{"api_version":"1","generated_at":"2026-06-04T11:56:12+00:00","cve":"CVE-2026-46263","urls":{"html":"https://cve.report/CVE-2026-46263","api":"https://cve.report/api/cve/CVE-2026-46263.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-46263","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-46263"},"summary":{"title":"drm/amd/display: Fix out-of-bounds stream encoder index v3","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix out-of-bounds stream encoder index v3\n\neng_id can be negative and that stream_enc_regs[]\ncan be indexed out of bounds.\n\neng_id is used directly as an index into stream_enc_regs[], which has\nonly 5 entries. When eng_id is 5 (ENGINE_ID_DIGF) or negative, this can\naccess memory past the end of the array.\n\nAdd a bounds check using ARRAY_SIZE() before using eng_id as an index.\nThe unsigned cast also rejects negative values.\n\nThis avoids out-of-bounds access.\n\nFixes the below smatch error:\ndcn*_resource.c: stream_encoder_create() may index\nstream_enc_regs[eng_id] out of bounds (size 5).\n\ndrivers/gpu/drm/amd/amdgpu/../display/dc/resource/dcn351/dcn351_resource.c\n    1246 static struct stream_encoder *dcn35_stream_encoder_create(\n    1247         enum engine_id eng_id,\n    1248         struct dc_context *ctx)\n    1249 {\n\n    ...\n\n    1255\n    1256         /* Mapping of VPG, AFMT, DME register blocks to DIO block instance */\n    1257         if (eng_id <= ENGINE_ID_DIGF) {\n\nENGINE_ID_DIGF is 5.  should <= be <?\n\nUnrelated but, ugh, why is Smatch saying that \"eng_id\" can be negative?\nend_id is type signed long, but there are checks in the caller which prevent it from being negative.\n\n    1258                 vpg_inst = eng_id;\n    1259                 afmt_inst = eng_id;\n    1260         } else\n    1261                 return NULL;\n    1262\n\n    ...\n\n    1281\n    1282         dcn35_dio_stream_encoder_construct(enc1, ctx, ctx->dc_bios,\n    1283                                         eng_id, vpg, afmt,\n--> 1284                                         &stream_enc_regs[eng_id],\n                                                  ^^^^^^^^^^^^^^^^^^^^^^^ This stream_enc_regs[] array has 5 elements so we are one element beyond the end of the array.\n\n    ...\n\n    1287         return &enc1->base;\n    1288 }\n\nv2: use explicit bounds check as suggested by Roman/Dan; avoid unsigned int cast\n\nv3: The compiler already knows how to compare the two values, so the\n    cast (int) is not needed. (Roman)","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-03 18:16:27","updated_at":"2026-06-03 18:16:27"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/29f3824b08a98d41ecbbfd33580630d7607f962e","name":"https://git.kernel.org/stable/c/29f3824b08a98d41ecbbfd33580630d7607f962e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/263e28add4f4472cfa95150d218955d1945aa413","name":"https://git.kernel.org/stable/c/263e28add4f4472cfa95150d218955d1945aa413","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/abde491143e4e12eecc41337910aace4e8d59603","name":"https://git.kernel.org/stable/c/abde491143e4e12eecc41337910aace4e8d59603","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ca3808d560ad946ab6d089fd1f5bee04b952ead4","name":"https://git.kernel.org/stable/c/ca3808d560ad946ab6d089fd1f5bee04b952ead4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-46263","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46263","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2728e9c7c84235d2d7bc1403174d071ffc82d6d2 29f3824b08a98d41ecbbfd33580630d7607f962e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2728e9c7c84235d2d7bc1403174d071ffc82d6d2 263e28add4f4472cfa95150d218955d1945aa413 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2728e9c7c84235d2d7bc1403174d071ffc82d6d2 ca3808d560ad946ab6d089fd1f5bee04b952ead4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2728e9c7c84235d2d7bc1403174d071ffc82d6d2 abde491143e4e12eecc41337910aace4e8d59603 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.9","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.9 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.75 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.14 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.4 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/gpu/drm/amd/display/dc/resource/dcn315/dcn315_resource.c","drivers/gpu/drm/amd/display/dc/resource/dcn316/dcn316_resource.c","drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource.c","drivers/gpu/drm/amd/display/dc/resource/dcn321/dcn321_resource.c","drivers/gpu/drm/amd/display/dc/resource/dcn35/dcn35_resource.c","drivers/gpu/drm/amd/display/dc/resource/dcn351/dcn351_resource.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"29f3824b08a98d41ecbbfd33580630d7607f962e","status":"affected","version":"2728e9c7c84235d2d7bc1403174d071ffc82d6d2","versionType":"git"},{"lessThan":"263e28add4f4472cfa95150d218955d1945aa413","status":"affected","version":"2728e9c7c84235d2d7bc1403174d071ffc82d6d2","versionType":"git"},{"lessThan":"ca3808d560ad946ab6d089fd1f5bee04b952ead4","status":"affected","version":"2728e9c7c84235d2d7bc1403174d071ffc82d6d2","versionType":"git"},{"lessThan":"abde491143e4e12eecc41337910aace4e8d59603","status":"affected","version":"2728e9c7c84235d2d7bc1403174d071ffc82d6d2","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/gpu/drm/amd/display/dc/resource/dcn315/dcn315_resource.c","drivers/gpu/drm/amd/display/dc/resource/dcn316/dcn316_resource.c","drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource.c","drivers/gpu/drm/amd/display/dc/resource/dcn321/dcn321_resource.c","drivers/gpu/drm/amd/display/dc/resource/dcn35/dcn35_resource.c","drivers/gpu/drm/amd/display/dc/resource/dcn351/dcn351_resource.