{"id":"CVE-2026-80704","revision":"8b2ae0dd5ea54d21b142532b5b757f8e","records":[{"revision":"8b2ae0dd5ea54d21b142532b5b757f8e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80704","aliases":[],"title":"drm/amd/display: use proper context for logging","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: use proper context for logging\n\nThe same as the rest of the code, get_ss_info_from_atombios() uses\ncalc_pll_cs->ctx->logger for logging. But calc_pll_cs->ctx is\ninitialized only later in calc_pll_max_vco_construct(). Therefore, any\noutput using DC_LOG_SYNC() leads to a NULL pointer deference in\nget_ss_info_from_atombios().\n\nAccording to Sashiko, the very same problem exists in\ndce112_get_pix_clk_dividers() and dcn3_get_pix_clk_dividers() too.\n\nTo avoid accessing the NULL context, use clk_src->base.ctx->logger\neverywhere. That context in base is initialized earlier in\ndce110_clk_src_construct() and dce112_clk_src_construct(). Before\nget_ss_info_from_atombios() or Sashiko's get_pix_clk_dividers functions\nabove are actually called. This is done by redefining DC_LOGGER to\nCTX->logger.\n\nBefore:\ndce110_clk_src_construct() did:\n -> sets clk_src->base.ctx = ctx;\n -> ss_info_from_atombios_create()\n   -> get_ss_info_from_atombios()   <- uses calc_pll_cs->ctx  # BOOM\n -> calc_pll_max_vco_construct()    <- sets calc_pll_cs->ctx\n\nAfter:\ndce110_clk_src_construct() does:\n -> sets clk_src->base.ctx = ctx;\n -> ss_info_from_atombios_create()\n   -> get_ss_info_from_atombios()   <- uses clk_src->base.ctx\n\n(cherry picked from commit 6f16fcbb0c46a87e3d9685407e906573d60104b0)","state":0,"publishedAt":"2026-08-28T06:53:06.442+00:00","modifiedAt":"2026-10-21T12:46:58.375+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/amd/display/dc/dce/dce_clock_source.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"1296423bf23c7a58133970e223b1f47ec6570308\",\n                            \"lessThan\": \"07b52a41765722ec971e0cd9739b140bf4933998\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1296423bf23c7a58133970e223b1f47ec6570308\",\n                            \"lessThan\": \"a94e62b7c7018fcfe0251e53fa96af30f12d923a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1296423bf23c7a58133970e223b1f47ec6570308\",\n                            \"lessThan\": \"02647d98340738f918690ed227fdcf154db1b84a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1296423bf23c7a58133970e223b1f47ec6570308\",\n                            \"lessThan\": \"f556bc844cc4423e5ad41ae41a4c24f1cf75b978\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1296423bf23c7a58133970e223b1f47ec6570308\",\n                            \"lessThan\": \"114b42507b6a23d9d24e24e4ef165233332c64d4\",\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/amd/display/dc/dce/dce_clock_source.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.17\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.17\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.160\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.103\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.44\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.8\",\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":[],"references":["https://git.kernel.org/stable/c/07b52a41765722ec971e0cd9739b140bf4933998","https://git.kernel.org/stable/c/a94e62b7c7018fcfe0251e53fa96af30f12d923a","https://git.kernel.org/stable/c/02647d98340738f918690ed227fdcf154db1b84a","https://git.kernel.org/stable/c/f556bc844cc4423e5ad41ae41a4c24f1cf75b978","https://git.kernel.org/stable/c/114b42507b6a23d9d24e24e4ef165233332c64d4"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80704","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80704","identifiers":["CVE-2026-80704"]},"retained":false,"historicalAffected":[]}],"coverage":[]}