mirror of
https://github.com/fkie-cad/nvd-json-data-feeds.git
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45 lines
2.3 KiB
JSON
45 lines
2.3 KiB
JSON
{
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"id": "CVE-2021-47649",
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"published": "2025-02-26T06:37:06.687",
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"lastModified": "2025-02-26T06:37:06.687",
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"vulnStatus": "Awaiting Analysis",
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"cveTags": [],
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nudmabuf: validate ubuf->pagecount\n\nSyzbot has reported GPF in sg_alloc_append_table_from_pages(). The\nproblem was in ubuf->pages == ZERO_PTR.\n\nubuf->pagecount is calculated from arguments passed from user-space. If\nuser creates udmabuf with list.size == 0 then ubuf->pagecount will be\nalso equal to zero; it causes kmalloc_array() to return ZERO_PTR.\n\nFix it by validating ubuf->pagecount before passing it to\nkmalloc_array()."
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},
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{
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"lang": "es",
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: udmabuf: validar ubuf->pagecount Syzbot ha informado de un GPF en sg_alloc_append_table_from_pages(). El problema estaba en ubuf->pages == ZERO_PTR. ubuf->pagecount se calcula a partir de los argumentos pasados desde el espacio de usuario. Si el usuario crea udmabuf con list.size == 0, entonces ubuf->pagecount tambi\u00e9n ser\u00e1 igual a cero; esto hace que kmalloc_array() devuelva ZERO_PTR. Arr\u00e9glelo validando ubuf->pagecount antes de pasarlo a kmalloc_array()."
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}
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],
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"metrics": {},
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/2b6dd600dd72573c23ea180b5b0b2f1813405882",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/5d50f851dd307c07ca5591297093f19967c834a9",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/811b667cefbea9cb7511a874b169d6a92907137e",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/9e9b4a269f84d3230f2af84ff42322db676440d9",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/a3728d32fc61eb0fe283cb8ff60b2c8f751e2202",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/b267a8118c2b171bf7d67b90ed64154eeab9fae0",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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}
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]
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} |