{"id":"CVE-2023-52485","state":"PUBLISHED","title":"drm/amd/display: Wake DMCUB before sending a command","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Wake DMCUB before sending a command\n\n[Why]\nWe can hang in place trying to send commands when the DMCUB isn't\npowered on.\n\n[How]\nFor functions that execute within a DC context or DC lock we can\nwrap the direct calls to dm_execute_dmub_cmd/list with code that\nexits idle power optimizations and reallows once we're done with\nthe command submission on success.\n\nFor DM direct submissions the DM will need to manage the enter/exit\nsequencing manually.\n\nWe cannot invoke a DMCUB command directly within the DM execution\nhelper or we can deadlock.","publishedAt":"2024-02-29T14:57:51.179Z","updatedAt":"2026-08-15T12:23:52.004Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"65138eb72e1fc687be49932b9a45325598ffa01c","status":"affected","lessThan":"303197775a97416b62d4da69280d0c120a20e009","versionType":"git"},{"version":"65138eb72e1fc687be49932b9a45325598ffa01c","status":"affected","lessThan":"8892780834ae294bc3697c7d0e056d7743900b39","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c","drivers/gpu/drm/amd/display/dc/bios/command_table2.c","drivers/gpu/drm/amd/display/dc/clk_mgr/dcn31/dcn31_clk_mgr.c","drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c","drivers/gpu/drm/amd/display/dc/clk_mgr/dcn315/dcn315_clk_mgr.c","drivers/gpu/drm/amd/display/dc/clk_mgr/dcn316/dcn316_clk_mgr.c","drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c","drivers/gpu/drm/amd/display/dc/core/dc.c","drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c","drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c","drivers/gpu/drm/amd/display/dc/dc_dmub_srv.h","drivers/gpu/drm/amd/display/dc/dc_helper.c","drivers/gpu/drm/amd/display/dc/dce/dmub_abm_lcd.c","drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c","drivers/gpu/drm/amd/display/dc/dce/dmub_outbox.c","drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c","drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubp.c","drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dio_link_encoder.c","drivers/gpu/drm/amd/display/dc/dcn31/dcn31_panel_cntl.c","drivers/gpu/drm/amd/display/dc/hwss/dcn21/dcn21_hwseq.c","drivers/gpu/drm/amd/display/dc/hwss/dcn30/dcn30_hwseq.c","drivers/gpu/drm/amd/display/dc/hwss/dcn31/dcn31_hwseq.c","drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c","drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c","drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.7","versionType":"semver"},{"version":"6.7.3","status":"unaffected","lessThanOrEqual":"6.7.*","versionType":"semver"},{"version":"6.8","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c","drivers/gpu/drm/amd/display/dc/bios/command_table2.c","drivers/gpu/drm/amd/display/dc/clk_mgr/dcn31/dcn31_clk_mgr.c","drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c","drivers/gpu/drm/amd/display/dc/clk_mgr/dcn315/dcn315_clk_mgr.c","drivers/gpu/drm/amd/display/dc/clk_mgr/dcn316/dcn316_clk_mgr.c","drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c","drivers/gpu/drm/amd/display/dc/core/dc.c","drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c","drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c","drivers/gpu/drm/amd/display/dc/dc_dmub_srv.h","drivers/gpu/drm/amd/display/dc/dc_helper.c","drivers/gpu/drm/amd/display/dc/dce/dmub_abm_lcd.c","drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c","drivers/gpu/drm/amd/display/dc/dce/dmub_outbox.c","drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c","drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubp.c","drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dio_link_encoder.c","drivers/gpu/drm/amd/display/dc/dcn31/dcn31_panel_cntl.c","drivers/gpu/drm/amd/display/dc/hwss/dcn21/dcn21_hwseq.c","drivers/gpu/drm/amd/display/dc/hwss/dcn30/dcn30_hwseq.c","drivers/gpu/drm/amd/display/dc/hwss/dcn31/dcn31_hwseq.c","drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c","drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c","drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia.c"]}],"references":["https://git.kernel.org/stable/c/303197775a97416b62d4da69280d0c120a20e009","https://git.kernel.org/stable/c/8892780834ae294bc3697c7d0e056d7743900b39"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/52xxx/CVE-2023-52485.