{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-37935", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:23.971Z", "datePublished": "2025-05-20T15:21:59.381Z", "dateUpdated": "2026-08-05T11:58:28.431Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:58:28.431Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: mtk_eth_soc: fix SER panic with 4GB+ RAM\n\nIf the mtk_poll_rx() function detects the MTK_RESETTING flag, it will\njump to release_desc and refill the high word of the SDP on the 4GB RFB.\nSubsequently, mtk_rx_clean will process an incorrect SDP, leading to a\npanic.\n\nAdd patch from MediaTek's SDK to resolve this." } ], "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 vulnerable code is the ethernet RX NAPI descriptor-recycling path, executed for every frame received on a WAN/LAN-facing port of an MT7988 router SoC, and the state that triggers it (RX FIFO overflow, free-queue-empty, DMA hang, atomic allocation failure) is produced by a sustained inbound packet flood that can be routed from anywhere. No local access or L2 adjacency is required to deliver the traffic.\nAC:L - An attacker driving sustained traffic reliably produces the RFIFO_OV/FQ_EMPTY/DMA-hang conditions that schedule SER, and once MTK_RESETTING is set every in-flight NAPI descriptor deterministically takes the release_desc path and gets its ADDR64 clobbered; the 4GB-straddling buffer placement that makes the corruption harmful is the default state on any affected 4GB+ board.\nPR:N - Triggering requires only sending network frames to the device — there is no credential check, socket ownership, or capability gate anywhere between packet arrival and mtk_poll_rx().\nUI:N - The corruption occurs entirely within the driver's receive and reset paths with no victim action required.\nS:U - The corrupted DMA address and the resulting panic stay within the kernel's own security authority; no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - Because the re-armed descriptor points at the wrong physical page, the buffer handed up as an skb contains stale kernel memory rather than the received frame, and on a router that content can be forwarded back onto the wire; the bogus dma_unmap_single() over unrelated physical memory compounds the exposure.\nI:H - The RX DMA engine is handed a descriptor whose 36-bit address is off by up to 4GB, so the NIC writes attacker-supplied packet bytes into arbitrary unrelated kernel memory — an out-of-bounds DMA write with attacker-controlled contents that is leverageable for control-flow hijacking.\nA:H - The documented symptom is a kernel panic when mtk_rx_clean() unmaps the corrupted SDP during system error recovery, taking the entire device down." } ] } ], "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": "2d75891ebc09ba9cf30697dfd54497ef0220308f", "lessThan": "cb625f783f70dc6614f03612b8e64ad99cb0a13c", "status": "affected", "versionType": "git" }, { "version": "2d75891ebc09ba9cf30697dfd54497ef0220308f", "lessThan": "317013d1ad13524be02d60b9e98f08fbd13f8c14", "status": "affected", "versionType": "git" }, { "version": "2d75891ebc09ba9cf30697dfd54497ef0220308f", "lessThan": "67619cf69dec5d1d7792808dfa548616742dd51d", "status": "affected", "versionType": "git" }, { "version": "2d75891ebc09ba9cf30697dfd54497ef0220308f", "lessThan": "6e0490fc36cdac696f96e57b61d93b9ae32e0f4c", "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": "6.6", "status": "affected" }, { "version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.90", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.28", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.14.6", "lessThanOrEqual": "6.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.15", "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": "6.6", "versionEndExcluding": "6.6.90" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.12.28" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.14.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.15" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/cb625f783f70dc6614f03612b8e64ad99cb0a13c" }, { "url": "https://git.kernel.org/stable/c/317013d1ad13524be02d60b9e98f08fbd13f8c14" }, { "url": "https://git.kernel.org/stable/c/67619cf69dec5d1d7792808dfa548616742dd51d" }, { "url": "https://git.kernel.org/stable/c/6e0490fc36cdac696f96e57b61d93b9ae32e0f4c" } ], "title": "net: ethernet: mtk_eth_soc: fix SER panic with 4GB+ RAM", "x_generator": { "engine": "bippy-1.2.0" } } } }