CVE-2025-40172
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: accel/qaic: Treat remaining == 0 as error in find_and_map_user_pages() Currently, if find_and_map_user_pages() takes a DMA xfer request from the user with a length field set to 0, or in a rare case, the host receives QAIC_TRANS_DMA_XFER_CONT from the device where resources->xferred_dma_size is equal to the requested transaction size, the function will return 0 before allocating an sgt or setting the fields of the dma_xfer struct. In that case, encode_addr_size_pairs() will try to access the sgt which will lead to a general protection fault. Return an EINVAL in case the user provides a zero-sized ALP, or the device requests continuation after all of the bytes have been transferred.
Severity
HIGH
CVSS score
7.8
(v3.1)
Vulnerability status
Deferred
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-11-12 11:15:47.643000
Last modified
2026-10-19 21:10:00.160000
View original CVE JSON
{
"id": "CVE-2025-40172",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-11-12T11:15:47.643",
"lastModified": "2026-10-19T21:10:00.160",
"vulnStatus": "Deferred",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/qaic: Treat remaining == 0 as error in find_and_map_user_pages()\n\nCurrently, if find_and_map_user_pages() takes a DMA xfer request from the\nuser with a length field set to 0, or in a rare case, the host receives\nQAIC_TRANS_DMA_XFER_CONT from the device where resources->xferred_dma_size\nis equal to the requested transaction size, the function will return 0\nbefore allocating an sgt or setting the fields of the dma_xfer struct.\nIn that case, encode_addr_size_pairs() will try to access the sgt which\nwill lead to a general protection fault.\n\nReturn an EINVAL in case the user provides a zero-sized ALP, or the device\nrequests continuation after all of the bytes have been transferred."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\naccel/qaic: Tratar “remaining == 0” como error en “find_and_map_user_pages()”\n\nActualmente, si “find_and_map_user_pages()” recibe una solicitud de transferencia DMA del usuario con un campo de longitud establecido en 0, o en un caso raro, el host recibe “QAIC_TRANS_DMA_XFER_CONT” del dispositivo donde “resources->xferred_dma_size” es igual al tamaño de transacción solicitado, la función devolverá 0 antes de asignar un “sgt” o establecer los campos de la estructura “dma_xfer”. En ese caso, “encode_addr_size_pairs()” intentará acceder al “sgt”, lo que provocará un fallo de protección general.\n\nDevolver un “EINVAL” en caso de que el usuario proporcione un ALP de tamaño cero, o el dispositivo solicite una continuación después de que todos los bytes hayan sido transferidos."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/accel/qaic/qaic_control.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "96d3c1cadedb6ae2e8965e19cd12caa244afbd9c",
"lessThan": "48b1d42286bfef7628b1d6c8c28d4e456c90f725",
"versionType": "git",
"status": "affected"
},
{
"version": "96d3c1cadedb6ae2e8965e19cd12caa244afbd9c",
"lessThan": "551f1dfbcb7f3e6ed07f9d6c8c1c64337fcd0ede",
"versionType": "git",
"status": "affected"
},
{
"version": "96d3c1cadedb6ae2e8965e19cd12caa244afbd9c",
"lessThan": "1ab9733d14cc9987cc5dcd1f0ad1f416e302e2e6",
"versionType": "git",
"status": "affected"
},
{
"version": "96d3c1cadedb6ae2e8965e19cd12caa244afbd9c",
"lessThan": "11f08c30a3e4157305ba692f1d44cca5fc9a8fca",
"versionType": "git",
"status": "affected"
},
{
"version": "d410a96e5cb8c1ec7049c83f2edcd8bbfaf5d9b3",
"versionType": "git",
"status": "affected"
},
{
"version": "6.4.12",
"lessThan": "6.5",
"versionType": "semver",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/accel/qaic/qaic_control.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "6.5",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.5",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.114",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.55",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.17.5",
"lessThanOrEqual": "6.17.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9
}
]
},
"references": [
{
"url": "https://git.kernel.org/stable/c/11f08c30a3e4157305ba692f1d44cca5fc9a8fca",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/1ab9733d14cc9987cc5dcd1f0ad1f416e302e2e6",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/48b1d42286bfef7628b1d6c8c28d4e456c90f725",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/551f1dfbcb7f3e6ed07f9d6c8c1c64337fcd0ede",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}