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-52485","state":"PUBLISHED","datePublished":"2024-02-29T14:57:51.179Z","dateUpdated":"2026-08-15T12:23:52.004Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-02-20T12:30:33.301Z"},"containers":{"cna":{"title":"drm/amd/display: Wake DMCUB before sending a command","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Wake DMCUB before sending a command\n\n[Why]\nWe can hang in place trying to send commands when the DMCUB isn't\npowered on.\n\n[How]\nFor functions that execute within a DC context or DC lock we can\nwrap the direct calls to dm_execute_dmub_cmd/list with code that\nexits idle power optimizations and reallows once we're done with\nthe command submission on success.\n\nFor DM direct submissions the DM will need to manage the enter/exit\nsequencing manually.\n\nWe cannot invoke a DMCUB command directly within the DM execution\nhelper or we can deadlock."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"65138eb72e1fc687be49932b9a45325598ffa01c","status":"affected","lessThan":"303197775a97416b62d4da69280d0c120a20e009","versionType":"git"},{"version":"65138eb72e1fc687be49932b9a45325598ffa01c","status":"affected","lessThan":"8892780834ae294bc3697c7d0e056d7743900b39","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c","drivers/gpu/drm/amd/display/dc/bios/command_table2.c","drivers/gpu/drm/amd/display/dc/clk_mgr/dcn31/dcn31_clk_mgr.c","drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c","drivers/gpu/drm/amd/display/dc/clk_mgr/dcn315/dcn315_clk_mgr.c","drivers/gpu/drm/amd/display/dc/clk_mgr/dcn316/dcn316_clk_mgr.c","drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c","drivers/gpu/drm/amd/display/dc/core/dc.c","drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c","drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c","drivers/gpu/drm/amd/display/dc/dc_dmub_srv.h","drivers/gpu/drm/amd/display/dc/dc_helper.c","drivers/gpu/drm/amd/display/dc/dce/dmub_abm_lcd.c","drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c","drivers/gpu/drm/amd/display/dc/dce/dmub_outbox.c","drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c","drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubp.c","drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dio_link_encoder.c","drivers/gpu/drm/amd/display/dc/dcn31/dcn31_panel_cntl.c","drivers/gpu/drm/amd/display/dc/hwss/dcn21/dcn21_hwseq.c","drivers/gpu/drm/amd/display/dc/hwss/dcn30/dcn30_hwseq.c","drivers/gpu/drm/amd/display/dc/hwss/dcn31/dcn31_hwseq.c","drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c","drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c","drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.7","versionType":"semver"},{"version":"6.7.3","status":"unaffected","lessThanOrEqual":"6.7.*","versionType":"semver"},{"version":"6.8","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c","drivers/gpu/drm/amd/display/dc/bios/command_table2.c","drivers/gpu/drm/amd/display/dc/clk_mgr/dcn31/dcn31_clk_mgr.c","drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c","drivers/gpu/drm/amd/display/dc/clk_mgr/dcn315/dcn315_clk_mgr.c","drivers/gpu/drm/amd/display/dc/clk_mgr/dcn316/dcn316_clk_mgr.c","drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c","drivers/gpu/drm/amd/display/dc/core/dc.c","drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c","drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c","drivers/gpu/drm/amd/display/dc/dc_dmub_srv.h","drivers/gpu/drm/amd/display/dc/dc_helper.c","drivers/gpu/drm/amd/display/dc/dce/dmub_abm_lcd.c","drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c","drivers/gpu/drm/amd/display/dc/dce/dmub_outbox.c","drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c","drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubp.c","drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dio_link_encoder.c","drivers/gpu/drm/amd/display/dc/dcn31/dcn31_panel_cntl.c","drivers/gpu/drm/amd/display/dc/hwss/dcn21/dcn21_hwseq.c","drivers/gpu/drm/amd/display/dc/hwss/dcn30/dcn30_hwseq.c","drivers/gpu/drm/amd/display/dc/hwss/dcn31/dcn31_hwseq.c","drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c","drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c","drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/303197775a97416b62d4da69280d0c120a20e009"},{"url":"https://git.kernel.org/stable/c/8892780834ae294bc3697c7d0e056d7743900b39"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-15T12:23:52.004Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.7.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.8"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA 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