{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "b40656aa7d559adc1fe689396dc58b92a9a27286"
            },
            {
              "fixed": "09dc18894148381d3bfc550083b1236043870dce"
            },
            {
              "fixed": "eba5df21eda0fe7418efbea2f799f8ea1b8ca94c"
            },
            {
              "fixed": "2904e985a2917b5dac65df82733065e78a65fc9d"
            },
            {
              "fixed": "50334a05a950840b39a1ce3d2a173b4183db9b3e"
            },
            {
              "fixed": "badad6fad60def1b9805559dd81dbab3d97b82aa"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.143"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.94"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.36"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52908.json"
  },
  "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's 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",
  "modified": "2026-07-10T03:54:29.788918339Z",
  "published": "2026-06-19T14:00:35.971Z",
  "references": [
    {
      "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"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52908.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52908"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "RDMA: During rereg_mr ensure that REREG_ACCESS is compatible"
}