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

Vulnerability from cvelistv5 – Published: 2025-12-08 00:46 – Updated: 2026-05-11 21:46
VLAI
Title
accel/habanalabs: support mapping cb with vmalloc-backed coherent memory
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
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7063 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399 , < 7ec8ac9f73d4a9438c2186768d6de27ace37531e (git)
Affected: ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399 , < d1dfe21a332d38a6a09658ec29a55940afb5fe36 (git)
Affected: ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399 , < 73c7c2cdb442fc4160d2a2a4bfffbd162af06cb9 (git)
Affected: ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399 , < 513024d5a0e34fd34247043f1876b6138ca52847 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.8
Unaffected: 0 , < 5.8 (semver)
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)
guessed Create a notification for this product.
Show details on NVD website
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/accel/habanalabs/gaudi/gaudi.c",
            "drivers/accel/habanalabs/gaudi2/gaudi2.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399",
              "versionType": "git"
            },
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              "status": "affected",
              "version": "ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399",
              "versionType": "git"
            },
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            }
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        },
        {
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          "product": "Linux",
          "programFiles": [
            "drivers/accel/habanalabs/gaudi/gaudi.c",
            "drivers/accel/habanalabs/gaudi2/gaudi2.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "lessThanOrEqual": "6.6.*",
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              "versionType": "semver"
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            {
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              "status": "unaffected",
              "version": "6.12.58",
              "versionType": "semver"
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            {
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              "status": "unaffected",
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              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "5.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.58",
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                },
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                  "versionStartIncluding": "5.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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": "2026-05-11T21:46:54.066Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7ec8ac9f73d4a9438c2186768d6de27ace37531e"
        },
        {
          "url": "https://git.kernel.org/stable/c/d1dfe21a332d38a6a09658ec29a55940afb5fe36"
        },
        {
          "url": "https://git.kernel.org/stable/c/73c7c2cdb442fc4160d2a2a4bfffbd162af06cb9"
        },
        {
          "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": "2026-05-11T21:46:54.066Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-40311",
      "date": "2026-10-27",
      "epss": "0.00186",
      "percentile": "0.08096"
    },
    "microsoft_vex": {
      "current_release_date": "2025-12-16T14:39:36.000Z",
      "cve": "CVE-2025-40311",
      "id": "msrc_CVE-2025-40311",
      "initial_release_date": "2025-12-02T00:00:00.000Z",
      "product_status:fixed": "1",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "accel/habanalabs: support mapping cb with vmalloc-backed coherent memory",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-40311.json",
      "version": "2"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/accel/habanalabs/gaudi/gaudi.c",
                  "drivers/accel/habanalabs/gaudi2/gaudi2.c"
                ],
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                "versions": [
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                    "version": "6.12.58",
                    "versionType": "semver"
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        ],
        "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."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\naccel/habanalabs: soporte para mapear cb con memoria coherente respaldada por vmalloc\n\nCuando IOMMU est\u00e1 habilitado, dma_alloc_coherent() con GFP_USER puede devolver direcciones del rango de vmalloc. Si dicha direcci\u00f3n se mapea sin VM_MIXEDMAP, vm_insert_page() activar\u00e1 un BUG_ON debido a la restricci\u00f3n de VM_PFNMAP.\n\nSolucione esto verificando las direcciones de vmalloc y configurando VM_MIXEDMAP en el VMA antes del mapeo. Esto asegura un mapeo seguro y evita fallos del kernel. La memoria sigue siendo asignada por el controlador y no puede ser accedida directamente por el espacio de usuario."
          }
        ],
        "id": "CVE-2025-40311",
        "lastModified": "2026-10-14T22:10:00.210",
        "metrics": {},
        "published": "2025-12-08T01:16:03.477",
        "references": [
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:34:33+00:00",
      "cve": "CVE-2025-40311",
      "id": "CVE-2025-40311",
      "initial_release_date": "2025-12-08T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: accel/habanalabs: support mapping cb with vmalloc-backed coherent memory",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40311.json",
      "version": "3"
    }
  }
}



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