{"api_version":"1","generated_at":"2026-07-24T22:11:26+00:00","cve":"CVE-2026-64219","urls":{"html":"https://cve.report/CVE-2026-64219","api":"https://cve.report/api/cve/CVE-2026-64219.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64219","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64219"},"summary":{"title":"drm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async\n\n[Why&How]\ndc_process_dmub_aux_transfer_async() copies payload->length bytes into a\n16-byte stack buffer (dpaux.data[16]) guarded only by an ASSERT(), which\nis a no-op in release builds. If a caller ever passes length > 16 this\nresults in a stack buffer overflow via memcpy.\n\nAdditionally, link_index is used to dereference dc->links[] without\nbounds checking against dc->link_count, risking an out-of-bounds access.\n\nReplace the ASSERT with a hard runtime check that returns false when\npayload->length exceeds the destination buffer size, and add a bounds\ncheck for link_index before it is used.\n\n(cherry picked from commit ba4caa9fecdf7a38f98c878ad05a8a64148b6881)","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-24 16:16:49","updated_at":"2026-07-24 16:16:49"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/1c8c6e912f2945b2a3e669afca6b52174b88e86e","name":"https://git.kernel.org/stable/c/1c8c6e912f2945b2a3e669afca6b52174b88e86e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6c92f6d9600efa3ef0d9e560a2b52776d9803c29","name":"https://git.kernel.org/stable/c/6c92f6d9600efa3ef0d9e560a2b52776d9803c29","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1ecde19bfce6535bffddad1139ff466b6d401b8e","name":"https://git.kernel.org/stable/c/1ecde19bfce6535bffddad1139ff466b6d401b8e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/90c398e822ca76e40548df0c061dd4f93ea92d71","name":"https://git.kernel.org/stable/c/90c398e822ca76e40548df0c061dd4f93ea92d71","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d6590e3f766e3111dd1beaf88b9384d117acfa6b","name":"https://git.kernel.org/stable/c/d6590e3f766e3111dd1beaf88b9384d117acfa6b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/16a5fa57565afb6bf37e18129921c270c93d8e2b","name":"https://git.kernel.org/stable/c/16a5fa57565afb6bf37e18129921c270c93d8e2b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3265f3ed373fb8048be713aadcdf702579a0e53d","name":"https://git.kernel.org/stable/c/3265f3ed373fb8048be713aadcdf702579a0e53d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64219","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64219","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 d6590e3f766e3111dd1beaf88b9384d117acfa6b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 16a5fa57565afb6bf37e18129921c270c93d8e2b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 90c398e822ca76e40548df0c061dd4f93ea92d71 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 3265f3ed373fb8048be713aadcdf702579a0e53d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7.0.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.209 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.175 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.142 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.92 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.34 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.11 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * 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the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async\n\n[Why&How]\ndc_process_dmub_aux_transfer_async() copies payload->length bytes into a\n16-byte stack buffer (dpaux.data[16]) guarded only by an ASSERT(), which\nis a no-op in release builds. If a caller ever passes length > 16 this\nresults in a stack buffer overflow via memcpy.\n\nAdditionally, link_index is used to dereference dc->links[] without\nbounds checking against dc->link_count, risking an out-of-bounds access.\n\nReplace the ASSERT with a hard runtime check that returns false when\npayload->length exceeds the destination buffer size, and add a bounds\ncheck for link_index before it is used.\n\n(cherry picked from commit ba4caa9fecdf7a38f98c878ad05a8a64148b6881)"}],"providerMetadata":{"dateUpdated":"2026-07-24T15:23:06.379Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/d6590e3f766e3111dd1beaf88b9384d117acfa6b"},{"url":"https://git.kernel.org/stable/c/16a5fa57565afb6bf37e18129921c270c93d8e2b"},{"url":"https://git.kernel.org/stable/c/90c398e822ca76e40548df0c061dd4f93ea92d71"},{"url":"https://git.kernel.org/stable/c/3265f3ed373fb8048be713aadcdf702579a0e53d"},{"url":"https://git.kernel.org/stable/c/1ecde19bfce6535bffddad1139ff466b6d401b8e"},{"url":"https://git.kernel.org/stable/c/1c8c6e912f2945b2a3e669afca6b52174b88e86e"},{"url":"https://git.kernel.org/stable/c/6c92f6d9600efa3ef0d9e560a2b52776d9803c29"}],"title":"drm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64219","datePublished":"2026-07-24T15:23:06.379Z","dateReserved":"2026-07-19T15:36:31.770Z","dateUpdated":"2026-07-24T15:23:06.379Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-24 16:16:49","lastModifiedDate":"2026-07-24 16:16:49","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64219","Ordinal":"1","Title":"drm/amd/display: Validate payload length and link_index in dc_pr","CVE":"CVE-2026-64219","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64219","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async\n\n[Why&How]\ndc_process_dmub_aux_transfer_async() copies payload->length bytes into a\n16-byte stack buffer (dpaux.data[16]) guarded only by an ASSERT(), which\nis a no-op in release builds. If a caller ever passes length > 16 this\nresults in a stack buffer overflow via memcpy.\n\nAdditionally, link_index is used to dereference dc->links[] without\nbounds checking against dc->link_count, risking an out-of-bounds access.\n\nReplace the ASSERT with a hard runtime check that returns false when\npayload->length exceeds the destination buffer size, and add a bounds\ncheck for link_index before it is used.\n\n(cherry picked from commit ba4caa9fecdf7a38f98c878ad05a8a64148b6881)","Type":"Description","Title":"drm/amd/display: Validate payload length and link_index in dc_pr"}]}}}