CVE-2026-64407 (GCVE-0-2026-64407)
Vulnerability from cvelistv5
Published
2026-07-25 08:50
Modified
2026-08-17 04:55
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: btnxpuart: Fix out-of-bounds firmware read in nxp_recv_fw_req_v3()
During the v3 firmware download the controller sends a v3_data_req with a
32 bit offset and a 16 bit len. nxp_recv_fw_req_v3() checks only the lower
bound of the offset and then sends firmware from that offset.
nxpdev->fw_dnld_v3_offset = offset - nxpdev->fw_v3_offset_correction;
serdev_device_write_buf(nxpdev->serdev, nxpdev->fw->data +
nxpdev->fw_dnld_v3_offset, len);
Nothing checks that fw_dnld_v3_offset + len stays within nxpdev->fw->size,
so a controller that asks for an offset or length past the firmware image
makes the driver read past the end of nxpdev->fw->data and send that
memory back over UART.
nxp_recv_fw_req_v1() already bounds the same write. Add the equivalent
check to the v3 path, reject the request when it falls outside the firmware
image, and zero len on the error path so the fw_v3_prev_sent bookkeeping at
free_skb stays consistent.
References
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/bluetooth/btnxpuart.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "21e60eb4d95854196e7c0e77383f35e7ac95df61",
"status": "affected",
"version": "689ca16e523278470c38832a3010645a78c544d8",
"versionType": "git"
},
{
"lessThan": "441088792ffec3ca01f4efe2934060570eb11eb8",
"status": "affected",
"version": "689ca16e523278470c38832a3010645a78c544d8",
"versionType": "git"
},
{
"lessThan": "2a68a773089204af1c8581dc79668b775418c5ee",
"status": "affected",
"version": "689ca16e523278470c38832a3010645a78c544d8",
"versionType": "git"
},
{
"lessThan": "49bcb39e3a041ce26021f77971eaccb49a275118",
"status": "affected",
"version": "689ca16e523278470c38832a3010645a78c544d8",
"versionType": "git"
},
{
"lessThan": "badff6c3bed8923a1257a853f137d447976eec30",
"status": "affected",
"version": "689ca16e523278470c38832a3010645a78c544d8",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/bluetooth/btnxpuart.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.4"
},
{
"lessThan": "6.4",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.96",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.39",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.4",
"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": "6.6.145",
"versionStartIncluding": "6.4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.96",
"versionStartIncluding": "6.4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.39",
"versionStartIncluding": "6.4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.4",
"versionStartIncluding": "6.4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "6.4",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btnxpuart: Fix out-of-bounds firmware read in nxp_recv_fw_req_v3()\n\nDuring the v3 firmware download the controller sends a v3_data_req with a\n32 bit offset and a 16 bit len. nxp_recv_fw_req_v3() checks only the lower\nbound of the offset and then sends firmware from that offset.\n\n nxpdev-\u003efw_dnld_v3_offset = offset - nxpdev-\u003efw_v3_offset_correction;\n serdev_device_write_buf(nxpdev-\u003eserdev, nxpdev-\u003efw-\u003edata +\n nxpdev-\u003efw_dnld_v3_offset, len);\n\nNothing checks that fw_dnld_v3_offset + len stays within nxpdev-\u003efw-\u003esize,\nso a controller that asks for an offset or length past the firmware image\nmakes the driver read past the end of nxpdev-\u003efw-\u003edata and send that\nmemory back over UART.\n\nnxp_recv_fw_req_v1() already bounds the same write. Add the equivalent\ncheck to the v3 path, reject the request when it falls outside the firmware\nimage, and zero len on the error path so the fw_v3_prev_sent bookkeeping at\nfree_skb stays consistent."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T04:55:05.687Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/21e60eb4d95854196e7c0e77383f35e7ac95df61"
},
{
"url": "https://git.kernel.org/stable/c/441088792ffec3ca01f4efe2934060570eb11eb8"
},
{
"url": "https://git.kernel.org/stable/c/2a68a773089204af1c8581dc79668b775418c5ee"
},
{
"url": "https://git.kernel.org/stable/c/49bcb39e3a041ce26021f77971eaccb49a275118"
},
{
"url": "https://git.kernel.org/stable/c/badff6c3bed8923a1257a853f137d447976eec30"
}
],
"title": "Bluetooth: btnxpuart: Fix out-of-bounds firmware read in nxp_recv_fw_req_v3()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-64407",
"datePublished": "2026-07-25T08:50:48.912Z",
"dateReserved": "2026-07-19T15:36:31.786Z",
"dateUpdated": "2026-08-17T04:55:05.687Z",
"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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