{"id":"CVE-2026-80704","title":"drm/amd/display: use proper context for logging","summary":"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_c…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 1296423bf23c7a58133970e223b1f47ec6570308 < 07b52a41765722ec971e0cd9739b140bf4933998","Linux >= 1296423bf23c7a58133970e223b1f47ec6570308 < a94e62b7c7018fcfe0251e53fa96af30f12d923a","Linux >= 1296423bf23c7a58133970e223b1f47ec6570308 < 02647d98340738f918690ed227fdcf154db1b84a","Linux >= 1296423bf23c7a58133970e223b1f47ec6570308 < f556bc844cc4423e5ad41ae41a4c24f1cf75b978","Linux >= 1296423bf23c7a58133970e223b1f47ec6570308 < 114b42507b6a23d9d24e24e4ef165233332c64d4","Linux 4.17"],"published":"2026-08-28","updated":"2026-10-21","sourceUpdated":"2026-10-21T12:46:58.375Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80704","references":[{"url":"https://git.kernel.org/stable/c/07b52a41765722ec971e0cd9739b140bf4933998"},{"url":"https://git.kernel.org/stable/c/a94e62b7c7018fcfe0251e53fa96af30f12d923a"},{"url":"https://git.kernel.org/stable/c/02647d98340738f918690ed227fdcf154db1b84a"},{"url":"https://git.kernel.org/stable/c/f556bc844cc4423e5ad41ae41a4c24f1cf75b978"},{"url":"https://git.kernel.org/stable/c/114b42507b6a23d9d24e24e4ef165233332c64d4"}],"tags":["cve.org"],"epss":0.0016,"epssPercentile":0.04725,"ingestedAt":"2026-10-21T12:48:53.750Z","slug":"CVE-2026-80704","body":"## Overview\n\nIn 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)\n\n## Affected\n\n- `Linux >= 1296423bf23c7a58133970e223b1f47ec6570308 < 07b52a41765722ec971e0cd9739b140bf4933998`\n- `Linux >= 1296423bf23c7a58133970e223b1f47ec6570308 < a94e62b7c7018fcfe0251e53fa96af30f12d923a`\n- `Linux >= 1296423bf23c7a58133970e223b1f47ec6570308 < 02647d98340738f918690ed227fdcf154db1b84a`\n- `Linux >= 1296423bf23c7a58133970e223b1f47ec6570308 < f556bc844cc4423e5ad41ae41a4c24f1cf75b978`\n- `Linux >= 1296423bf23c7a58133970e223b1f47ec6570308 < 114b42507b6a23d9d24e24e4ef165233332c64d4`\n- `Linux 4.17`\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":[]}