Vulnerability-Lookup

CVE-2026-52908 (GCVE-0-2026-52908)

Vulnerability from cvelistv5 – Published: 2026-06-19 14:00 – Updated: 2026-06-19 14:00

Title

RDMA: During rereg_mr ensure that REREG_ACCESS is compatible

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.

Severity

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/09dc18894148381d3…
https://git.kernel.org/stable/c/eba5df21eda0fe741…
https://git.kernel.org/stable/c/2904e985a2917b5da…
https://git.kernel.org/stable/c/50334a05a950840b3…
https://git.kernel.org/stable/c/badad6fad60def1b9…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: b40656aa7d559adc1fe689396dc58b92a9a27286 , < 09dc18894148381d3bfc550083b1236043870dce (git) Affected: b40656aa7d559adc1fe689396dc58b92a9a27286 , < eba5df21eda0fe7418efbea2f799f8ea1b8ca94c (git) Affected: b40656aa7d559adc1fe689396dc58b92a9a27286 , < 2904e985a2917b5dac65df82733065e78a65fc9d (git) Affected: b40656aa7d559adc1fe689396dc58b92a9a27286 , < 50334a05a950840b39a1ce3d2a173b4183db9b3e (git) Affected: b40656aa7d559adc1fe689396dc58b92a9a27286 , < badad6fad60def1b9805559dd81dbab3d97b82aa (git)
Linux	Linux	Affected: 6.2 Unaffected: 0 , < 6.2 (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.94 , ≤ 6.12.* (semver) Unaffected: 6.18.36 , ≤ 6.18.* (semver) Unaffected: 7.0.13 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "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": [
            {
              "lessThan": "09dc18894148381d3bfc550083b1236043870dce",
              "status": "affected",
              "version": "b40656aa7d559adc1fe689396dc58b92a9a27286",
              "versionType": "git"
            },
            {
              "lessThan": "eba5df21eda0fe7418efbea2f799f8ea1b8ca94c",
              "status": "affected",
              "version": "b40656aa7d559adc1fe689396dc58b92a9a27286",
              "versionType": "git"
            },
            {
              "lessThan": "2904e985a2917b5dac65df82733065e78a65fc9d",
              "status": "affected",
              "version": "b40656aa7d559adc1fe689396dc58b92a9a27286",
              "versionType": "git"
            },
            {
              "lessThan": "50334a05a950840b39a1ce3d2a173b4183db9b3e",
              "status": "affected",
              "version": "b40656aa7d559adc1fe689396dc58b92a9a27286",
              "versionType": "git"
            },
            {
              "lessThan": "badad6fad60def1b9805559dd81dbab3d97b82aa",
              "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.143",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "6.12.94",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.36",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.13",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-19T14:00:35.971Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/09dc18894148381d3bfc550083b1236043870dce"
        },
        {
          "url": "https://git.kernel.org/stable/c/eba5df21eda0fe7418efbea2f799f8ea1b8ca94c"
        },
        {
          "url": "https://git.kernel.org/stable/c/2904e985a2917b5dac65df82733065e78a65fc9d"
        },
        {
          "url": "https://git.kernel.org/stable/c/50334a05a950840b39a1ce3d2a173b4183db9b3e"
        },
        {
          "url": "https://git.kernel.org/stable/c/badad6fad60def1b9805559dd81dbab3d97b82aa"
        }
      ],
      "title": "RDMA: During rereg_mr ensure that REREG_ACCESS is compatible",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-52908",
    "datePublished": "2026-06-19T14:00:35.971Z",
    "dateReserved": "2026-06-09T07:44:35.366Z",
    "dateUpdated": "2026-06-19T14:00:35.971Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

GHSA-2M6M-R8C9-84HH

Vulnerability from github – Published: 2026-06-19 15:33 – Updated: 2026-06-19 15:33

Details

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.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-52908"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-19T15:16:35Z",
    "severity": null
  },
  "details": "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": "GHSA-2m6m-r8c9-84hh",
  "modified": "2026-06-19T15:33:19Z",
  "published": "2026-06-19T15:33:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52908"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/09dc18894148381d3bfc550083b1236043870dce"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2904e985a2917b5dac65df82733065e78a65fc9d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/50334a05a950840b39a1ce3d2a173b4183db9b3e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/badad6fad60def1b9805559dd81dbab3d97b82aa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eba5df21eda0fe7418efbea2f799f8ea1b8ca94c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

Sightings

Author	Source	Type	Date	Other

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

CVE-2026-52908 (GCVE-0-2026-52908)

GHSA-2M6M-R8C9-84HH

Tags

Sightings

Nomenclature