{"api_version":"1","generated_at":"2026-09-25T08:35:36+00:00","cve":"CVE-2026-93280","urls":{"html":"https://cve.report/CVE-2026-93280","api":"https://cve.report/api/cve/CVE-2026-93280.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-93280","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-93280"},"summary":{"title":"greybus: audio: bound the topology section sizes against the fetched size","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ngreybus: audio: bound the topology section sizes against the fetched size\n\ngb_audio_gb_get_topology() fetches a topology blob of a module-supplied\nsize, and gbaudio_tplg_parse_data() then walks it by adding the\nmodule-supplied size_dais, size_controls and size_widgets fields to\nform the control, widget and route section offsets. Those le32 sizes\nare never checked against the fetched blob, so a module reporting a\nsmall topology size but large section sizes makes the offsets point\npast the allocation, and parsing reads out of bounds.\n\nReject a topology whose section sizes do not fit within the fetched\nsize before it is parsed.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-24 16:17:25","updated_at":"2026-09-25 05:17:01"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"8.8","severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"8.8","severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/dd5593aee0a0fb353e1164aff7b65e563fe1f232","name":"https://git.kernel.org/stable/c/dd5593aee0a0fb353e1164aff7b65e563fe1f232","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c9191f2e2f35f1209eb2dc24b31129dd47b48c16","name":"https://git.kernel.org/stable/c/c9191f2e2f35f1209eb2dc24b31129dd47b48c16","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6f764363b3173d805be11e59a8f23ecee2d420d5","name":"https://git.kernel.org/stable/c/6f764363b3173d805be11e59a8f23ecee2d420d5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d0f6eaba60705bacd9bb4ce48eab50ef3f546777","name":"https://git.kernel.org/stable/c/d0f6eaba60705bacd9bb4ce48eab50ef3f546777","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/52daf9de692ebac813d110eb1e677dc0e1f4a5ab","name":"https://git.kernel.org/stable/c/52daf9de692ebac813d110eb1e677dc0e1f4a5ab","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/33d8c7b794d2a30637c9d3fcb478f1d3222bef1e","name":"https://git.kernel.org/stable/c/33d8c7b794d2a30637c9d3fcb478f1d3222bef1e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cfcc5a41a9664eb68023aae4cd0d485b256bd7c7","name":"https://git.kernel.org/stable/c/cfcc5a41a9664eb68023aae4cd0d485b256bd7c7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ba86de9f7b0d7903d2df5ea2373e34d8ca3fc43e","name":"https://git.kernel.org/stable/c/ba86de9f7b0d7903d2df5ea2373e34d8ca3fc43e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93280","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93280","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 184992e305f1de3a3d5fa446da3a2bc76be7c54a ba86de9f7b0d7903d2df5ea2373e34d8ca3fc43e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 184992e305f1de3a3d5fa446da3a2bc76be7c54a dd5593aee0a0fb353e1164aff7b65e563fe1f232 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 184992e305f1de3a3d5fa446da3a2bc76be7c54a 6f764363b3173d805be11e59a8f23ecee2d420d5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 184992e305f1de3a3d5fa446da3a2bc76be7c54a 52daf9de692ebac813d110eb1e677dc0e1f4a5ab git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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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/staging/greybus/audio_gb.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"ba86de9f7b0d7903d2df5ea2373e34d8ca3fc43e","status":"affected","version":"184992e305f1de3a3d5fa446da3a2bc76be7c54a","versionType":"git"},{"lessThan":"dd5593aee0a0fb353e1164aff7b65e563fe1f232","status":"affected","version":"184992e305f1de3a3d5fa446da3a2bc76be7c54a","versionType":"git"},{"lessThan":"6f764363b3173d805be11e59a8f23ecee2d420d5","status":"affected","version":"184992e305f1de3a3d5fa446da3a2bc76be7c54a","versionType":"git"},{"lessThan":"52daf9de692ebac813d110eb1e677dc0e1f4a5ab","status":"affected","version":"184992e305f1de3a3d5fa446da3a2bc76be7c54a","versionType":"git"},{"lessThan":"d0f6eaba60705bacd9bb4ce48eab50ef3f546777","status":"affected","version":"184992e305f1de3a3d5fa446da3a2bc76be7c54a","versionType":"git"},{"lessThan":"c9191f2e2f35f1209eb2dc24b31129dd47b48c16","status":"affected","version":"184992e305f1de3a3d5fa446da3a2bc76be7c54a","versionType":"git"},{"lessThan":"cfcc5a41a9664eb68023aae4cd0d485b256bd7c7","status":"affected","version":"184992e305f1de3a3d5fa446da3a2bc76be7c54a","versionType":"git"},{"lessThan":"33d8c7b794d2a30637c9d3fcb478f1d3222bef1e","status":"affected","version":"184992e305f1de3a3d5fa446da3a2bc76be7c54a","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/staging/greybus/audio_gb.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.9"},{"lessThan":"4.9","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.270","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.221","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.270","versionStartIncluding":"4.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"4.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"4.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"4.