298 lines
16 KiB
JSON
298 lines
16 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-2026-74497",
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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": "2026-08-15T05:44:03.907Z",
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"datePublished": "2026-08-15T12:27:24.494Z",
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"dateUpdated": "2026-10-16T19:05:50.570Z"
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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": "2026-08-19T16:37:55.435Z"
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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\nALSA: usb-audio: Clamp frame size in implicit-feedback mode\n\nsnd_usb_handle_sync_urb() scales received sync packet sizes by the sender's\nstride and stores the result directly in out_packet->packet_size[i]. If a\nconnected USB device sends an oversized sync packet, this frame count can\nexceed ep->maxframesize.\n\nThe un-clamped frame count then propagates to the playback endpoint queue,\npotentially driving packet transfers beyond the endpoint's hardware frame\nlimits.\n\nCap the calculated frame count against ep->maxframesize in\nsnd_usb_handle_sync_urb() to prevent oversized packets from entering the\nplayback queue."
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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:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.4,
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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:L - The bug is reached via local ALSA USB-audio PCM syscalls (open/hw_params/prepare/trigger) that start isochronous streaming; once implicit-feedback playback is active, malicious inbound USB sync URB completions invoke snd_usb_handle_sync_urb() without any network path.\nAC:L - A malicious USB audio gadget can deterministically send oversized implicit-feedback sync isochronous packets during active playback; the attacker controls both the device firmware and timing, with no race or uncontrollable memory-layout dependency required.\nPR:N - Exploitation is driven by a connected malicious USB audio device sending crafted isochronous IN packets; the attacker needs no host account, kernel capability, or user-namespace privilege on the victim system once playback is running.\nUI:N - After implicit-feedback USB audio playback is started, the malicious device can continuously inject oversized sync packets without further victim interaction; no additional discretionary user actions are needed beyond normal streaming operation.\nS:U - Impact is confined to host-kernel USB-audio transfer-buffer corruption and crashes within the same kernel security authority; it does not constitute a VM escape, IOMMU bypass, or other cross-scope boundary violation.\nC:H - Uncapped frame counts stored in the playback queue propagate into URB preparation, causing out-of-bounds access against kernel-coherent USB DMA transfer buffers and adjacent heap memory, enabling information disclosure from corrupted kernel memory.\nI:H - Oversized packet_size values drive memset/copy and iso_frame_desc lengths beyond allocated URB buffer bounds in prepare_silent_urb() and prepare_playback_urb(), yielding controllable out-of-bounds kernel memory writes and heap corruption.\nA:H - The resulting kernel memory corruption and invalid oversized URB transfers trigger kernel oops/panic and repeatable audio-pipeline failure; related mitigations for this implicit-feedback packet-size mismatch explicitly document crash behavior from the same root cause."
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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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"sound/usb/endpoint.c"
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],
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"versions": [
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{
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"version": "28acb12014fb0c3e1edfdab1b1e3e266cf651550",
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"lessThan": "2d39fea6d3c19a2f5811d123114d92e3d0115fd1",
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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": "28acb12014fb0c3e1edfdab1b1e3e266cf651550",
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"lessThan": "09cf3dbbb4256a43feb91d2f51f274510a9ada47",
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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": "28acb12014fb0c3e1edfdab1b1e3e266cf651550",
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"lessThan": "cfa8d3e0e8b812c4db4d5241f62b6bdbab2bd7be",
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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": "28acb12014fb0c3e1edfdab1b1e3e266cf651550",
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"lessThan": "56ac3e7c90f6b45969c3fd07a98fad760ffd6901",
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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": "28acb12014fb0c3e1edfdab1b1e3e266cf651550",
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"lessThan": "be97fea7451d758881b95af78e900dd0d58a382a",
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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": "28acb12014fb0c3e1edfdab1b1e3e266cf651550",
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"lessThan": "2db4535d6af79276a64449201c5be5feffb31c64",
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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": "28acb12014fb0c3e1edfdab1b1e3e266cf651550",
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"lessThan": "53f0aa37eb945f3c983f61d12fc35eb33debb8a9",
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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": "28acb12014fb0c3e1edfdab1b1e3e266cf651550",
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"lessThan": "8d7a30c50c2e58a6839634ed0acde14466d1dc61",
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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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"sound/usb/endpoint.c"
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],
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"versions": [
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{
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"version": "3.8",
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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": "3.8",
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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": "5.10.265",
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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": "5.15.216",
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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": "6.1.183",
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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": "6.6.151",
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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": "6.12.103",
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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": "6.18.44",
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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": "7.1.8",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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": "3.8",
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"versionEndExcluding": "5.10.265"
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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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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "6.6.151"
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/2d39fea6d3c19a2f5811d123114d92e3d0115fd1"
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},
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{
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"url": "https://git.kernel.org/stable/c/09cf3dbbb4256a43feb91d2f51f274510a9ada47"
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},
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{
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"url": "https://git.kernel.org/stable/c/cfa8d3e0e8b812c4db4d5241f62b6bdbab2bd7be"
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},
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{
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"url": "https://git.kernel.org/stable/c/56ac3e7c90f6b45969c3fd07a98fad760ffd6901"
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},
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{
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"url": "https://git.kernel.org/stable/c/be97fea7451d758881b95af78e900dd0d58a382a"
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},
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{
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"url": "https://git.kernel.org/stable/c/2db4535d6af79276a64449201c5be5feffb31c64"
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},
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{
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"url": "https://git.kernel.org/stable/c/53f0aa37eb945f3c983f61d12fc35eb33debb8a9"
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},
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{
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"url": "https://git.kernel.org/stable/c/8d7a30c50c2e58a6839634ed0acde14466d1dc61"
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}
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],
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"title": "ALSA: usb-audio: Clamp frame size in implicit-feedback mode",
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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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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-74497",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T18:58:20.810517Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-16T19:05:50.570Z"
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}
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}
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]
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}
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} |