{"cve":"CVE-2026-80606","nvd":{"published":"2026-08-28T08:16:44.573","modified":"2026-10-16T20:18:03.627","status":"Received","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)","cvss_v4":null,"cvss_v3":{"version":"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},"cwes":[],"references":["https://git.kernel.org/stable/c/ab9ea5c943c7e780124e75b7ffad9f1c752b2579","https://git.kernel.org/stable/c/dca6e08c923a44d2d66b955e03dd57a3a38c2b94","https://git.kernel.org/stable/c/f9a9abd7bbdab3dfe1b1155e1457dc02b5e14ea5"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:50.842544443+00:00"},"epss":{"cve":"CVE-2026-80606","score":0.00173,"percentile":0.06689,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}