{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "8700e3e7c4857d28ebaa824509934556da0b3e76"
            },
            {
              "fixed": "b7d2118660545a00b21e83010ded1a231c6fb8c5"
            },
            {
              "fixed": "5d9426a74fc8cb8f375fcdc19b465a030f9b8cab"
            },
            {
              "fixed": "2f3b705144e3a3c14184fec6e354680081fe91ec"
            },
            {
              "fixed": "3431f525718f6b07da308cda6d44f8cb548bbd37"
            },
            {
              "fixed": "d10e2a08799e858d3e71ea4169bcd018f216d444"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.8.0"
            },
            {
              "fixed": "6.6.158"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.112"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.54"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98365.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access\n\nmr_check_range() validates that [iova, iova+length) falls within the\nregistered MR range using wraparound-prone arithmetic:\n\n    if (iova \u003c mr-\u003eibmr.iova ||\n        iova + length \u003e mr-\u003eibmr.iova + mr-\u003eibmr.length)\n\nA remote peer can craft an RDMA-Write/Read RETH so that iova + length\nwraps to 0 (e.g. iova=0xfffffffffffffff8, length=8), bypassing the\ncheck. rxe_mr_iova_to_index() then computes a huge index (int idx, only\nguarded by WARN_ON) and rxe_mr_copy_xarray() dereferences\nmr-\u003epage_info[huge], causing an out-of-bounds read/write and a kernel\noops that is triggerable by an unauthenticated remote peer.\n\nRewrite the check in overflow-safe form; the first two clauses guarantee\nthat the subsequent subtractions do not underflow:\n\n    if (iova \u003c mr-\u003eibmr.iova ||\n        length \u003e mr-\u003eibmr.length ||\n        iova - mr-\u003eibmr.iova \u003e mr-\u003eibmr.length - length)\n\nWith the fix, mr_check_range() returns -EINVAL for the crafted iova and\nthe responder reports REMOTE_ACCESS_ERROR instead of triggering the OOB.",
  "id": "CVE-2026-98365",
  "modified": "2026-10-08T02:31:03.469039175Z",
  "published": "2026-10-06T08:46:50.834Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2f3b705144e3a3c14184fec6e354680081fe91ec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3431f525718f6b07da308cda6d44f8cb548bbd37"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5d9426a74fc8cb8f375fcdc19b465a030f9b8cab"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b7d2118660545a00b21e83010ded1a231c6fb8c5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d10e2a08799e858d3e71ea4169bcd018f216d444"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98365.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98365"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "RDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access"
}