{"api_version":"1","generated_at":"2026-08-28T17:26:50+00:00","cve":"CVE-2026-80606","urls":{"html":"https://cve.report/CVE-2026-80606","api":"https://cve.report/api/cve/CVE-2026-80606.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80606","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80606"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-08-28 08:16:44","updated_at":"2026-08-28 08:16:44"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/dca6e08c923a44d2d66b955e03dd57a3a38c2b94","name":"https://git.kernel.org/stable/c/dca6e08c923a44d2d66b955e03dd57a3a38c2b94","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ab9ea5c943c7e780124e75b7ffad9f1c752b2579","name":"https://git.kernel.org/stable/c/ab9ea5c943c7e780124e75b7ffad9f1c752b2579","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f9a9abd7bbdab3dfe1b1155e1457dc02b5e14ea5","name":"https://git.kernel.org/stable/c/f9a9abd7bbdab3dfe1b1155e1457dc02b5e14ea5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80606","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80606","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9e978741488261e117bb50e5dfcf8e4080990958 f9a9abd7bbdab3dfe1b1155e1457dc02b5e14ea5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9e978741488261e117bb50e5dfcf8e4080990958 ab9ea5c943c7e780124e75b7ffad9f1c752b2579 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9e978741488261e117bb50e5dfcf8e4080990958 dca6e08c923a44d2d66b955e03dd57a3a38c2b94 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/gpu/drm/xe/xe_pt.c","drivers/gpu/drm/xe/xe_svm.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"f9a9abd7bbdab3dfe1b1155e1457dc02b5e14ea5","status":"affected","version":"9e978741488261e117bb50e5dfcf8e4080990958","versionType":"git"},{"lessThan":"ab9ea5c943c7e780124e75b7ffad9f1c752b2579","status":"affected","version":"9e978741488261e117bb50e5dfcf8e4080990958","versionType":"git"},{"lessThan":"dca6e08c923a44d2d66b955e03dd57a3a38c2b94","status":"affected","version":"9e978741488261e117bb50e5dfcf8e4080990958","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/gpu/drm/xe/xe_pt.c","drivers/gpu/drm/xe/xe_svm.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.18"},{"lessThan":"6.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"6.18","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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)"}],"providerMetadata":{"dateUpdated":"2026-08-28T06:48:30.960Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/f9a9abd7bbdab3dfe1b1155e1457dc02b5e14ea5"},{"url":"https://git.kernel.org/stable/c/ab9ea5c943c7e780124e75b7ffad9f1c752b2579"},{"url":"https://git.kernel.org/stable/c/dca6e08c923a44d2d66b955e03dd57a3a38c2b94"}],"title":"drm/xe/userptr: Hold notifier_lock for write on inject test path","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80606","datePublished":"2026-08-28T06:48:30.960Z","dateReserved":"2026-08-26T14:34:25.772Z","dateUpdated":"2026-08-28T06:48:30.960Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-28 08:16:44","lastModifiedDate":"2026-08-28 08:16:44","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80606","Ordinal":"1","Title":"drm/xe/userptr: Hold notifier_lock for write on inject test path","CVE":"CVE-2026-80606","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80606","Ordinal":"1","NoteData":"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)","Type":"Description","Title":"drm/xe/userptr: Hold notifier_lock for write on inject test path"}]}}}