github - ghsa-g3pf-jp95-cjc3

GHSA-G3PF-JP95-CJC3

Vulnerability from github – Published: 2025-12-08 03:31 – Updated: 2025-12-08 03:31

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-40311"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-08T01:16:03Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-g3pf-jp95-cjc3",
  "modified": "2025-12-08T03:31:01Z",
  "published": "2025-12-08T03:31:01Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40311"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/513024d5a0e34fd34247043f1876b6138ca52847"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/73c7c2cdb442fc4160d2a2a4bfffbd162af06cb9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7ec8ac9f73d4a9438c2186768d6de27ace37531e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d1dfe21a332d38a6a09658ec29a55940afb5fe36"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2025-12-08 00:46 – Updated: 2025-12-08 00:46

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

References

URL

Tags

	https://git.kernel.org/stable/c/7ec8ac9f73d4a9438…
	https://git.kernel.org/stable/c/d1dfe21a332d38a6a…
	https://git.kernel.org/stable/c/73c7c2cdb442fc416…
	https://git.kernel.org/stable/c/513024d5a0e34fd34…

Impacted products

Vendor

Product

Version

Linux

Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7ec8ac9f73d4a9438c2186768d6de27ace37531e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d1dfe21a332d38a6a09658ec29a55940afb5fe36 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 73c7c2cdb442fc4160d2a2a4bfffbd162af06cb9 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 513024d5a0e34fd34247043f1876b6138ca52847 (git)

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": {
    "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": [
            {
              "lessThan": "7ec8ac9f73d4a9438c2186768d6de27ace37531e",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "d1dfe21a332d38a6a09658ec29a55940afb5fe36",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "73c7c2cdb442fc4160d2a2a4bfffbd162af06cb9",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "513024d5a0e34fd34247043f1876b6138ca52847",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "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": [
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.117",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.58",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.117",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.58",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18",
                  "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": "2025-12-08T00:46:36.903Z",
        "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",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "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"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-G3PF-JP95-CJC3

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

Tags

Sightings

Nomenclature