GHSA-Q638-PMRF-WWCC
Vulnerability from github – Published: 2025-11-12 12:30 – Updated: 2026-07-30 06:32In 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.
{
"affected": [],
"aliases": [
"CVE-2025-40172"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-11-12T11:15:47Z",
"severity": "HIGH"
},
"details": "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-\u003exferred_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.",
"id": "GHSA-q638-pmrf-wwcc",
"modified": "2026-07-30T06:32:17Z",
"published": "2025-11-12T12:30:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40172"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/11f08c30a3e4157305ba692f1d44cca5fc9a8fca"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1ab9733d14cc9987cc5dcd1f0ad1f416e302e2e6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/48b1d42286bfef7628b1d6c8c28d4e456c90f725"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/551f1dfbcb7f3e6ed07f9d6c8c1c64337fcd0ede"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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