{"api_version":"1","generated_at":"2026-10-27T04:01:47+00:00","cve":"CVE-2026-90371","urls":{"html":"https://cve.report/CVE-2026-90371","api":"https://cve.report/api/cve/CVE-2026-90371.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90371","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90371"},"summary":{"title":"wifi: mt76: fix RXDMAD_C buffer recycling race","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: fix RXDMAD_C buffer recycling race\n\nThe RXDMAD_C buffers come from the RRO data queues' page pools, which are\nbound to a different NAPI, so the direct page-pool recycle used here could\nrace the owning NAPI; take the non-direct path as is already done for WED\nRX queues.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:36","updated_at":"2026-10-19 09:19:31"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"8.8","severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"8.8","severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:A/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/a273dc3b86a7d983d643827d3d3c795d55d8f632","name":"https://git.kernel.org/stable/c/a273dc3b86a7d983d643827d3d3c795d55d8f632","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7ac05ed3a50e511c93f8506e555709a208dfce0a","name":"https://git.kernel.org/stable/c/7ac05ed3a50e511c93f8506e555709a208dfce0a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e1f97c10a4ec2b9db69a134b757304399ca903ce","name":"https://git.kernel.org/stable/c/e1f97c10a4ec2b9db69a134b757304399ca903ce","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90371","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90371","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e50d4d710efd2dbc46965e9608bbb502bcfc5c99 7ac05ed3a50e511c93f8506e555709a208dfce0a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e50d4d710efd2dbc46965e9608bbb502bcfc5c99 a273dc3b86a7d983d643827d3d3c795d55d8f632 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e50d4d710efd2dbc46965e9608bbb502bcfc5c99 e1f97c10a4ec2b9db69a134b757304399ca903ce git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"90371","cve":"CVE-2026-90371","epss":"0.003180000","percentile":"0.248820000","score_date":"2026-09-21","updated_at":"2026-09-22 00:03:19"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/wireless/mediatek/mt76/dma.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"7ac05ed3a50e511c93f8506e555709a208dfce0a","status":"affected","version":"e50d4d710efd2dbc46965e9608bbb502bcfc5c99","versionType":"git"},{"lessThan":"a273dc3b86a7d983d643827d3d3c795d55d8f632","status":"affected","version":"e50d4d710efd2dbc46965e9608bbb502bcfc5c99","versionType":"git"},{"lessThan":"e1f97c10a4ec2b9db69a134b757304399ca903ce","status":"affected","version":"e50d4d710efd2dbc46965e9608bbb502bcfc5c99","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/wireless/mediatek/mt76/dma.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.18"},{"lessThan":"6.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"6.18","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: fix RXDMAD_C buffer recycling race\n\nThe RXDMAD_C buffers come from the RRO data queues' page pools, which are\nbound to a different NAPI, so the direct page-pool recycle used here could\nrace the owning NAPI; take the non-direct path as is already done for WED\nRX queues."}],"metrics":[{"cvssV3_1":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:A - Received 802.11 frames are completed by HW-RRO v3.1 into the RXDMAD_C ring; mt7996_irq_handler/mt7996_irq_tasklet schedules napi[MT_RXQ_RRO_RXDMAD_C] and mt76_dma_rx_poll→mt76_dma_rx_process→mt76_dma_get_rxdmad_c_buf recycles those payload pages. A radio-range peer supplies the frames; WiFi is adjacent, not a routable IP transport.\nAC:L - The attacker drives both NAPIs by flooding 802.11 traffic: the RRO data-queue NAPI runs mt76_dma_rx_fill→page_pool_alloc_frag on the owning pool, while RXDMAD_C drops completions (SDL0 vs SKB_WITH_OVERHEAD of MT7996_RX_BUF_SIZE, or extra frags in mt76_add_fragment) and calls mt76_put_page_pool_buf(..., true) into the same unlocked alloc.cache.\nPR:N - mt76_dma_get_rxdmad_c_buf runs on the WiFi RX DMA completion path with no host credential check; a nearby unauthenticated station can send frames that HW-RRO v3.1 writes into RXDMAD_C (rx_token_id/SDL0) without any kernel account.\nUI:N - With the mt7996/mt7992 interface already up in HWRRO v3.1, the attacker triggers mt76_dma_rx_process on MT_RXQ_RRO_RXDMAD_C solely by transmitting frames; no mount, click, or other victim action is required.\nS:U - The race corrupts the host kernel page_pool alloc.cache for the RRO data queues (dev->q_rx[t->qid]->page_pool) in the same kernel; it does not cross a VM, IOMMU, or guest/host boundary.\nC:H - Concurrent lockless updates of pool->alloc.cache/count in page_pool_recycle_in_cache versus page_pool_alloc_frag can issue the same RX page twice or return a stale pointer, a use-after-free of packet buffers that enables disclosure of kernel or packet memory.\nI:H - The same unlocked recycle can bump alloc.count past PP_ALLOC_CACHE_SIZE so a later page_pool_recycle_in_cache writes a netmem pointer out of bounds, and a double-issued page lets attacker-controlled 802.11 DMA clobber reused kernel memory.\nA:H - A corrupted page_pool alloc.cache yields invalid page pointers and use-after-free in mt76_dma_rx_fill/mt76_dma_rx_process, which oopses or panics the kernel."}]}],"providerMetadata":{"dateUpdated":"2026-10-19T09:02:30.177Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/7ac05ed3a50e511c93f8506e555709a208dfce0a"},{"url":"https://git.kernel.org/stable/c/a273dc3b86a7d983d643827d3d3c795d55d8f632"},{"url":"https://git.kernel.org/stable/c/e1f97c10a4ec2b9db69a134b757304399ca903ce"}],"title":"wifi: mt76: fix RXDMAD_C buffer recycling race","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90371","datePublished":"2026-09-17T16:09:12.046Z","dateReserved":"2026-09-11T19:38:34.808Z","dateUpdated":"2026-10-19T09:02:30.177Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:36","lastModifiedDate":"2026-10-19 09:19:31","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90371","Ordinal":"1","Title":"wifi: mt76: fix RXDMAD_C buffer recycling race","CVE":"CVE-2026-90371","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90371","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: fix RXDMAD_C buffer recycling race\n\nThe RXDMAD_C buffers come from the RRO data queues' page pools, which are\nbound to a different NAPI, so the direct page-pool recycle used here could\nrace the owning NAPI; take the non-direct path as is already done for WED\nRX queues.","Type":"Description","Title":"wifi: mt76: fix RXDMAD_C buffer recycling race"}]}}}