298 lines
15 KiB
JSON
298 lines
15 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-2026-89441",
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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": "2026-09-11T19:38:34.703Z",
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"datePublished": "2026-09-11T19:43:10.083Z",
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"dateUpdated": "2026-10-30T12:31:41.816Z"
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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": "2026-10-30T12:31:41.816Z"
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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\nmmc: via-sdmmc: cancel card-detect work on remove\n\nDisabling the device interrupt and freeing the IRQ prevents new card-detect\nwork from being queued, but carddet_work already queued by the handler can\nstill run after via_sd_remove() returns. via_sdc_card_detect() recovers the\nhost through container_of() and dereferences its MMIO base; once remove()\nreturns the host can be freed, so that work would touch freed memory.\n\nCancel carddet_work after freeing the IRQ and before cancelling\nfinish_bh_work, which the card-detect handler can also queue. carddet_work\ncan re-enable the interrupt through via_reset_pcictrl(); mask it again\nafterwards.\n\nThis issue was found by an in-house static analysis tool and confirmed by\nmanual code review."
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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:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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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:L - The UAF is reached from via_sd_remove() on the VIA VT9530 PCI SD/MMC host when unbind, rmmod, or PCI hot-remove leaves carddet_work pending; no network, Bluetooth, or USB hotplug path enters this teardown.\nAC:L - CIR IRQ queues carddet_work and via_sdc_card_detect() sleeps in via_reset_pcictrl while the attacker retries PCI unbind/rebind, so both sides of the missing cancel_work_sync race are attacker-controlled and retryable; such UAFs score AC:L.\nPR:L - Per CNA driver-removal UAF precedent, including sibling CVE-2026-89440 on this same via-sdmmc driver, an unprivileged local user on a machine with this PCI reader can spray the freed host while teardown proceeds; init-namespace root is not required.\nUI:N - No victim action such as mounting media or opening a file is required; the attacker queues carddet_work (or uses in-flight CIR work) and coordinates with driver removal themselves.\nS:U - The use-after-free corrupts the host kernel's via_crdr_mmc_host/mmc_host heap object within the same security authority; it is not a VM escape, IOMMU/DMA isolation bypass, or sandbox breakout.\nC:H - via_sdc_card_detect() recovers the freed via_crdr_mmc_host via container_of() and dereferences its MMIO bases, lock, and mrq; this kernel heap UAF enables arbitrary read via slab reuse.\nI:H - The dangling worker performs MMIO writes (DMA soft-reset, via_reset_pcictrl), may queue finish_bh_work, and can re-enable PCIINTCTRL after free_irq, yielding heap-spray write and control-flow hijack primitives.\nA:H - Use-after-free of sdhost after iounmap and devm mmc_free_host causes a kernel oops or panic even when not fully exploited, so availability impact is High."
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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/mmc/host/via-sdmmc.c"
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],
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"versions": [
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{
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"version": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
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"lessThan": "28e8e9e1f3bdb75b611ea14c39775455528c4012",
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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": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
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"lessThan": "a32603f9b4dd0a1c3ea5845eec7c95f5f8741b3d",
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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": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
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"lessThan": "3ee1b5c8618a26811840bf9f45cb3120dac1e273",
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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": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
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"lessThan": "55d71c70f11d9f92c7d2653774001e98cb509deb",
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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": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
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"lessThan": "0a3c70191868fb007c03ff79693ad4e4b3fdcbb8",
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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": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
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"lessThan": "f7ff3027ef004a331ef911a4886f12bc2e996037",
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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": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
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"lessThan": "eaca730c6f5e3609df62a0469fb789235a93d276",
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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": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
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"lessThan": "57e5d877f898d5e5c9d672a77bb6bdd24f0d9bf5",
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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/mmc/host/via-sdmmc.c"
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],
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"versions": [
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{
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"version": "2.6.31",
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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": "2.6.31",
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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": "5.10.273",
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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": "5.15.224",
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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": "6.1.191",
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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": "6.6.160",
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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": "6.12.112",
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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": "6.18.50",
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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": "7.2.4",
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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": "2.6.31",
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"versionEndExcluding": "5.10.273"
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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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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/28e8e9e1f3bdb75b611ea14c39775455528c4012"
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},
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{
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"url": "https://git.kernel.org/stable/c/a32603f9b4dd0a1c3ea5845eec7c95f5f8741b3d"
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},
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{
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"url": "https://git.kernel.org/stable/c/3ee1b5c8618a26811840bf9f45cb3120dac1e273"
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},
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{
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"url": "https://git.kernel.org/stable/c/55d71c70f11d9f92c7d2653774001e98cb509deb"
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},
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{
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"url": "https://git.kernel.org/stable/c/0a3c70191868fb007c03ff79693ad4e4b3fdcbb8"
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},
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{
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"url": "https://git.kernel.org/stable/c/f7ff3027ef004a331ef911a4886f12bc2e996037"
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},
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{
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"url": "https://git.kernel.org/stable/c/eaca730c6f5e3609df62a0469fb789235a93d276"
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},
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{
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"url": "https://git.kernel.org/stable/c/57e5d877f898d5e5c9d672a77bb6bdd24f0d9bf5"
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}
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],
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"title": "mmc: via-sdmmc: cancel card-detect work on remove",
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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-2026-89441",
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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": "2026-10-16T19:22:13.294951Z"
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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": "2026-10-16T19:26:38.639Z"
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}
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}
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]
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}
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} |