{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-80694", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.785Z", "datePublished": "2026-08-28T06:53:00.442Z", "dateUpdated": "2026-10-21T12:46:55.044Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:46:55.044Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: mtk_eth_soc: pass eth to mtk_handle_irq_rx in poll_controller\n\nmtk_handle_irq_rx expects a struct mtk_eth * (matching the request_irq\ncookie), but mtk_poll_controller incorrectly passed the net_device *.\nCalling ndo_poll_controller with CONFIG_NET_POLL_CONTROLLER enabled\nwould then crash." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL" }, "scenarios": [ { "lang": "en", "value": "AV:N - The bug is only reachable via ndo_poll_controller called from netpoll during netconsole transmit polling on the mtk netdev; on MediaTek routers/gateways with netconsole on the primary ethernet interface, remote network traffic that triggers kernel logging and netpoll send retries can invoke the corrupt path without local access.\nAC:L - Once netconsole is bound to the mtk interface, netpoll_poll_dev calls mtk_poll_controller deterministically during log transmission and skb allocation retries, without races or attacker-dependent timing beyond routine network activity.\nPR:N - Exploitation requires no attacker credentials or capabilities; only an administrator-preconfigured netconsole target on the mtk netdev (an environmental prerequisite), after which any unprivileged remote party can trigger the path by causing kernel log emission.\nUI:N - No victim user action is required beyond normal system operation; triggering relies on automated kernel logging and netpoll activity, not on a user opening files, mounting filesystems, or interacting with the UI.\nS:U - Impact is confined to kernel memory corruption and crash within the same kernel security authority; this is not a VM escape, sandbox breakout, or cross-authority boundary violation.\nC:H - Casting net_device to mtk_eth causes reads of attacker-influenced adjacent memory through napi_schedule_prep and potential MMIO via a misinterpreted soc/base pointer, constituting exploitable type confusion rather than a bounded NULL dereference.\nI:H - The mistyped pointer causes an unconditional increment at the mtk_eth rx_events offset (writing into net_device/adjacent heap memory) and may corrupt or schedule a bogus NAPI structure, giving memory corruption primitives.\nA:H - The fix commit and handler logic confirm the mistyped pointer leads to invalid structure access and likely kernel oops/panic when netpoll_controller is invoked, causing complete loss of availability on affected devices." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/mediatek/mtk_eth_soc.c" ], "versions": [ { "version": "8186f6e382d8719d0a4bc0ef218c4dd7cf55b496", "lessThan": "a9133c4d335e48ba92f4daed10c506378924f976", "status": "affected", "versionType": "git" }, { "version": "8186f6e382d8719d0a4bc0ef218c4dd7cf55b496", "lessThan": "3bd58ac9ca0c552651f533c1bd280dd19ae7d4e8", "status": "affected", "versionType": "git" }, { "version": "8186f6e382d8719d0a4bc0ef218c4dd7cf55b496", "lessThan": "276f1f180f55d56cf5992a581e20ed2b3dfa6ced", "status": "affected", "versionType": "git" }, { "version": "8186f6e382d8719d0a4bc0ef218c4dd7cf55b496", "lessThan": "7eb46318d53940dab63dea7130e720b67a656104", "status": "affected", "versionType": "git" }, { "version": "8186f6e382d8719d0a4bc0ef218c4dd7cf55b496", "lessThan": "e095f249e2209674f6366f6db0383a2b96e19239", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/mediatek/mtk_eth_soc.c" ], "versions": [ { "version": "4.8", "status": "affected" }, { "version": "0", "lessThan": "4.8", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.103", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.44", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.8", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.6.160" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.12.103" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.18.44" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "7.1.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/a9133c4d335e48ba92f4daed10c506378924f976" }, { "url": "https://git.kernel.org/stable/c/3bd58ac9ca0c552651f533c1bd280dd19ae7d4e8" }, { "url": "https://git.kernel.org/stable/c/276f1f180f55d56cf5992a581e20ed2b3dfa6ced" }, { "url": "https://git.kernel.org/stable/c/7eb46318d53940dab63dea7130e720b67a656104" }, { "url": "https://git.kernel.org/stable/c/e095f249e2209674f6366f6db0383a2b96e19239" } ], "title": "net: ethernet: mtk_eth_soc: pass eth to mtk_handle_irq_rx in poll_controller", "x_generator": { "engine": "bippy-1.2.0" } } } }