264 lines
14 KiB
JSON
264 lines
14 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-93280",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-17T16:02:15.098Z",
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"datePublished": "2026-09-24T15:52:22.253Z",
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"dateUpdated": "2026-10-19T09:08:34.610Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-19T09:08:34.610Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/staging/greybus/audio_gb.c"
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],
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"versions": [
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{
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"version": "184992e305f1de3a3d5fa446da3a2bc76be7c54a",
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"lessThan": "ba86de9f7b0d7903d2df5ea2373e34d8ca3fc43e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "184992e305f1de3a3d5fa446da3a2bc76be7c54a",
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"lessThan": "dd5593aee0a0fb353e1164aff7b65e563fe1f232",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "184992e305f1de3a3d5fa446da3a2bc76be7c54a",
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"lessThan": "6f764363b3173d805be11e59a8f23ecee2d420d5",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "184992e305f1de3a3d5fa446da3a2bc76be7c54a",
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"lessThan": "52daf9de692ebac813d110eb1e677dc0e1f4a5ab",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "184992e305f1de3a3d5fa446da3a2bc76be7c54a",
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"lessThan": "d0f6eaba60705bacd9bb4ce48eab50ef3f546777",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "184992e305f1de3a3d5fa446da3a2bc76be7c54a",
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"lessThan": "c9191f2e2f35f1209eb2dc24b31129dd47b48c16",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "184992e305f1de3a3d5fa446da3a2bc76be7c54a",
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"lessThan": "cfcc5a41a9664eb68023aae4cd0d485b256bd7c7",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "184992e305f1de3a3d5fa446da3a2bc76be7c54a",
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"lessThan": "33d8c7b794d2a30637c9d3fcb478f1d3222bef1e",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/staging/greybus/audio_gb.c"
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],
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"versions": [
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{
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"version": "4.9",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "4.9",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.270",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.221",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.188",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.157",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.110",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.52",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.6",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.9",
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"versionEndExcluding": "5.10.270"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.9",
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"versionEndExcluding": "5.15.221"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.9",
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"versionEndExcluding": "6.1.188"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.9",
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"versionEndExcluding": "6.6.157"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.9",
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"versionEndExcluding": "6.12.110"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.9",
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"versionEndExcluding": "6.18.52"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.9",
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"versionEndExcluding": "7.2.6"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.9",
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"versionEndExcluding": "7.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/ba86de9f7b0d7903d2df5ea2373e34d8ca3fc43e"
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},
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{
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"url": "https://git.kernel.org/stable/c/dd5593aee0a0fb353e1164aff7b65e563fe1f232"
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},
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{
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"url": "https://git.kernel.org/stable/c/6f764363b3173d805be11e59a8f23ecee2d420d5"
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},
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{
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"url": "https://git.kernel.org/stable/c/52daf9de692ebac813d110eb1e677dc0e1f4a5ab"
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},
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{
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"url": "https://git.kernel.org/stable/c/d0f6eaba60705bacd9bb4ce48eab50ef3f546777"
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},
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{
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"url": "https://git.kernel.org/stable/c/c9191f2e2f35f1209eb2dc24b31129dd47b48c16"
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},
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{
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"url": "https://git.kernel.org/stable/c/cfcc5a41a9664eb68023aae4cd0d485b256bd7c7"
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},
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{
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"url": "https://git.kernel.org/stable/c/33d8c7b794d2a30637c9d3fcb478f1d3222bef1e"
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}
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],
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"title": "greybus: audio: bound the topology section sizes against the fetched size",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |