CVE-2026-74679
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_ncm: Use unsigned int for ndp_index The variable ndp_index is declared as a signed integer, but it stores the return value of get_ncm(), which is unsigned. A malicious host can supply a large offset that overflows the signed ndp_index, making it negative. Because ndp_index is compared against unsigned bounds, this negative value bypasses sanity checks and leads to an out-of-bounds read when calculating the address of the NDP block (ntb_ptr + ndp_index). Fix this by changing ndp_index to unsigned int to ensure consistent unsigned comparisons throughout the function.
Severity
Not scored
CVSS score
Not available
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-08-22 16:16:42.090000
Last modified
2026-11-06 17:19:54.157000
View original CVE JSON
{
"id": "CVE-2026-74679",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-08-22T16:16:42.090",
"lastModified": "2026-11-06T17:19:54.157",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_ncm: Use unsigned int for ndp_index\n\nThe variable ndp_index is declared as a signed integer, but it stores\nthe return value of get_ncm(), which is unsigned.\n\nA malicious host can supply a large offset that overflows the signed\nndp_index, making it negative. Because ndp_index is compared against\nunsigned bounds, this negative value bypasses sanity checks and leads\nto an out-of-bounds read when calculating the address of the NDP\nblock (ntb_ptr + ndp_index).\n\nFix this by changing ndp_index to unsigned int to ensure consistent\nunsigned comparisons throughout the function."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nusb: gadget: f_ncm: Usar unsigned int para ndp_index\n\nLa variable ndp_index está declarada como un entero con signo, pero almacena el valor de retorno de get_ncm(), que es sin signo.\n\nUn host malicioso puede proporcionar un gran desplazamiento que desborda el ndp_index con signo, haciéndolo negativo. Debido a que ndp_index se compara con límites sin signo, este valor negativo elude las comprobaciones de cordura y conduce a una lectura fuera de límites al calcular la dirección del bloque NDP (ntb_ptr + ndp_index).\n\nSolucione esto cambiando ndp_index a unsigned int para asegurar comparaciones sin signo consistentes a lo largo de la función."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/usb/gadget/function/f_ncm.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "370af734dfaf8336b496b386e194648e097e248a",
"lessThan": "9c8c6825a750fcd3efbe922847ca70ccd5a66857",
"versionType": "git",
"status": "affected"
},
{
"version": "370af734dfaf8336b496b386e194648e097e248a",
"lessThan": "a1c0deeba4a46481543d6b09c665f758c54c3a1a",
"versionType": "git",
"status": "affected"
},
{
"version": "370af734dfaf8336b496b386e194648e097e248a",
"lessThan": "d13f650a3485b58c124b3cda45597e8002c9c833",
"versionType": "git",
"status": "affected"
},
{
"version": "370af734dfaf8336b496b386e194648e097e248a",
"lessThan": "11413d7ed42174b8f5d8d0b6a25d10dc88239b21",
"versionType": "git",
"status": "affected"
},
{
"version": "370af734dfaf8336b496b386e194648e097e248a",
"lessThan": "5b2b3a3229a3f4c493ffdee53aee2f173b6f13b3",
"versionType": "git",
"status": "affected"
},
{
"version": "370af734dfaf8336b496b386e194648e097e248a",
"lessThan": "d328fdc607fa1bb668ad512e1c918a120f78f337",
"versionType": "git",
"status": "affected"
},
{
"version": "370af734dfaf8336b496b386e194648e097e248a",
"lessThan": "fc9e54e22845c4da29588ca0986cb7c795b5a262",
"versionType": "git",
"status": "affected"
},
{
"version": "370af734dfaf8336b496b386e194648e097e248a",
"lessThan": "6b1c8a9403a26cb0fed7a648916c74dc236da591",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/usb/gadget/function/f_ncm.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "3.17",
"status": "affected"
},
{
"version": "0",
"lessThan": "3.17",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.10.265",
"lessThanOrEqual": "5.10.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.15.216",
"lessThanOrEqual": "5.15.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.183",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.152",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.104",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.45",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.1.9",
"lessThanOrEqual": "7.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-11-06T17:01:05.746125Z",
"id": "CVE-2026-74679",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"references": [
{
"url": "https://git.kernel.org/stable/c/11413d7ed42174b8f5d8d0b6a25d10dc88239b21",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/5b2b3a3229a3f4c493ffdee53aee2f173b6f13b3",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/6b1c8a9403a26cb0fed7a648916c74dc236da591",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9c8c6825a750fcd3efbe922847ca70ccd5a66857",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a1c0deeba4a46481543d6b09c665f758c54c3a1a",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d13f650a3485b58c124b3cda45597e8002c9c833",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d328fdc607fa1bb668ad512e1c918a120f78f337",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/fc9e54e22845c4da29588ca0986cb7c795b5a262",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}