CVE-2026-74410 (GCVE-0-2026-74410)
Vulnerability from cvelistv5
Published
2026-08-15 05:59
Modified
2026-08-17 05:46
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
wifi: rtw88: fix OOB read from firmware RX descriptor exceeding DMA buffer
In rtw_pci_rx_napi(), new_len is computed as the sum of pkt_len (14-bit
descriptor field, max 16383) and pkt_offset (drv_info_sz + shift, both
firmware-controlled). The result can exceed RTK_PCI_RX_BUF_SIZE (11478),
causing an out-of-bounds read from the pre-allocated DMA buffer when
skb_put_data copies new_len bytes. The USB transport already validates
this (rtw_usb_rx_data_put checks against RTW_USB_MAX_RECVBUF_SZ); the
PCIe path does not.
Add a check that new_len does not exceed the DMA buffer size.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: e3037485c68ec1a299ff41160d8fedbd4abc29b9 Version: e3037485c68ec1a299ff41160d8fedbd4abc29b9 Version: e3037485c68ec1a299ff41160d8fedbd4abc29b9 Version: e3037485c68ec1a299ff41160d8fedbd4abc29b9 Version: e3037485c68ec1a299ff41160d8fedbd4abc29b9 Version: e3037485c68ec1a299ff41160d8fedbd4abc29b9 Version: e3037485c68ec1a299ff41160d8fedbd4abc29b9 Version: e3037485c68ec1a299ff41160d8fedbd4abc29b9 |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/wireless/realtek/rtw88/pci.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"status": "affected",
"version": "e3037485c68ec1a299ff41160d8fedbd4abc29b9",
"versionType": "git"
},
{
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"status": "affected",
"version": "e3037485c68ec1a299ff41160d8fedbd4abc29b9",
"versionType": "git"
},
{
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"status": "affected",
"version": "e3037485c68ec1a299ff41160d8fedbd4abc29b9",
"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
},
{
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},
{
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"status": "affected",
"version": "e3037485c68ec1a299ff41160d8fedbd4abc29b9",
"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/net/wireless/realtek/rtw88/pci.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.2"
},
{
"lessThan": "5.2",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.40",
"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": "5.10.261",
"versionStartIncluding": "5.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.212",
"versionStartIncluding": "5.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.178",
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"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.97",
"versionStartIncluding": "5.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.40",
"versionStartIncluding": "5.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.5",
"versionStartIncluding": "5.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "5.2",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw88: fix OOB read from firmware RX descriptor exceeding DMA buffer\n\nIn rtw_pci_rx_napi(), new_len is computed as the sum of pkt_len (14-bit\ndescriptor field, max 16383) and pkt_offset (drv_info_sz + shift, both\nfirmware-controlled). The result can exceed RTK_PCI_RX_BUF_SIZE (11478),\ncausing an out-of-bounds read from the pre-allocated DMA buffer when\nskb_put_data copies new_len bytes. The USB transport already validates\nthis (rtw_usb_rx_data_put checks against RTW_USB_MAX_RECVBUF_SZ); the\nPCIe path does not.\n\nAdd a check that new_len does not exceed the DMA buffer size."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 8.1,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:A - The bug is in rtw_pci_rx_napi() on the rtw88 PCIe WiFi RX path, reached when firmware DMAs received 802.11 frames and raises IMR_ROK; exploitation requires transmitting crafted or maximum-size WiFi frames within radio range, which is an adjacent wireless attack per kernel CVSS guidance.\nAC:L - An adjacent attacker can reliably trigger the bug by sending WiFi traffic that causes firmware to populate RX descriptors with pkt_len (up to 16383) plus pkt_offset (drv_info_sz+shift); sums above RTK_PCI_RX_BUF_SIZE (11478) are possible even with max VHT MPDUs (~11454 bytes), and the PCIe path lacked the USB driver\u0027s length validation.\nPR:N - No local account, capabilities, or namespace privileges on the victim are required; any unauthenticated attacker in WiFi range can cause the device to receive frames and invoke the driver RX interrupt/NAPI handler without victim credentials or association to the attacker\u0027s network.\nUI:N - Exploitation requires only that the rtw88 PCIe interface is active and receiving frames, which is the default on laptops, desktops, and many embedded systems with WiFi enabled; no additional victim actions such as opening files or mounting filesystems are needed.\nS:U - The vulnerability is confined to kernel memory accessed by the rtw88 host driver during RX processing on the same system; it does not cross a VM, container, or IOMMU security boundary to impact a separate security authority.\nC:H - skb_put_data() copies new_len bytes from a 11478-byte DMA RX skb without bounds checking, performing an out-of-bounds kernel heap read of up to thousands of bytes of adjacent slab memory that may contain pointers, keys, or other sensitive data subsequently embedded in the RX skb.\nI:N - The flaw is an out-of-bounds read via memcpy from the undersized RX buffer into a separately allocated skb; it does not directly overwrite kernel memory or provide an arbitrary write primitive, though leaked data could aid separate exploitation.\nA:H - Reading substantially beyond the mapped 11478-byte RX DMA buffer can access unmapped pages or slab redzones and provoke a kernel fault/oops during interrupt/NAPI processing, and repeated malicious frames can disrupt WiFi RX availability on affected rtw88 PCIe devices."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T05:46:53.802Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/913bd7d3d3d842b5c1d2b908a0201efa8fc79793"
},
{
"url": "https://git.kernel.org/stable/c/45abc14ab3f15da7d689f1a8809c1a01240a94d9"
},
{
"url": "https://git.kernel.org/stable/c/08193e733e5d4790e6c937af86d78793b02709be"
},
{
"url": "https://git.kernel.org/stable/c/6a3c384393d3f0b41669ed5a2e88744aad9d87c8"
},
{
"url": "https://git.kernel.org/stable/c/26c183a86ea4dd1f2ff90c6f783649e7f5722a10"
},
{
"url": "https://git.kernel.org/stable/c/01155ded5d4dad61840a9a3c33ab56778ef1f100"
},
{
"url": "https://git.kernel.org/stable/c/1554fa522f16ec7c5c342ad33fe734eeb6eb2452"
},
{
"url": "https://git.kernel.org/stable/c/6e76e9ed273dfb4b3333a5ebbb94958cc5752ab6"
}
],
"title": "wifi: rtw88: fix OOB read from firmware RX descriptor exceeding DMA buffer",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-74410",
"datePublished": "2026-08-15T05:59:18.039Z",
"dateReserved": "2026-08-15T05:44:03.892Z",
"dateUpdated": "2026-08-17T05:46:53.802Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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