CVE-2026-74681
In the Linux kernel, the following vulnerability has been resolved:
usb: misc: usbio: check ibuf_len against rxbuf_len in bulk msg
ibuf_len is the bulk IN (receive) buffer size, but the EMSGSIZE check in usbio_bulk_msg() compares it against txbuf_len — the bulk OUT endpoint size. Both are taken independently from different endpoints in usbio_probe(), so the check is wrong when they differ.
Use rxbuf_len for the IN direction. This matches the buffer that actually holds the response data.
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.21%
- Percentil entre todas las CVEs puntuadas: 10
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-74681",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "121a0f839dbb397af5fabb701cea3e9983223e50",
"lessThan": "ebfd1e82ab0a6d26efd9bdd89de899215851f5bf",
"versionType": "git"
},
{
"status": "affected",
"version": "121a0f839dbb397af5fabb701cea3e9983223e50",
"lessThan": "9ad0164f78b66b0b5eca3a5748cc94dd87e28124",
"versionType": "git"
},
{
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"lessThan": "7e22c9f79b200672f3e477421b6c9050d8cf70a5",
"versionType": "git"
}
],
"programFiles": [
"drivers/usb/misc/usbio.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.18"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.18",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.45",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.9",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/usb/misc/usbio.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-08-22T16:16:42.373",
"references": [
{
"url": "https://git.kernel.org/stable/c/7e22c9f79b200672f3e477421b6c9050d8cf70a5",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9ad0164f78b66b0b5eca3a5748cc94dd87e28124",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ebfd1e82ab0a6d26efd9bdd89de899215851f5bf",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: misc: usbio: check ibuf_len against rxbuf_len in bulk msg\n\nibuf_len is the bulk IN (receive) buffer size, but the EMSGSIZE check\nin usbio_bulk_msg() compares it against txbuf_len — the bulk OUT\nendpoint size. Both are taken independently from different endpoints\nin usbio_probe(), so the check is wrong when they differ.\n\nUse rxbuf_len for the IN direction. This matches the buffer that\nactually holds the response data."
}
],
"lastModified": "2026-08-22T16:16:42.373",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}