{"api_version":"1","generated_at":"2026-10-15T02:26:12+00:00","cve":"CVE-2026-72146","urls":{"html":"https://cve.report/CVE-2026-72146","api":"https://cve.report/api/cve/CVE-2026-72146.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-72146","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-72146"},"summary":{"title":"dmaengine: sh: rz-dmac: Move interrupt request after everything is set up","description":"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().","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:21:32","updated_at":"2026-08-19 17:21:00"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"8.4","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.4,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"8.4","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":8.4,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/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/5b12de6229d662864ee22c11d4876652b40120f0","name":"https://git.kernel.org/stable/c/5b12de6229d662864ee22c11d4876652b40120f0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2a4d9e2234c3f817bb0ddbc8680d09ce9be84f93","name":"https://git.kernel.org/stable/c/2a4d9e2234c3f817bb0ddbc8680d09ce9be84f93","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ec9f66c91bffdb69d309bae6dfb387562db7ebc8","name":"https://git.kernel.org/stable/c/ec9f66c91bffdb69d309bae6dfb387562db7ebc8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d24d53323e817d79a4bd111bd10b34dbc96e64a8","name":"https://git.kernel.org/stable/c/d24d53323e817d79a4bd111bd10b34dbc96e64a8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0e0c5b3cf374ebf3c589741751e1fbc67f53ec2f","name":"https://git.kernel.org/stable/c/0e0c5b3cf374ebf3c589741751e1fbc67f53ec2f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/07ae600bd353b22f31a8f1007269744fafc7f123","name":"https://git.kernel.org/stable/c/07ae600bd353b22f31a8f1007269744fafc7f123","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/731712403ddb39d1a76a11abf339a0615bc85de7","name":"https://git.kernel.org/stable/c/731712403ddb39d1a76a11abf339a0615bc85de7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72146","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72146","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5000d37042a61ca556fde2782ca40dbfa802ea16 d24d53323e817d79a4bd111bd10b34dbc96e64a8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5000d37042a61ca556fde2782ca40dbfa802ea16 0e0c5b3cf374ebf3c589741751e1fbc67f53ec2f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5000d37042a61ca556fde2782ca40dbfa802ea16 5b12de6229d662864ee22c11d4876652b40120f0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5000d37042a61ca556fde2782ca40dbfa802ea16 2a4d9e2234c3f817bb0ddbc8680d09ce9be84f93 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.101 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.42 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"72146","cve":"CVE-2026-72146","epss":"0.001800000","percentile":"0.079010000","score_date":"2026-08-19","updated_at":"2026-08-20 00:13:09"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/dma/sh/rz-dmac.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"d24d53323e817d79a4bd111bd10b34dbc96e64a8","status":"affected","version":"5000d37042a61ca556fde2782ca40dbfa802ea16","versionType":"git"},{"lessThan":"0e0c5b3cf374ebf3c589741751e1fbc67f53ec2f","status":"affected","version":"5000d37042a61ca556fde2782ca40dbfa802ea16","versionType":"git"},{"lessThan":"5b12de6229d662864ee22c11d4876652b40120f0","status":"affected","version":"5000d37042a61ca556fde2782ca40dbfa802ea16","versionType":"git"},{"lessThan":"2a4d9e2234c3f817bb0ddbc8680d09ce9be84f93","status":"affected","version":"5000d37042a61ca556fde2782ca40dbfa802ea16","versionType":"git"},{"lessThan":"ec9f66c91bffdb69d309bae6dfb387562db7ebc8","status":"affected","version":"5000d37042a61ca556fde2782ca40dbfa802ea16","versionType":"git"},{"lessThan":"07ae600bd353b22f31a8f1007269744fafc7f123","status":"affected","version":"5000d37042a61ca556fde2782ca40dbfa802ea16","versionType":"git"},{"lessThan":"731712403ddb39d1a76a11abf339a0615bc85de7","status":"affected","version":"5000d37042a61ca556fde2782ca40dbfa802ea16","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/dma/sh/rz-dmac.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.15"},{"lessThan":"5.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.216","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.183","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.148","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.101","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.42","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.216","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.183","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.148","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.101","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.42","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"5.15","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","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()."}],"metrics":[{"cvssV3_1":{"baseScore":8.4,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","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."}]}],"providerMetadata":{"dateUpdated":"2026-08-19T16:36:26.048Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/d24d53323e817d79a4bd111bd10b34dbc96e64a8"},{"url":"https://git.kernel.org/stable/c/0e0c5b3cf374ebf3c589741751e1fbc67f53ec2f"},{"url":"https://git.kernel.org/stable/c/5b12de6229d662864ee22c11d4876652b40120f0"},{"url":"https://git.kernel.org/stable/c/2a4d9e2234c3f817bb0ddbc8680d09ce9be84f93"},{"url":"https://git.kernel.org/stable/c/ec9f66c91bffdb69d309bae6dfb387562db7ebc8"},{"url":"https://git.kernel.org/stable/c/07ae600bd353b22f31a8f1007269744fafc7f123"},{"url":"https://git.kernel.org/stable/c/731712403ddb39d1a76a11abf339a0615bc85de7"}],"title":"dmaengine: sh: rz-dmac: Move interrupt request after everything is set up","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-72146","datePublished":"2026-08-15T05:53:18.431Z","dateReserved":"2026-08-09T03:40:39.908Z","dateUpdated":"2026-08-19T16:36:26.048Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:21:32","lastModifiedDate":"2026-08-19 17:21:00","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.4,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.5,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"72146","Ordinal":"1","Title":"dmaengine: sh: rz-dmac: Move interrupt request after everything ","CVE":"CVE-2026-72146","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"72146","Ordinal":"1","NoteData":"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().","Type":"Description","Title":"dmaengine: sh: rz-dmac: Move interrupt request after everything "}]}}}