{"id":"CVE-2026-98997","title":"drm/amdgpu/userq: only accept doorbell BOs as queue doorbell","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/userq: only accept doorbell BOs as queue doorbell\n\namdgpu_userq_get_doorbell_index() pins any BO passed as doorbell_handle\ninto the doorbell domain. For a re…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 < 112dbe2b10d6d088a6c599980dd960dcbfa55ff0","Linux >= f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 < 8640b3f961d743d6dc0458c2b53a3af434690cc1","Linux >= f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 < 7f7c88dbf4d543f6703e53bdeed380e886733167","Linux 6.16"],"published":"2026-10-23","updated":"2026-10-23","sourceUpdated":"2026-10-23T12:20:16.267Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98997","references":[{"url":"https://git.kernel.org/stable/c/112dbe2b10d6d088a6c599980dd960dcbfa55ff0"},{"url":"https://git.kernel.org/stable/c/8640b3f961d743d6dc0458c2b53a3af434690cc1"},{"url":"https://git.kernel.org/stable/c/7f7c88dbf4d543f6703e53bdeed380e886733167"}],"tags":["cve.org"],"ingestedAt":"2026-10-23T13:24:55.543Z","slug":"CVE-2026-98997","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/userq: only accept doorbell BOs as queue doorbell\n\namdgpu_userq_get_doorbell_index() pins any BO passed as doorbell_handle\ninto the doorbell domain. For a regular BO, TTM moves it with\nttm_bo_move_null() and its contents are lost. Since an importer on the\nsame device gets the exporter's GEM object, a client can do this to a\nbuffer another client shared with it.\n\nReject BOs that were not created in the doorbell domain.\n\nv2: drop the error message, use a local abo variable (Christian)\n\n(cherry picked from commit f7497bbc19db4821c62b9d97b31c9086feb2d917)\n\n## Affected\n\n- `Linux >= f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 < 112dbe2b10d6d088a6c599980dd960dcbfa55ff0`\n- `Linux >= f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 < 8640b3f961d743d6dc0458c2b53a3af434690cc1`\n- `Linux >= f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 < 7f7c88dbf4d543f6703e53bdeed380e886733167`\n- `Linux 6.16`\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":[]}