{"id":"CVE-2025-38355","title":"drm/xe: Process deferred GGTT node removals on device unwind","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe: Process deferred GGTT node removals on device unwind\n\nWhile we are indirectly draining our dedicated workqueue ggtt->wq\nthat we use to complete asynchronous rem…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 919bb54e989c1edef87e9797be125c94c450fc65 < 1b12f8dabbb8fd7d5a2611dd7bc5982ffbc2e5df","Linux >= 919bb54e989c1edef87e9797be125c94c450fc65 < 5ab4eba9b26a93605b4f2f2b688d6ba818d7331d","Linux >= 919bb54e989c1edef87e9797be125c94c450fc65 < af2b588abe006bd55ddd358c4c3b87523349c475","Linux 6.12"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:55:18.224753Z"},"published":"2025-07-25","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:02:34.982Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38355","references":[{"url":"https://git.kernel.org/stable/c/1b12f8dabbb8fd7d5a2611dd7bc5982ffbc2e5df"},{"url":"https://git.kernel.org/stable/c/5ab4eba9b26a93605b4f2f2b688d6ba818d7331d"},{"url":"https://git.kernel.org/stable/c/af2b588abe006bd55ddd358c4c3b87523349c475"}],"tags":["cve.org"],"epss":0.00187,"epssPercentile":0.08304,"ingestedAt":"2026-11-05T22:38:31.960Z","slug":"CVE-2025-38355","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe: Process deferred GGTT node removals on device unwind\n\nWhile we are indirectly draining our dedicated workqueue ggtt->wq\nthat we use to complete asynchronous removal of some GGTT nodes,\nthis happends as part of the managed-drm unwinding (ggtt_fini_early),\nwhich could be later then manage-device unwinding, where we could\nalready unmap our MMIO/GMS mapping (mmio_fini).\n\nThis was recently observed during unsuccessful VF initialization:\n\n [ ] xe 0000:00:02.1: probe with driver xe failed with error -62\n [ ] xe 0000:00:02.1: DEVRES REL ffff88811e747340 __xe_bo_unpin_map_no_vm (16 bytes)\n [ ] xe 0000:00:02.1: DEVRES REL ffff88811e747540 __xe_bo_unpin_map_no_vm (16 bytes)\n [ ] xe 0000:00:02.1: DEVRES REL ffff88811e747240 __xe_bo_unpin_map_no_vm (16 bytes)\n [ ] xe 0000:00:02.1: DEVRES REL ffff88811e747040 tiles_fini (16 bytes)\n [ ] xe 0000:00:02.1: DEVRES REL ffff88811e746840 mmio_fini (16 bytes)\n [ ] xe 0000:00:02.1: DEVRES REL ffff88811e747f40 xe_bo_pinned_fini (16 bytes)\n [ ] xe 0000:00:02.1: DEVRES REL ffff88811e746b40 devm_drm_dev_init_release (16 bytes)\n [ ] xe 0000:00:02.1: [drm:drm_managed_release] drmres release begin\n [ ] xe 0000:00:02.1: [drm:drm_managed_release] REL ffff88810ef81640 __fini_relay (8 bytes)\n [ ] xe 0000:00:02.1: [drm:drm_managed_release] REL ffff88810ef80d40 guc_ct_fini (8 bytes)\n [ ] xe 0000:00:02.1: [drm:drm_managed_release] REL ffff88810ef80040 __drmm_mutex_release (8 bytes)\n [ ] xe 0000:00:02.1: [drm:drm_managed_release] REL ffff88810ef80140 ggtt_fini_early (8 bytes)\n\nand this was leading to:\n\n [ ] BUG: unable to handle page fault for address: ffffc900058162a0\n [ ] #PF: supervisor write access in kernel mode\n [ ] #PF: error_code(0x0002) - not-present page\n [ ] Oops: Oops: 0002 [#1] SMP NOPTI\n [ ] Tainted: [W]=WARN\n [ ] Workqueue: xe-ggtt-wq ggtt_node_remove_work_func [xe]\n [ ] RIP: 0010:xe_ggtt_set_pte+0x6d/0x350 [xe]\n [ ] Call Trace:\n [ ]  <TASK>\n [ ]  xe_ggtt_clear+0xb0/0x270 [xe]\n [ ]  ggtt_node_remove+0xbb/0x120 [xe]\n [ ]  ggtt_node_remove_work_func+0x30/0x50 [xe]\n [ ]  process_one_work+0x22b/0x6f0\n [ ]  worker_thread+0x1e8/0x3d\n\nAdd managed-device action that will explicitly drain the workqueue\nwith all pending node removals prior to releasing MMIO/GSM mapping.\n\n(cherry picked from commit 89d2835c3680ab1938e22ad81b1c9f8c686bd391)\n\n## Affected\n\n- `Linux >= 919bb54e989c1edef87e9797be125c94c450fc65 < 1b12f8dabbb8fd7d5a2611dd7bc5982ffbc2e5df`\n- `Linux >= 919bb54e989c1edef87e9797be125c94c450fc65 < 5ab4eba9b26a93605b4f2f2b688d6ba818d7331d`\n- `Linux >= 919bb54e989c1edef87e9797be125c94c450fc65 < af2b588abe006bd55ddd358c4c3b87523349c475`\n- `Linux 6.12`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}