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.9"},{"lessThan":"6.9","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.75","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.14","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.75","versionStartIncluding":"6.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.14","versionStartIncluding":"6.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.4","versionStartIncluding":"6.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"6.9","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix out-of-bounds stream encoder index v3\n\neng_id can be negative and that stream_enc_regs[]\ncan be indexed out of bounds.\n\neng_id is used directly as an index into stream_enc_regs[], which has\nonly 5 entries. When eng_id is 5 (ENGINE_ID_DIGF) or negative, this can\naccess memory past the end of the array.\n\nAdd a bounds check using ARRAY_SIZE() before using eng_id as an index.\nThe unsigned cast also rejects negative values.\n\nThis avoids out-of-bounds access.\n\nFixes the below smatch error:\ndcn*_resource.c: stream_encoder_create() may index\nstream_enc_regs[eng_id] out of bounds (size 5).\n\ndrivers/gpu/drm/amd/amdgpu/../display/dc/resource/dcn351/dcn351_resource.c\n    1246 static struct stream_encoder *dcn35_stream_encoder_create(\n    1247         enum engine_id eng_id,\n    1248         struct dc_context *ctx)\n    1249 {\n\n    ...\n\n    1255\n    1256         /* Mapping of VPG, AFMT, DME register blocks to DIO block instance */\n    1257         if (eng_id <= ENGINE_ID_DIGF) {\n\nENGINE_ID_DIGF is 5.  should <= be <?\n\nUnrelated but, ugh, why is Smatch saying that \"eng_id\" can be negative?\nend_id is type signed long, but there are checks in the caller which prevent it from being negative.\n\n    1258                 vpg_inst = eng_id;\n    1259                 afmt_inst = eng_id;\n    1260         } else\n    1261                 return NULL;\n    1262\n\n    ...\n\n    1281\n    1282         dcn35_dio_stream_encoder_construct(enc1, ctx, ctx->dc_bios,\n    1283                                         eng_id, vpg, afmt,\n--> 1284                                         &stream_enc_regs[eng_id],\n                                                  ^^^^^^^^^^^^^^^^^^^^^^^ This stream_enc_regs[] array has 5 elements so we are one element beyond the end of the array.\n\n    ...\n\n    1287         return &enc1->base;\n    1288 }\n\nv2: use explicit bounds check as suggested by Roman/Dan; avoid unsigned int cast\n\nv3: The compiler already knows how to compare the two values, so the\n    cast (int) is not needed. (Roman)"}],"providerMetadata":{"dateUpdated":"2026-06-03T15:50:02.572Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/29f3824b08a98d41ecbbfd33580630d7607f962e"},{"url":"https://git.kernel.org/stable/c/263e28add4f4472cfa95150d218955d1945aa413"},{"url":"https://git.kernel.org/stable/c/ca3808d560ad946ab6d089fd1f5bee04b952ead4"},{"url":"https://git.kernel.org/stable/c/abde491143e4e12eecc41337910aace4e8d59603"}],"title":"drm/amd/display: Fix out-of-bounds stream encoder index v3","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-46263","datePublished":"2026-06-03T15:50:02.572Z","dateReserved":"2026-05-13T15:03:33.108Z","dateUpdated":"2026-06-03T15:50:02.572Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-03 18:16:27","lastModifiedDate":"2026-06-03 18:16:27","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"46263","Ordinal":"1","Title":"drm/amd/display: Fix out-of-bounds stream encoder index v3","CVE":"CVE-2026-46263","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"46263","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix out-of-bounds stream encoder index v3\n\neng_id can be negative and that stream_enc_regs[]\ncan be indexed out of bounds.\n\neng_id is used directly as an index into stream_enc_regs[], which has\nonly 5 entries. When eng_id is 5 (ENGINE_ID_DIGF) or negative, this can\naccess memory past the end of the array.\n\nAdd a bounds check using ARRAY_SIZE() before using eng_id as an index.\nThe unsigned cast also rejects negative values.\n\nThis avoids out-of-bounds access.\n\nFixes the below smatch error:\ndcn*_resource.c: stream_encoder_create() may index\nstream_enc_regs[eng_id] out of bounds (size 5).\n\ndrivers/gpu/drm/amd/amdgpu/../display/dc/resource/dcn351/dcn351_resource.c\n    1246 static struct stream_encoder *dcn35_stream_encoder_create(\n    1247         enum engine_id eng_id,\n    1248         struct dc_context *ctx)\n    1249 {\n\n    ...\n\n    1255\n    1256         /* Mapping of VPG, AFMT, DME register blocks to DIO block instance */\n    1257         if (eng_id <= ENGINE_ID_DIGF) {\n\nENGINE_ID_DIGF is 5.  should <= be <?\n\nUnrelated but, ugh, why is Smatch saying that \"eng_id\" can be negative?\nend_id is type signed long, but there are checks in the caller which prevent it from being negative.\n\n    1258                 vpg_inst = eng_id;\n    1259                 afmt_inst = eng_id;\n    1260         } else\n    1261                 return NULL;\n    1262\n\n    ...\n\n    1281\n    1282         dcn35_dio_stream_encoder_construct(enc1, ctx, ctx->dc_bios,\n    1283                                         eng_id, vpg, afmt,\n--> 1284                                         &stream_enc_regs[eng_id],\n                                                  ^^^^^^^^^^^^^^^^^^^^^^^ This stream_enc_regs[] array has 5 elements so we are one element beyond the end of the array.\n\n    ...\n\n    1287         return &enc1->base;\n    1288 }\n\nv2: use explicit bounds check as suggested by Roman/Dan; avoid unsigned int cast\n\nv3: The compiler already knows how to compare the two values, so the\n    cast (int) is not needed. (Roman)","Type":"Description","Title":"drm/amd/display: Fix out-of-bounds stream encoder index v3"}]}}}