FKIE_CVE-2026-52908

Vulnerability from fkie_nvd - Published: 2026-06-19 15:16 - Updated: 2026-10-19 20:18
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA: During rereg_mr ensure that REREG_ACCESS is compatible If IB_MR_REREG_ACCESS changes from RO to RW then the umem has to be re-evaluated to ensure it is properly pinned as RW. Since the umem is hidden inside each driver's mr struct add a ib_umem_check_rereg() function that each driver has to call before processing IB_MR_REREG_ACCESS. mlx4 has to retain its duplicate ib_access_writable check because it implements IB_MR_REREG_ACCESS | IB_MR_REREG_TRANS by changing both items in place sequentially while the MR is live, so it will continue to not support this combination.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/09dc18894148381d3bfc550083b1236043870dcePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2904e985a2917b5dac65df82733065e78a65fc9dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/50334a05a950840b39a1ce3d2a173b4183db9b3ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/badad6fad60def1b9805559dd81dbab3d97b82aaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eba5df21eda0fe7418efbea2f799f8ea1b8ca94cPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 7.1
linux linux_kernel 7.1
linux linux_kernel 7.1
linux linux_kernel 7.1
linux linux_kernel 7.1
linux linux_kernel 7.1
linux linux_kernel 7.1
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/core/umem.c",
            "drivers/infiniband/hw/hns/hns_roce_mr.c",
            "drivers/infiniband/hw/irdma/verbs.c",
            "drivers/infiniband/hw/mlx4/mr.c",
            "drivers/infiniband/hw/mlx5/mr.c",
            "drivers/infiniband/sw/rxe/rxe_verbs.c",
            "include/rdma/ib_umem.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "version": "b40656aa7d559adc1fe689396dc58b92a9a27286",
              "versionType": "git"
            },
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              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "b40656aa7d559adc1fe689396dc58b92a9a27286",
              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "b40656aa7d559adc1fe689396dc58b92a9a27286",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/core/umem.c",
            "drivers/infiniband/hw/hns/hns_roce_mr.c",
            "drivers/infiniband/hw/irdma/verbs.c",
            "drivers/infiniband/hw/mlx4/mr.c",
            "drivers/infiniband/hw/mlx5/mr.c",
            "drivers/infiniband/sw/rxe/rxe_verbs.c",
            "include/rdma/ib_umem.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.2"
            },
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.143",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.94",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.36",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
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          "cpeMatch": [
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          "negate": false,
          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA: During rereg_mr ensure that REREG_ACCESS is compatible\n\nIf IB_MR_REREG_ACCESS changes from RO to RW then the umem has to be\nre-evaluated to ensure it is properly pinned as RW. Since the umem is\nhidden inside each driver\u0027s mr struct add a ib_umem_check_rereg() function\nthat each driver has to call before processing IB_MR_REREG_ACCESS.\n\nmlx4 has to retain its duplicate ib_access_writable check because it\nimplements IB_MR_REREG_ACCESS | IB_MR_REREG_TRANS by changing both items\nin place sequentially while the MR is live, so it will continue to not\nsupport this combination."
    }
  ],
  "id": "CVE-2026-52908",
  "lastModified": "2026-10-19T20:18:44.910",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-52908",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-10-16T15:22:22.777962Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-19T15:16:35.277",
  "references": [
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      "tags": [
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      "url": "https://git.kernel.org/stable/c/09dc18894148381d3bfc550083b1236043870dce"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    },
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    },
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}



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