{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "d03fb5c6599e31b90c6b5f65d43d6ccc6b49eb91"
            },
            {
              "fixed": "5f1933163327c9f1c8f2a341c6cb551aaf231ff9"
            },
            {
              "fixed": "4cfb448705da3171d44d9cbe7be53ff03284d532"
            },
            {
              "fixed": "51f2c8d2c99fc1f452f7113c08a35edcc4bf8732"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.15.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90423.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Fix UAF in ODP init error-handling path\n\nrxe_odp_mr_init_user() stores \u0026umem_odp-\u003eumem in mr-\u003eumem before\ncalling rxe_odp_init_pages(). If rxe_odp_init_pages() fails,\nrxe_odp_mr_init_user() releases umem_odp and returns an error.\n\nrxe_reg_user_mr() then unwinds the error through rxe_cleanup(),\nrxe_mr_cleanup(), ib_umem_release(mr-\u003eumem). There is an\nIS_ERR_OR_NULL(umem) check at the start of ib_umem_release().\nBut since mr-\u003eumem is NOT reset to NULL in the error handling\npath of rxe_odp_mr_init_user(), the check passes and it reads\nalready-freed fields like umem-\u003eis_dmabuf, causing UAF.\n\nFix the UAF by clearing mr-\u003eumem after releasing the failed\nODP umem so the MR cleanup path does not release it again.",
  "id": "CVE-2026-90423",
  "modified": "2026-09-19T03:30:20.256712871Z",
  "published": "2026-09-17T16:09:46.513Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4cfb448705da3171d44d9cbe7be53ff03284d532"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/51f2c8d2c99fc1f452f7113c08a35edcc4bf8732"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5f1933163327c9f1c8f2a341c6cb551aaf231ff9"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90423.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90423"
    },
    {
      "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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "RDMA/rxe: Fix UAF in ODP init error-handling path"
}