243 lines
13 KiB
JSON
243 lines
13 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-2026-72146",
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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": "2026-08-09T03:40:39.908Z",
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"datePublished": "2026-08-15T05:53:18.431Z",
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"dateUpdated": "2026-08-19T16:36:26.048Z"
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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": "2026-08-19T16:36:26.048Z"
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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\ndmaengine: sh: rz-dmac: Move interrupt request after everything is set up\n\nOnce the interrupt is requested, the interrupt handler may run immediately.\nSince the IRQ handler can access channel->ch_base, which is initialized\nonly after requesting the IRQ, this may lead to invalid memory access.\nLikewise, the IRQ thread may access uninitialized data (the ld_free,\nld_queue, and ld_active lists), which may also lead to issues.\n\nRequest the interrupts only after everything is set up. To keep the error\npath simpler, use dmam_alloc_coherent() instead of dma_alloc_coherent()."
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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 flaw triggers in rz_dmac_chan_probe() during Renesas RZ/G2L/V2H/T2H platform DMAC driver initialization at boot or module load; there is no network, Bluetooth, or runtime syscall path to the vulnerable devm_request_threaded_irq() ordering.\nAC:L - Once the DMAC channel IRQ line is asserted when devm_request_threaded_irq() is called after reset_deassert, the hardirq/thread handlers run immediately before ch_base or lists are initialized; stale post-reset interrupt state on these SoCs makes this timing plausible without luck.\nPR:N - rz_dmac_probe() performs no capability or authentication checks before requesting per-channel IRQs; on affected Renesas embedded boards the vulnerable probe sequence runs automatically during kernel boot without the attacker holding Linux privileges.\nUI:N - No victim action is required; pending/latched DMAC channel interrupts during driver probe at boot or reboot can invoke the buggy handlers without anyone opening device nodes or configuring DMA transfers.\nS:U - Impact is kernel NULL dereference, list/spinlock corruption, and MMIO faults within the host kernel; this is not a VM escape, container sandbox breakout, or documented IOMMU security-boundary bypass.\nC:H - The threaded IRQ handler may lock an uninitialized vc.lock and walk uninitialized ld_active/ld_queue/ld_free lists, causing invalid kernel memory reads and list-metadata exposure beyond a pure bounded fault.\nI:H - The hardirq path issues readl/writel through uninitialized ch_base (NULL/low MMIO), and list/spinlock corruption in the IRQ thread can corrupt kernel heap metadata and enable control-flow hijack primitives.\nA:H - Invalid MMIO via NULL ch_base and corrupted IRQ-thread list handling can cause kernel oops/panic during probe on affected embedded systems, causing full loss of availability until reboot."
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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/dma/sh/rz-dmac.c"
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],
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"versions": [
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{
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"version": "5000d37042a61ca556fde2782ca40dbfa802ea16",
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"lessThan": "d24d53323e817d79a4bd111bd10b34dbc96e64a8",
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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": "5000d37042a61ca556fde2782ca40dbfa802ea16",
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"lessThan": "0e0c5b3cf374ebf3c589741751e1fbc67f53ec2f",
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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": "5000d37042a61ca556fde2782ca40dbfa802ea16",
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"lessThan": "5b12de6229d662864ee22c11d4876652b40120f0",
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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": "5000d37042a61ca556fde2782ca40dbfa802ea16",
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"lessThan": "2a4d9e2234c3f817bb0ddbc8680d09ce9be84f93",
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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": "5000d37042a61ca556fde2782ca40dbfa802ea16",
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"lessThan": "ec9f66c91bffdb69d309bae6dfb387562db7ebc8",
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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": "5000d37042a61ca556fde2782ca40dbfa802ea16",
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"lessThan": "07ae600bd353b22f31a8f1007269744fafc7f123",
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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": "5000d37042a61ca556fde2782ca40dbfa802ea16",
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"lessThan": "731712403ddb39d1a76a11abf339a0615bc85de7",
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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/dma/sh/rz-dmac.c"
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],
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"versions": [
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{
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"version": "5.15",
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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": "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": "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": "6.6.148",
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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": "6.12.101",
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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": "6.18.42",
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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": "7.1.5",
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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": "5.15",
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"versionEndExcluding": "5.15.216"
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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": "5.15",
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"versionEndExcluding": "6.1.183"
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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": "5.15",
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"versionEndExcluding": "6.6.148"
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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": "5.15",
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"versionEndExcluding": "6.12.101"
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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": "5.15",
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"versionEndExcluding": "6.18.42"
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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": "5.15",
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"versionEndExcluding": "7.1.5"
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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": "5.15",
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"versionEndExcluding": "7.2"
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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/d24d53323e817d79a4bd111bd10b34dbc96e64a8"
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},
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{
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"url": "https://git.kernel.org/stable/c/0e0c5b3cf374ebf3c589741751e1fbc67f53ec2f"
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},
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{
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"url": "https://git.kernel.org/stable/c/5b12de6229d662864ee22c11d4876652b40120f0"
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},
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{
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"url": "https://git.kernel.org/stable/c/2a4d9e2234c3f817bb0ddbc8680d09ce9be84f93"
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},
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{
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"url": "https://git.kernel.org/stable/c/ec9f66c91bffdb69d309bae6dfb387562db7ebc8"
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},
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{
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"url": "https://git.kernel.org/stable/c/07ae600bd353b22f31a8f1007269744fafc7f123"
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},
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{
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"url": "https://git.kernel.org/stable/c/731712403ddb39d1a76a11abf339a0615bc85de7"
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}
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],
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"title": "dmaengine: sh: rz-dmac: Move interrupt request after everything is set up",
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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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} |