FKIE_CVE-2024-40948

Vulnerability from fkie_nvd - Published: 2024-07-12 13:15 - Updated: 2025-11-03 22:17
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/page_table_check: fix crash on ZONE_DEVICE Not all pages may apply to pgtable check. One example is ZONE_DEVICE pages: they map PFNs directly, and they don't allocate page_ext at all even if there's struct page around. One may reference devm_memremap_pages(). When both ZONE_DEVICE and page-table-check enabled, then try to map some dax memories, one can trigger kernel bug constantly now when the kernel was trying to inject some pfn maps on the dax device: kernel BUG at mm/page_table_check.c:55! While it's pretty legal to use set_pxx_at() for ZONE_DEVICE pages for page fault resolutions, skip all the checks if page_ext doesn't even exist in pgtable checker, which applies to ZONE_DEVICE but maybe more.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/51897f99351fff7b57f4f141940fa93b4e90fd2bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/84d3549d54f5ff9fa3281257be3019386f51d1a0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8bb592c2eca8fd2bc06db7d80b38da18da4a2f43Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dec2382247860d2134c8d41e103e26460c099629Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/51897f99351fff7b57f4f141940fa93b4e90fd2bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/84d3549d54f5ff9fa3281257be3019386f51d1a0Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8bb592c2eca8fd2bc06db7d80b38da18da4a2f43Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/dec2382247860d2134c8d41e103e26460c099629Patch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.10
linux linux_kernel 6.10
linux linux_kernel 6.10
linux linux_kernel 6.10
To clipboard 

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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/page_table_check: fix crash on ZONE_DEVICE\n\nNot all pages may apply to pgtable check.  One example is ZONE_DEVICE\npages: they map PFNs directly, and they don\u0027t allocate page_ext at all\neven if there\u0027s struct page around.  One may reference\ndevm_memremap_pages().\n\nWhen both ZONE_DEVICE and page-table-check enabled, then try to map some\ndax memories, one can trigger kernel bug constantly now when the kernel\nwas trying to inject some pfn maps on the dax device:\n\n kernel BUG at mm/page_table_check.c:55!\n\nWhile it\u0027s pretty legal to use set_pxx_at() for ZONE_DEVICE pages for page\nfault resolutions, skip all the checks if page_ext doesn\u0027t even exist in\npgtable checker, which applies to ZONE_DEVICE but maybe more."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm/page_table_check: corrige el fallo en ZONE_DEVICE Es posible que no todas las p\u00e1ginas se apliquen a la verificaci\u00f3n de pgtable. Un ejemplo son las p\u00e1ginas ZONE_DEVICE: asignan PFN directamente y no asignan page_ext en absoluto, incluso si hay una p\u00e1gina de estructura alrededor. Se puede hacer referencia a devm_memremap_pages(). Cuando tanto ZONE_DEVICE como page-table-check est\u00e1n habilitados, intente asignar algunas memorias dax, uno puede desencadenar un error del kernel constantemente ahora cuando el kernel intenta inyectar algunos mapas pfn en el dispositivo dax: ERROR del kernel en mm/page_table_check.c: 55! Si bien es bastante legal usar set_pxx_at() para p\u00e1ginas ZONE_DEVICE para resoluci\u00f3n de fallas de p\u00e1gina, omita todas las comprobaciones si page_ext ni siquiera existe en pgtable checker, lo que se aplica a ZONE_DEVICE pero tal vez m\u00e1s."
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  "id": "CVE-2024-40948",
  "lastModified": "2025-11-03T22:17:16.877",
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          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "impactScore": 3.6,
        "source": "nvd@nist.gov",
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  "published": "2024-07-12T13:15:17.187",
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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Detection rules are retrieved from Rulezet.