{"id":"CVE-2026-68298","title":"drm/xe/vm: Fix SVM leak on resv obj alloc failure in xe_vm_create()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/vm: Fix SVM leak on resv obj alloc failure in xe_vm_create()\n\nCommit 9e9787414882 (\"drm/xe/userptr: replace xe_hmm with gpusvm\") made\nxe_svm_init() unconditional…","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","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 9e978741488261e117bb50e5dfcf8e4080990958 < 279339aa8bdcf9db40094cf2bcbd495c53dbe817","Linux >= 9e978741488261e117bb50e5dfcf8e4080990958 < 9ac92736030f3395d970c300eaeb59ac258a0c3e","Linux >= 9e978741488261e117bb50e5dfcf8e4080990958 < d2c6800ad1802bed72a6de1416536737f114f1d6","Linux 6.18"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T15:46:49.865015Z"},"published":"2026-08-10","updated":"2026-10-16","sourceUpdated":"2026-10-16T15:53:07.080Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68298","references":[{"url":"https://git.kernel.org/stable/c/279339aa8bdcf9db40094cf2bcbd495c53dbe817"},{"url":"https://git.kernel.org/stable/c/9ac92736030f3395d970c300eaeb59ac258a0c3e"},{"url":"https://git.kernel.org/stable/c/d2c6800ad1802bed72a6de1416536737f114f1d6"}],"tags":["cve.org"],"epss":0.00127,"epssPercentile":0.0213,"ingestedAt":"2026-10-16T17:24:46.860Z","slug":"CVE-2026-68298","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/vm: Fix SVM leak on resv obj alloc failure in xe_vm_create()\n\nCommit 9e9787414882 (\"drm/xe/userptr: replace xe_hmm with gpusvm\") made\nxe_svm_init() unconditional in xe_vm_create() and extended it to also\ninitialize a \"simple\" gpusvm state for non-fault-mode VMs. The matching\nxe_svm_fini() call in xe_vm_close_and_put() was updated to run\nunconditionally, but the error unwind path in xe_vm_create() was not.\n\nOn the drm_gpuvm_resv_object_alloc() failure path, xe_svm_init() has\nalready succeeded but xe_svm_fini() is only called when\nXE_VM_FLAG_FAULT_MODE is set. For non-fault-mode VMs this leaves\nvm->svm.gpusvm partially initialized and leaks the resources allocated\nby drm_gpusvm_init().\n\nFor fault-mode VMs, xe_svm_init() additionally acquires the pagemap\nowner via drm_pagemap_acquire_owner() and the pagemaps via\nxe_svm_get_pagemaps(). Those resources are released by xe_svm_close(),\nnot xe_svm_fini(). On the same error path, xe_svm_close() is not\ncalled either, so fault-mode VMs leak the pagemap owner and pagemaps.\n\nFix both leaks:\n\n- Call xe_svm_fini() unconditionally on the err_svm_fini path, matching\n  the unconditional xe_svm_init() call. Move the vm->size = 0\n  assignment out of the conditional so the xe_vm_is_closed() assert in\n  xe_svm_fini() (and xe_svm_close()) holds for both modes.\n\n- Call xe_svm_close() for fault-mode VMs before xe_svm_fini(), matching\n  the ordering used in xe_vm_close_and_put().\n\n(cherry picked from commit ca2a3587d577ba764e0fe628fb676244fc33ddd4)\n\n## Affected\n\n- `Linux >= 9e978741488261e117bb50e5dfcf8e4080990958 < 279339aa8bdcf9db40094cf2bcbd495c53dbe817`\n- `Linux >= 9e978741488261e117bb50e5dfcf8e4080990958 < 9ac92736030f3395d970c300eaeb59ac258a0c3e`\n- `Linux >= 9e978741488261e117bb50e5dfcf8e4080990958 < d2c6800ad1802bed72a6de1416536737f114f1d6`\n- `Linux 6.18`\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":[]}