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

Vulnerability from cvelistv5 – Published: 2025-12-08 00:46 – Updated: 2026-10-30 12:22
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 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399 , < 8de421db5b1b2b37e9643ea7f6ade90fd756892d (git)
Affected: ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399 , < 7ec8ac9f73d4a9438c2186768d6de27ace37531e (git)
Affected: ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399 , < d1dfe21a332d38a6a09658ec29a55940afb5fe36 (git)
Affected: ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399 , < 73c7c2cdb442fc4160d2a2a4bfffbd162af06cb9 (git)
Affected: ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399 , < 513024d5a0e34fd34247043f1876b6138ca52847 (git)
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Linux Linux Affected: 5.8
Unaffected: 0 , < 5.8 (semver)
Unaffected: 6.1.191 , ≤ 6.1.* (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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{
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          "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."
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    "datePublished": "2025-12-08T00:46:36.903Z",
    "dateReserved": "2025-04-16T07:20:57.185Z",
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    "state": "PUBLISHED"
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            "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."
          },
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            "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": "2026-10-30T13:18:15.057",
        "metrics": {},
        "published": "2025-12-08T01:16:03.477",
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      "title": "kernel: accel/habanalabs: support mapping cb with vmalloc-backed coherent memory",
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}



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