-rc6","v6.10-rc7","v6.10-rc3","v6.9-rc1","v6.10-rc5","v6.10-rc2","v6.10-rc4","v6.9","v6.9-rc6","v6.9-rc7","v6.9-rc5","v6.9-rc3","v6.9-rc2","v6.8","v6.9-rc4","v6.8-rc1","v6.7-rc1","v6.8-rc7","v6.8-rc6","v6.8-rc5","v6.8-rc4","v6.8-rc3","v6.8-rc2","v6.7","v6.7-rc3","v6.7-rc8","v6.7-rc7","v6.7-rc6","v6.7-rc2","v6.7-rc4","v6.7-rc5","v6.6","v6.6-rc1","v6.6-rc5","v6.6-rc3","v6.6-rc7","v6.6-rc6","v6.6-rc4","v6.6-rc2","v6.5","v6.5-rc1","v6.5-rc2","v6.5-rc7","v6.5-rc4","v6.5-rc3","v6.5-rc6","v6.5-rc5","v6.4","v6.4-rc7","v6.4-rc1","v6.4-rc6","v6.4-rc5","v6.4-rc3","v6.4-rc4","v6.4-rc2","v6.3","v6.3-rc1","v6.3-rc7","v6.3-rc2","v6.3-rc3","v6.3-rc5","v6.3-rc6","v6.3-rc4","v6.2-rc6","v6.2-rc1","v6.2","v6.2-rc2","v6.2-rc8","v6.2-rc5","v6.2-rc4","v6.2-rc7","v6.2-rc3","v6.1-rc1","v6.1","v6.1-rc8","v6.1-rc3","v6.1-rc6","v6.1-rc7","v6.1-rc4","v6.1-rc2","v6.1-rc5","v6.0-rc1","v6.0","v6.0-rc7","v6.0-rc3","v6.0-rc2","v6.0-rc6","v6.0-rc4","v6.0-rc5","v5.19","v5.19-rc1","v5.19-rc5","v5.19-rc8","v5.19-rc6","v5.18","v5.19-rc2","v5.19-rc7","v5.19-rc3","v5.19-rc4","v5.18-rc1","v5.18-rc7","v5.18-rc2","v5.18-rc5","v5.17","v5.18-rc4","v5.18-rc3","v5.18-rc6","v5.17-rc6","v5.17-rc4","v5.17-rc8","v5.17-rc7","v5.17-rc1","v5.17-rc3","v5.17-rc2","v5.17-rc5","v5.16","v5.16-rc1","v5.16-rc8","v5.16-rc5","v5.16-rc6","v5.16-rc7","v5.16-rc3","v5.16-rc2","v5.16-rc4","v5.15","v5.15-rc2","v5.15-rc1","v5.15-rc4","v5.15-rc7","v5.15-rc3","v5.15-rc5","v5.15-rc6","v5.14","v5.14-rc3","v5.14-rc1","v5.14-rc2","v5.14-rc7","v5.14-rc6","v5.13-rc1","v5.14-rc5","v5.14-rc4","v5.13","v5.13-rc6","v5.13-rc7","v5.13-rc3","v5.13-rc2","v5.13-rc4","v5.13-rc5","v5.12","v5.12-rc2","v5.12-rc1-dontuse","v5.12-rc1","v5.12-rc8","v5.12-rc3","v5.12-rc7","v5.12-rc5","v5.12-rc6","v5.12-rc4","v5.10","v5.11","v5.11-rc3","v5.11-rc7","v5.11-rc6","v5.11-rc5","v5.11-rc1","v5.11-rc4","v5.11-rc2","v5.10-rc1","v5.10-rc7","v5.10-rc4","v5.10-rc3","v5.10-rc6","v5.9","v5.10-rc2","v5.10-rc5","v5.9-rc1","v5.9-rc7","v5.9-rc8","v5.9-rc6","v5.9-rc4","v5.9-rc5","v5.9-rc3","v5.9-rc2","v5.8","v5.7","v5.8-rc2","v5.8-rc1","v5.8-rc7","v5.8-rc5","v5.8-rc3","v5.8-rc4","v5.8-rc6","v5.7-rc4","v5.7-rc7","v5.7-rc1","v5.7-rc3","v5.7-rc2","v5.7-rc5","v5.7-rc6","v5.6","v5.6-rc1","v5.6-rc7","v5.6-rc6","v5.6-rc3","v5.6-rc4","v5.6-rc2","v5.6-rc5","v5.5","v5.5-rc5","v5.5-rc7","v5.5-rc2","v5.5-rc1","v5.4","v5.5-rc4","v5.5-rc3","v5.5-rc6","v5.4-rc1","v5.4-rc6","v5.4-rc3","v5.4-rc4","v5.4-rc8","v5.4-rc7","v5.4-rc5","v5.3","v5.4-rc2","v5.3-rc5","v5.3-rc1","v5.3-rc2","v5.3-rc3","v5.3-rc8","v5.3-rc7","v5.3-rc4","v5.2","v5.3-rc6","v5.2-rc2","v5.2-rc7","v5.2-rc4","v5.2-rc1","v5.2-rc5","v5.2-rc6","v5.2-rc3","v5.1","v5.0-rc8","v5.1-rc7","v5.1-rc1","v5.1-rc6","v5.1-rc5","v5.0","v5.1-rc3","v5.1-rc2","v5.1-rc4","v5.0-rc1","v5.0-rc4","v5.0-rc3","v5.0-rc6","v5.0-rc7","v5.0-rc2","v5.0-rc5","v4.20-rc1","v4.19","v4.20","v4.20-rc7","v4.20-rc5","v4.20-rc6","v4.20-rc4","v4.20-rc2","v4.20-rc3","v4.19-rc2","v4.19-rc8","v4.19-rc4","v4.19-rc1","v4.19-rc7","v4.19-rc6","v4.19-rc5","v4.19-rc3","v4.18","v4.18-rc1","v4.18-rc8","v4.18-rc2","v4.18-rc5","v4.18-rc6","v4.18-rc7","v4.17","v4.18-rc3","v4.18-rc4","v4.17-rc1","v4.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