CVE-2025-37935 (GCVE-0-2025-37935)
Vulnerability from cvelistv5 – Published: 2025-05-20 15:21 – Updated: 2026-08-05 11:58
VLAI
EPSS
VEX
Title
net: ethernet: mtk_eth_soc: fix SER panic with 4GB+ RAM
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: ethernet: mtk_eth_soc: fix SER panic with 4GB+ RAM
If the mtk_poll_rx() function detects the MTK_RESETTING flag, it will
jump to release_desc and refill the high word of the SDP on the 4GB RFB.
Subsequently, mtk_rx_clean will process an incorrect SDP, leading to a
panic.
Add patch from MediaTek's SDK to resolve this.
Severity
9.8 (Critical)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
2d75891ebc09ba9cf30697dfd54497ef0220308f , < cb625f783f70dc6614f03612b8e64ad99cb0a13c
(git)
Affected: 2d75891ebc09ba9cf30697dfd54497ef0220308f , < 317013d1ad13524be02d60b9e98f08fbd13f8c14 (git) Affected: 2d75891ebc09ba9cf30697dfd54497ef0220308f , < 67619cf69dec5d1d7792808dfa548616742dd51d (git) Affected: 2d75891ebc09ba9cf30697dfd54497ef0220308f , < 6e0490fc36cdac696f96e57b61d93b9ae32e0f4c (git) |
guessed | |
| Linux | Linux |
Affected:
6.6
Unaffected: 0 , < 6.6 (semver) Unaffected: 6.6.90 , ≤ 6.6.* (semver) Unaffected: 6.12.28 , ≤ 6.12.* (semver) Unaffected: 6.14.6 , ≤ 6.14.* (semver) Unaffected: 6.15 , ≤ * (original_commit_for_fix) |
guessed |
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}
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"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 \u2014 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\u0027s receive and reset paths with no victim action required.\nS:U - The corrupted DMA address and the resulting panic stay within the kernel\u0027s 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 \u2014 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."
}
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"lastModified": "2026-07-30T06:22:34.727",
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"redhat_vex": {
"aggregate_severity": "None",
"current_release_date": "2026-06-30T10:25:54+00:00",
"cve": "CVE-2025-37935",
"id": "CVE-2025-37935",
"initial_release_date": "2025-05-20T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: net: ethernet: mtk_eth_soc: fix SER panic with 4GB+ RAM",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-37935.json",
"version": "3"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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