{"id":"CVE-2026-80606","revision":"5a7e704c80be4d3f86ed37f78bfbe04d","records":[{"revision":"5a7e704c80be4d3f86ed37f78bfbe04d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80606","aliases":[],"title":"drm/xe/userptr: Hold notifier_lock for write on inject test path","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/userptr: Hold notifier_lock for write on inject test path\n\nWhen CONFIG_DRM_XE_USERPTR_INVAL_INJECT=y, xe_pt_svm_userptr_pre_commit()\nruns vma_check_userptr() with the svm notifier_lock taken for read. The\ntest injection causes vma_check_userptr() to call\nxe_vma_userptr_force_invalidate(), which feeds into\nxe_vma_userptr_do_inval() with drm_gpusvm_ctx.in_notifier=true. That\nflag tells drm_gpusvm_unmap_pages() the caller already holds\nnotifier_lock for write and only asserts the mode. Because the caller\nactually holds it for read, the assertion fires:\n\n  WARNING: drivers/gpu/drm/drm_gpusvm.c:1669 at \\\n           drm_gpusvm_unmap_pages+0xd4/0x130 [drm_gpusvm_helper]\n  Call Trace:\n   xe_vma_userptr_do_inval+0x40d/0xfd0 [xe]\n   xe_vma_userptr_invalidate_pass1+0x3e6/0x8d0 [xe]\n   xe_vma_userptr_force_invalidate+0xde/0x290 [xe]\n   vma_check_userptr.constprop.0+0x1c6/0x220 [xe]\n   xe_pt_svm_userptr_pre_commit+0x6a3/0xc60 [xe]\n   ...\n   xe_vm_bind_ioctl+0x3a0a/0x4480 [xe]\n\nAcquire notifier_lock for write in pre-commit when the inject Kconfig\nis enabled, via new helpers xe_pt_svm_userptr_notifier_lock()/_unlock().\nRename xe_svm_assert_held_read() to\nxe_svm_assert_held_read_or_inject_write() so it asserts the correct\nmode under each build configuration. Production builds\n(CONFIG_DRM_XE_USERPTR_INVAL_INJECT=n) keep the existing read-mode\nbehavior bit-for-bit.\n\n(cherry picked from commit 80ccbd97ffee8ad2e73167d826fe7be548364365)","state":0,"publishedAt":"2026-08-28T06:48:30.96+00:00","modifiedAt":"2026-10-16T19:26:30.365+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/gpu/drm/xe/xe_pt.c\",\n                        \"drivers/gpu/drm/xe/xe_svm.h\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"9e978741488261e117bb50e5dfcf8e4080990958\",\n                            \"lessThan\": \"f9a9abd7bbdab3dfe1b1155e1457dc02b5e14ea5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9e978741488261e117bb50e5dfcf8e4080990958\",\n                            \"lessThan\": \"ab9ea5c943c7e780124e75b7ffad9f1c752b2579\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9e978741488261e117bb50e5dfcf8e4080990958\",\n                            \"lessThan\": \"dca6e08c923a44d2d66b955e03dd57a3a38c2b94\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/gpu/drm/xe/xe_pt.c\",\n                        \"drivers/gpu/drm/xe/xe_svm.h\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.18\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.18\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.40\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.5\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/f9a9abd7bbdab3dfe1b1155e1457dc02b5e14ea5","https://git.kernel.org/stable/c/ab9ea5c943c7e780124e75b7ffad9f1c752b2579","https://git.kernel.org/stable/c/dca6e08c923a44d2d66b955e03dd57a3a38c2b94"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80606","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80606","identifiers":["CVE-2026-80606"]},"retained":false,"historicalAffected":[]}],"coverage":[]}