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"4.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"4.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"4.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"4.9","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ngreybus: audio: bound the topology section sizes against the fetched size\n\ngb_audio_gb_get_topology() fetches a topology blob of a module-supplied\nsize, and gbaudio_tplg_parse_data() then walks it by adding the\nmodule-supplied size_dais, size_controls and size_widgets fields to\nform the control, widget and route section offsets. Those le32 sizes\nare never checked against the fetched blob, so a module reporting a\nsmall topology size but large section sizes makes the offsets point\npast the allocation, and parsing reads out of bounds.\n\nReject a topology whose section sizes do not fit within the fetched\nsize before it is parsed."}],"metrics":[{"cvssV3_1":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:A - The malformed bytes are size_dais/size_controls/size_widgets in the GB_AUDIO_TYPE_GET_TOPOLOGY response that gb_audio_probe() fetches via gb_audio_gb_get_topology()→gb_operation_sync(); on BeaglePlay that Greybus payload is delivered by hdlc_rx_greybus_frame() from the CC1352 802.15.4 SVC, so a radio-range module supplies the blob, not a routable IP peer.\nAC:L - A module that returns a small GET_TOPOLOGY_SIZE and then oversized le32 size_* fields makes gbaudio_tplg_process_header() compute control_offset/widget_offset past the kzalloc() blob on every gb_audio_probe(); the attacker fully controls those fields and no race or uninfluenced host state is required.\nPR:N - gb_svc_process_module_inserted()→gb_module_add()→gb_interface_enable()→greybus_probe()→gb_audio_probe() runs with no capable() or host-uid check, and CAP authentication is a separate optional ioctl, not a gate on this path; the attacking module needs no Linux account.\nUI:N - gb_audio_probe() itself calls gb_audio_gb_get_topology() and gbaudio_tplg_parse_data() as soon as a GREYBUS_CLASS_AUDIO bundle is registered; no victim ioctl, ALSA open, or mount is required.\nS:U - The over-read and snprintf() stores corrupt the host kernel topology allocation and adjacent slab inside the same kernel authority; this is not a KVM/Xen guest-to-host escape or an IOMMU/DMA bypass.\nC:H - gbaudio_tplg_process_kcontrols() and gbaudio_tplg_create_widget() read gb_audio_control/widget fields from the OOB offset, and gb_generate_enum_strings() walks names with an unbounded while (*data != '\\0') past the blob, disclosing adjacent kernel heap (and those strings can later appear as ALSA enum names).\nI:H - With curr/w pointing past the topology object, snprintf(curr->name, sizeof(curr->name), \"GB %d %s\", ...) in gbaudio_tplg_process_kcontrols() and snprintf(w->name, ...) in gbaudio_tplg_create_widget() perform 32-byte out-of-bounds writes at an attacker-chosen size_dais+size_controls offset, a heap write primitive.\nA:H - Walking those OOB control/widget pointers and the unbounded enum-name scan can fault on an unmapped page during gb_audio_probe() and oops the kernel; the module can re-insert to repeat it."}]}],"providerMetadata":{"dateUpdated":"2026-09-25T05:09:57.962Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/ba86de9f7b0d7903d2df5ea2373e34d8ca3fc43e"},{"url":"https://git.kernel.org/stable/c/dd5593aee0a0fb353e1164aff7b65e563fe1f232"},{"url":"https://git.kernel.org/stable/c/6f764363b3173d805be11e59a8f23ecee2d420d5"},{"url":"https://git.kernel.org/stable/c/52daf9de692ebac813d110eb1e677dc0e1f4a5ab"},{"url":"https://git.kernel.org/stable/c/d0f6eaba60705bacd9bb4ce48eab50ef3f546777"},{"url":"https://git.kernel.org/stable/c/c9191f2e2f35f1209eb2dc24b31129dd47b48c16"},{"url":"https://git.kernel.org/stable/c/cfcc5a41a9664eb68023aae4cd0d485b256bd7c7"},{"url":"https://git.kernel.org/stable/c/33d8c7b794d2a30637c9d3fcb478f1d3222bef1e"}],"title":"greybus: audio: bound the topology section sizes against the fetched size","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-93280","datePublished":"2026-09-24T15:52:22.253Z","dateReserved":"2026-09-17T16:02:15.098Z","dateUpdated":"2026-09-25T05:09:57.962Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-24 16:17:25","lastModifiedDate":"2026-09-25 05:17:01","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"93280","Ordinal":"1","Title":"greybus: audio: bound the topology section sizes against the fet","CVE":"CVE-2026-93280","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"93280","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ngreybus: audio: bound the topology section sizes against the fetched size\n\ngb_audio_gb_get_topology() fetches a topology blob of a module-supplied\nsize, and gbaudio_tplg_parse_data() then walks it by adding the\nmodule-supplied size_dais, size_controls and size_widgets fields to\nform the control, widget and route section offsets. Those le32 sizes\nare never checked against the fetched blob, so a module reporting a\nsmall topology size but large section sizes makes the offsets point\npast the allocation, and parsing reads out of bounds.\n\nReject a topology whose section sizes do not fit within the fetched\nsize before it is parsed.","Type":"Description","Title":"greybus: audio: bound the topology section sizes against the fet"}]}}}