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vuln-cve/data/2026/80xxx/CVE-2026-80973.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-80973",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-08-26T14:34:25.810Z",
"datePublished": "2026-09-11T19:42:35.751Z",
"dateUpdated": "2026-10-19T08:45:57.889Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-10-19T08:45:57.889Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: 6fire: bound the MIDI event length from the device\n\nusb6fire_comm_receiver_handler() forwards a MIDI event using a length\nbyte the device supplies, with no bound and no check that the transfer\ndelivered that many bytes:\n\n\tif (!urb->status) {\n\t\tif (rt->receiver_buffer[0] == 0x10) /* midi in event */\n\t\t\tif (midi_rt)\n\t\t\t\tmidi_rt->in_received(midi_rt,\n\t\t\t\t\t\trt->receiver_buffer + 2,\n\t\t\t\t\t\trt->receiver_buffer[1]);\n\t}\n\nreceiver_buffer is a 64-byte kzalloc() buffer (COMM_RECEIVER_BUFSIZE), so\nonly 62 bytes follow the two-byte header. receiver_buffer[1] is a u8 the\ndevice chooses, so a device that answers with 0x10 and a length of 0xFF\nmakes snd_rawmidi_receive() read 255 bytes starting two bytes into a\n64-byte object. The bytes past the buffer are handed to userspace\nthrough the rawmidi read path.\n\nurb->actual_length is not consulted either, so a short transfer leaves\nboth the type byte and the length byte at their previous values and the\nhandler acts on stale data.\n\nThe receiver URB is submitted from usb6fire_comm_init() at probe, so the\nread happens on plug with no user action; forwarding to userspace also\nneeds a MIDI input substream open, since usb6fire_midi_in_received()\nonly calls snd_rawmidi_receive() when rt->in is set.\n\nKASAN on 7.2.0-rc5 (arm64), single packet from an emulated device:\n\n BUG: KASAN: slab-out-of-bounds in snd_rawmidi_receive\n Read of size 255 at addr ffff000009f64682 by task bash/183\n __asan_memcpy\n snd_rawmidi_receive\n usb6fire_midi_in_received [snd_usb_6fire]\n usb6fire_comm_receiver_handler [snd_usb_6fire]\n Allocated by task 11:\n usb6fire_comm_init [snd_usb_6fire]\n usb6fire_chip_probe [snd_usb_6fire]\n The buggy address is located 2 bytes inside of\n allocated 64-byte region [ffff000009f64680, ffff000009f646c0)\n\nReject the event when the length exceeds the bytes that follow the\nheader, and require the transfer to have delivered the header plus that\nmany bytes. The receiver URB is submitted with a 64-byte\ntransfer_buffer_length, so a genuine device cannot deliver an event\nlonger than those 62 bytes and nothing valid is dropped.\n\nDiscovered by XBOW, triaged by Baul Lee <baul.lee@xbow.com>"
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"sound/usb/6fire/comm.c"
],
"versions": [
{
"version": "c6d43ba816d1cf1d125bfbfc938f2a28a87facf9",
"lessThan": "c9204bc2ed2010e2469dbe5fce598878a37efd04",
"status": "affected",
"versionType": "git"
},
{
"version": "c6d43ba816d1cf1d125bfbfc938f2a28a87facf9",
"lessThan": "2c590d5e1b1595d5c8fa0b72d2897423ce9985ca",
"status": "affected",
"versionType": "git"
},
{
"version": "c6d43ba816d1cf1d125bfbfc938f2a28a87facf9",
"lessThan": "0c8a3c773823cf12abd39c480aed70e25c384630",
"status": "affected",
"versionType": "git"
},
{
"version": "c6d43ba816d1cf1d125bfbfc938f2a28a87facf9",
"lessThan": "00e84a9ff2d43953ae261995cae94d46f4c307a6",
"status": "affected",
"versionType": "git"
},
{
"version": "c6d43ba816d1cf1d125bfbfc938f2a28a87facf9",
"lessThan": "466e911bbbbb779bb06337e35a286e5ca7af16b3",
"status": "affected",
"versionType": "git"
},
{
"version": "c6d43ba816d1cf1d125bfbfc938f2a28a87facf9",
"lessThan": "2a6f6fba3bd31d2e8c957fefa29156e35e5e75d5",
"status": "affected",
"versionType": "git"
},
{
"version": "c6d43ba816d1cf1d125bfbfc938f2a28a87facf9",
"lessThan": "34816e2cfeabafb8eccf54687186ce25699e8363",
"status": "affected",
"versionType": "git"
},
{
"version": "c6d43ba816d1cf1d125bfbfc938f2a28a87facf9",
"lessThan": "a478893b59e36cfe7d77a76b352f2db55502e879",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"sound/usb/6fire/comm.c"
],
"versions": [
{
"version": "2.6.39",
"status": "affected"
},
{
"version": "0",
"lessThan": "2.6.39",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.270",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.221",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.188",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.157",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.109",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.50",
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.2.4",
"lessThanOrEqual": "7.2.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.3",
"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": "2.6.39",
"versionEndExcluding": "5.10.270"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.39",
"versionEndExcluding": "5.15.221"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.39",
"versionEndExcluding": "6.1.188"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.39",
"versionEndExcluding": "6.6.157"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.39",
"versionEndExcluding": "6.12.109"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.39",
"versionEndExcluding": "6.18.50"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.39",
"versionEndExcluding": "7.2.4"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.39",
"versionEndExcluding": "7.3"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/c9204bc2ed2010e2469dbe5fce598878a37efd04"
},
{
"url": "https://git.kernel.org/stable/c/2c590d5e1b1595d5c8fa0b72d2897423ce9985ca"
},
{
"url": "https://git.kernel.org/stable/c/0c8a3c773823cf12abd39c480aed70e25c384630"
},
{
"url": "https://git.kernel.org/stable/c/00e84a9ff2d43953ae261995cae94d46f4c307a6"
},
{
"url": "https://git.kernel.org/stable/c/466e911bbbbb779bb06337e35a286e5ca7af16b3"
},
{
"url": "https://git.kernel.org/stable/c/2a6f6fba3bd31d2e8c957fefa29156e35e5e75d5"
},
{
"url": "https://git.kernel.org/stable/c/34816e2cfeabafb8eccf54687186ce25699e8363"
},
{
"url": "https://git.kernel.org/stable/c/a478893b59e36cfe7d77a76b352f2db55502e879"
}
],
"title": "ALSA: 6fire: bound the MIDI event length from the device",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}
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