{"id":"CVE-2026-43337","revision":"943109d65c2140028ae8fdc62adaf271","records":[{"revision":"943109d65c2140028ae8fdc62adaf271","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-43337","aliases":[],"title":"drm/amd/display: Fix NULL pointer dereference in dcn401_init_hw()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix NULL pointer dereference in dcn401_init_hw()\n\ndcn401_init_hw() assumes that update_bw_bounding_box() is valid when\nentering the update path. However, the existing condition:\n\n  ((!fams2_enable && update_bw_bounding_box) || freq_changed)\n\ndoes not guarantee this, as the freq_changed branch can evaluate to true\nindependently of the callback pointer.\n\nThis can result in calling update_bw_bounding_box() when it is NULL.\n\nFix this by separating the update condition from the pointer checks and\nensuring the callback, dc->clk_mgr, and bw_params are validated before\nuse.\n\nFixes the below:\n../dc/hwss/dcn401/dcn401_hwseq.c:367 dcn401_init_hw() error: we previously assumed 'dc->res_pool->funcs->update_bw_bounding_box' could be null (see line 362)\n\n(cherry picked from commit 86117c5ab42f21562fedb0a64bffea3ee5fcd477)","state":0,"publishedAt":"2026-05-08T13:31:22.967+00:00","modifiedAt":"2026-10-21T12:40:39.405+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/hwss/dcn401/dcn401_hwseq.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"ca0fb243c3bb53dbbd71d16c76f319bf923ee3d4\",\n                            \"lessThan\": \"fcc51c81cb472eb460310c477460356dc4845ff7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ca0fb243c3bb53dbbd71d16c76f319bf923ee3d4\",\n                            \"lessThan\": \"10c13c111d0d7f8e101c742feff264fc98e3f9f7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ca0fb243c3bb53dbbd71d16c76f319bf923ee3d4\",\n                            \"lessThan\": \"2d4a6f0702c5211e0be8b688c5fc24f082ec74d6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ca0fb243c3bb53dbbd71d16c76f319bf923ee3d4\",\n                            \"lessThan\": \"e927b36ae18b66b49219eaa9f46edc7b4fdbb25e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e13689793b9c0e7b5749954e77f5f85e68fe7138\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.11.3\",\n                            \"lessThan\": \"6.12\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\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/hwss/dcn401/dcn401_hwseq.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.12\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.12\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.114\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.22\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.12\",\n                            \"lessThanOrEqual\": \"6.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/fcc51c81cb472eb460310c477460356dc4845ff7","https://git.kernel.org/stable/c/10c13c111d0d7f8e101c742feff264fc98e3f9f7","https://git.kernel.org/stable/c/2d4a6f0702c5211e0be8b688c5fc24f082ec74d6","https://git.kernel.org/stable/c/e927b36ae18b66b49219eaa9f46edc7b4fdbb25e"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43337","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-43337","identifiers":["CVE-2026-43337"]},"retained":false,"historicalAffected":[]}],"coverage":[]}