{"api_version":"1","generated_at":"2026-08-12T00:07:59+00:00","cve":"CVE-2026-68235","urls":{"html":"https://cve.report/CVE-2026-68235","api":"https://cve.report/api/cve/CVE-2026-68235.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-68235","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-68235"},"summary":{"title":"drm/amd/display: dce100: skip non-DP stream encoders for DP MST","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: dce100: skip non-DP stream encoders for DP MST\n\nOn DCE8-class ASICs (e.g. Bonaire), the resource pool contains digital\nDIG stream encoders plus one analog DAC encoder. When assigning a stream\nencoder for a second DisplayPort MST stream, if the preferred digital\nencoder is already acquired, dce100_find_first_free_match_stream_enc_for_link()\nfalls back to the first free pool entry. That entry may be the analog\nencoder, whose funcs table lacks DP hooks such as dp_set_stream_attribute.\nThe subsequent atomic commit then dereferences NULL function pointers in\nlink_set_dpms_on() and crashes.\n\nSkip encoders without dp_set_stream_attribute when the stream uses a DP\nsignal (including MST). Use dc_is_dp_signal(stream->signal) for the MST\nfallback path instead of checking only the link connector signal.\n\nTested on:\n- GPU: AMD Radeon R7 260X (Bonaire / DCE8)\n- Board: Supermicro C9X299-PG300\n- Setup: DP MST daisy chain, hotplug second monitor or have it connected on boot\n- Kernel: 7.1.3 (issue observed since 6.19)\n- Result: kernel oops without patch; dual monitors stable with patch\n\n(cherry picked from commit 28ec64943e3ee4d9b8d30cea61e380f1429953a8)","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-10 13:20:11","updated_at":"2026-08-10 13:20:11"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/d340cba0df4cf327c7e89c7c1a4e79d4771d7dd5","name":"https://git.kernel.org/stable/c/d340cba0df4cf327c7e89c7c1a4e79d4771d7dd5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ed2d86aef9fa4c43f82da0fca91a60f7326d7d03","name":"https://git.kernel.org/stable/c/ed2d86aef9fa4c43f82da0fca91a60f7326d7d03","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/51ea665c30c424c98959101f3bf6f48ab42949c8","name":"https://git.kernel.org/stable/c/51ea665c30c424c98959101f3bf6f48ab42949c8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bfe28ce019c2d667d98071262da33d8bba122919","name":"https://git.kernel.org/stable/c/bfe28ce019c2d667d98071262da33d8bba122919","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-68235","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68235","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 bfe28ce019c2d667d98071262da33d8bba122919 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 51ea665c30c424c98959101f3bf6f48ab42949c8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ed2d86aef9fa4c43f82da0fca91a60f7326d7d03 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 d340cba0df4cf327c7e89c7c1a4e79d4771d7dd5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.12.101 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18.42 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7.1.6 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.101 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.42 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.6 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc4 * 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/dce100/dce100_resource.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"bfe28ce019c2d667d98071262da33d8bba122919","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"51ea665c30c424c98959101f3bf6f48ab42949c8","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"ed2d86aef9fa4c43f82da0fca91a60f7326d7d03","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"d340cba0df4cf327c7e89c7c1a4e79d4771d7dd5","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"6.12.101","status":"affected","version":"0","versionType":"semver"},{"lessThan":"6.18.42","status":"affected","version":"0","versionType":"semver"},{"lessThan":"7.1.6","status":"affected","version":"0","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/gpu/drm/amd/display/dc/resource/dce100/dce100_resource.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.101","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.42","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc4","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.101","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.42","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc4","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: dce100: skip non-DP stream encoders for DP MST\n\nOn DCE8-class ASICs (e.g. Bonaire), the resource pool contains digital\nDIG stream encoders plus one analog DAC encoder. When assigning a stream\nencoder for a second DisplayPort MST stream, if the preferred digital\nencoder is already acquired, dce100_find_first_free_match_stream_enc_for_link()\nfalls back to the first free pool entry. That entry may be the analog\nencoder, whose funcs table lacks DP hooks such as dp_set_stream_attribute.\nThe subsequent atomic commit then dereferences NULL function pointers in\nlink_set_dpms_on() and crashes.\n\nSkip encoders without dp_set_stream_attribute when the stream uses a DP\nsignal (including MST). Use dc_is_dp_signal(stream->signal) for the MST\nfallback path instead of checking only the link connector signal.\n\nTested on:\n- GPU: AMD Radeon R7 260X (Bonaire / DCE8)\n- Board: Supermicro C9X299-PG300\n- Setup: DP MST daisy chain, hotplug second monitor or have it connected on boot\n- Kernel: 7.1.3 (issue observed since 6.19)\n- Result: kernel oops without patch; dual monitors stable with patch\n\n(cherry picked from commit 28ec64943e3ee4d9b8d30cea61e380f1429953a8)"}],"providerMetadata":{"dateUpdated":"2026-08-10T12:01:00.099Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/bfe28ce019c2d667d98071262da33d8bba122919"},{"url":"https://git.kernel.org/stable/c/51ea665c30c424c98959101f3bf6f48ab42949c8"},{"url":"https://git.kernel.org/stable/c/ed2d86aef9fa4c43f82da0fca91a60f7326d7d03"},{"url":"https://git.kernel.org/stable/c/d340cba0df4cf327c7e89c7c1a4e79d4771d7dd5"}],"title":"drm/amd/display: dce100: skip non-DP stream encoders for DP MST","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-68235","datePublished":"2026-08-10T12:01:00.099Z","dateReserved":"2026-07-30T09:28:09.376Z","dateUpdated":"2026-08-10T12:01:00.099Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-10 13:20:11","lastModifiedDate":"2026-08-10 13:20:11","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"68235","Ordinal":"1","Title":"drm/amd/display: dce100: skip non-DP stream encoders for DP MST","CVE":"CVE-2026-68235","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"68235","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: dce100: skip non-DP stream encoders for DP MST\n\nOn DCE8-class ASICs (e.g. Bonaire), the resource pool contains digital\nDIG stream encoders plus one analog DAC encoder. When assigning a stream\nencoder for a second DisplayPort MST stream, if the preferred digital\nencoder is already acquired, dce100_find_first_free_match_stream_enc_for_link()\nfalls back to the first free pool entry. That entry may be the analog\nencoder, whose funcs table lacks DP hooks such as dp_set_stream_attribute.\nThe subsequent atomic commit then dereferences NULL function pointers in\nlink_set_dpms_on() and crashes.\n\nSkip encoders without dp_set_stream_attribute when the stream uses a DP\nsignal (including MST). Use dc_is_dp_signal(stream->signal) for the MST\nfallback path instead of checking only the link connector signal.\n\nTested on:\n- GPU: AMD Radeon R7 260X (Bonaire / DCE8)\n- Board: Supermicro C9X299-PG300\n- Setup: DP MST daisy chain, hotplug second monitor or have it connected on boot\n- Kernel: 7.1.3 (issue observed since 6.19)\n- Result: kernel oops without patch; dual monitors stable with patch\n\n(cherry picked from commit 28ec64943e3ee4d9b8d30cea61e380f1429953a8)","Type":"Description","Title":"drm/amd/display: dce100: skip non-DP stream encoders for DP MST"}]}}}