CVE-2025-40311 (GCVE-0-2025-40311)

Vulnerability from cvelistv5 – Published: 2025-12-08 00:46 – Updated: 2025-12-08 00:46
VLAI?
Summary
In the Linux kernel, the following vulnerability has been resolved: accel/habanalabs: support mapping cb with vmalloc-backed coherent memory When IOMMU is enabled, dma_alloc_coherent() with GFP_USER may return addresses from the vmalloc range. If such an address is mapped without VM_MIXEDMAP, vm_insert_page() will trigger a BUG_ON due to the VM_PFNMAP restriction. Fix this by checking for vmalloc addresses and setting VM_MIXEDMAP in the VMA before mapping. This ensures safe mapping and avoids kernel crashes. The memory is still driver-allocated and cannot be accessed directly by userspace.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7ec8ac9f73d4a9438c2186768d6de27ace37531e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d1dfe21a332d38a6a09658ec29a55940afb5fe36 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 73c7c2cdb442fc4160d2a2a4bfffbd162af06cb9 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 513024d5a0e34fd34247043f1876b6138ca52847 (git)
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    Linux Linux Unaffected: 6.6.117 , ≤ 6.6.* (semver)
Unaffected: 6.12.58 , ≤ 6.12.* (semver)
Unaffected: 6.17.8 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
            "drivers/accel/habanalabs/gaudi/gaudi.c",
            "drivers/accel/habanalabs/gaudi2/gaudi2.c"
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          "versions": [
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          "product": "Linux",
          "programFiles": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              ],
              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/habanalabs: support mapping cb with vmalloc-backed coherent memory\n\nWhen IOMMU is enabled, dma_alloc_coherent() with GFP_USER may return\naddresses from the vmalloc range. If such an address is mapped without\nVM_MIXEDMAP, vm_insert_page() will trigger a BUG_ON due to the\nVM_PFNMAP restriction.\n\nFix this by checking for vmalloc addresses and setting VM_MIXEDMAP\nin the VMA before mapping. This ensures safe mapping and avoids kernel\ncrashes. The memory is still driver-allocated and cannot be accessed\ndirectly by userspace."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-08T00:46:36.903Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/7ec8ac9f73d4a9438c2186768d6de27ace37531e"
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        },
        {
          "url": "https://git.kernel.org/stable/c/513024d5a0e34fd34247043f1876b6138ca52847"
        }
      ],
      "title": "accel/habanalabs: support mapping cb with vmalloc-backed coherent memory",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40311",
    "datePublished": "2025-12-08T00:46:36.903Z",
    "dateReserved": "2025-04-16T07:20:57.185Z",
    "dateUpdated": "2025-12-08T00:46:36.903Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-40311\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-08T01:16:03.477\",\"lastModified\":\"2025-12-08T18:26:19.900\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\naccel/habanalabs: support mapping cb with vmalloc-backed coherent memory\\n\\nWhen IOMMU is enabled, dma_alloc_coherent() with GFP_USER may return\\naddresses from the vmalloc range. If such an address is mapped without\\nVM_MIXEDMAP, vm_insert_page() will trigger a BUG_ON due to the\\nVM_PFNMAP restriction.\\n\\nFix this by checking for vmalloc addresses and setting VM_MIXEDMAP\\nin the VMA before mapping. This ensures safe mapping and avoids kernel\\ncrashes. The memory is still driver-allocated and cannot be accessed\\ndirectly by userspace.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/513024d5a0e34fd34247043f1876b6138ca52847\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/73c7c2cdb442fc4160d2a2a4bfffbd162af06cb9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7ec8ac9f73d4a9438c2186768d6de27ace37531e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d1dfe21a332d38a6a09658ec29a55940afb5fe36\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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