{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "aae0484e15f062ad2c2502e68e15dfb8b8f84608"
            },
            {
              "fixed": "b98ab5494dbd48652561aa0b9c32f10500220745"
            },
            {
              "fixed": "d493e0bfc748a520c349d6c8791b262aa5ad2e4e"
            },
            {
              "fixed": "9abff51163aa1bc275ec356f74fe976291860a7f"
            },
            {
              "fixed": "26793db60925df1e88a29466813d586cbc190b8c"
            },
            {
              "fixed": "ce6f8e007682f378279d4cf83b240f12d52c723b"
            },
            {
              "fixed": "5c07aef09a121a4cd622a71eb0753a9e135c84a8"
            },
            {
              "fixed": "26a9cfe12f4ffdeaa136f252478986fa5f397ddc"
            },
            {
              "fixed": "0beefd0e15d962f497aad750b2d5e9c3570b66d1"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "350703fae672d4d649c3562c199eab5ec9dc7c79"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "4.19.86"
            },
            {
              "fixed": "4.20"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.20.0"
            },
            {
              "fixed": "5.10.259"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.210"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.176"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.128"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.75"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.14"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45852.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Fix double free in rxe_srq_from_init\n\nIn rxe_srq_from_init(), the queue pointer 'q' is assigned to\n'srq-\u003erq.queue' before copying the SRQ number to user space.\nIf copy_to_user() fails, the function calls rxe_queue_cleanup()\nto free the queue, but leaves the now-invalid pointer in\n'srq-\u003erq.queue'.\n\nThe caller of rxe_srq_from_init() (rxe_create_srq) eventually\ncalls rxe_srq_cleanup() upon receiving the error, which triggers\na second rxe_queue_cleanup() on the same memory, leading to a\ndouble free.\n\nThe call trace looks like this:\n   kmem_cache_free+0x.../0x...\n   rxe_queue_cleanup+0x1a/0x30 [rdma_rxe]\n   rxe_srq_cleanup+0x42/0x60 [rdma_rxe]\n   rxe_elem_release+0x31/0x70 [rdma_rxe]\n   rxe_create_srq+0x12b/0x1a0 [rdma_rxe]\n   ib_create_srq_user+0x9a/0x150 [ib_core]\n\nFix this by moving 'srq-\u003erq.queue = q' after copy_to_user.",
  "id": "CVE-2026-45852",
  "modified": "2026-07-08T05:36:39.456233429Z",
  "published": "2026-05-27T12:15:26.084Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0beefd0e15d962f497aad750b2d5e9c3570b66d1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/26793db60925df1e88a29466813d586cbc190b8c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/26a9cfe12f4ffdeaa136f252478986fa5f397ddc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5c07aef09a121a4cd622a71eb0753a9e135c84a8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9abff51163aa1bc275ec356f74fe976291860a7f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b98ab5494dbd48652561aa0b9c32f10500220745"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ce6f8e007682f378279d4cf83b240f12d52c723b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d493e0bfc748a520c349d6c8791b262aa5ad2e4e"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45852.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:25120"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:25121"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:25217"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:27713"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:33899"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:34094"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:35844"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:35863"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:35896"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/security/cve/CVE-2026-45852"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45852.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45852"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482166"
    },
    {
      "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/rxe: Fix double free in rxe_srq_from_init"
}