RDMA/rxe: Fix mr->map double free

{
  "id": "b29e95af84ff8830b9f83fb0fb45d453ffe961dfa98218bc2ca92bb10b63dfa6",
  "url": "https://osv.dev/vulnerability/CVE-2022-50543",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "RDMA/rxe: Fix mr->map double free",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix mr->map double free rxe_mr_cleanup() which tries to free mr->map again will be called when rxe_mr_init_user() fails: CPU: 0 PID: 4917 Comm: rdma_flush_serv Kdump: loaded Not tainted 6.1.0-rc1-roce-flush+ #25 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014 Call Trace: dump_stack_lvl+0x45/0x5d panic+0x19e/0x349 end_report.part.0+0x54/0x7c kasan_report.cold+0xa/0xf rxe_mr_cleanup+0x9d/0xf0 [rdma_rxe] __rxe_cleanup+0x10a/0x1e0 [rdma_rxe] rxe_reg_user_mr+0xb7/0xd0 [rdma_rxe] ib_uverbs_reg_mr+0x26a/0x480 [ib_uverbs] ib_uverbs_handler_UVERBS_METHOD_INVOKE_WRITE+0x1a2/0x250 [ib_uverbs] ib_uverbs_cmd_verbs+0x1397/0x15a0 [ib_uverbs] This issue was firstly exposed since commit b18c7da63fcb (\"RDMA/rxe: Fix memory leak in error path code\") and then we fixed it in commit 8ff5f5d9d8cf (\"RDMA/rxe: Prevent double freeing rxe_map_set()\") but this fix was reverted together at last by commit 1e75550648da (Revert \"RDMA/rxe: Create duplicate mapping tables for FMRs\") Simply let rxe_mr_cleanup() always handle freeing the mr->map once it is successfully allocated.",
    "evidence": "osv:CVE-2022-50543",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.0.16",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2022-50543",
      "aliases": [
        "CVE-2022-50543"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1e75550648da1fa1cd1969e7597355de8fe8caf6"
                },
                {
                  "fixed": "6ce577f09013206e36e674cd27da3707b2278268"
                },
                {
                  "fixed": "06f73568f553b5be6ba7f6fe274d333ea29fc46d"
                },
                {
                  "fixed": "7d984dac8f6bf4ebd3398af82b357e1d181ecaac"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5.19.4"
                },
                {
                  "fixed": "5.20"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "e004a35e8148ad9fc438b0479884641acf382896"
                }
              ]
            }
          ],
          "versions": [
            "v5.19.17",
            "v5.19.16",
            "v5.19.15",
            "v5.19.14",
            "v5.19.13",
            "v5.19.12",
            "v5.19.11",
            "v5.19.10",
            "v5.19.9",
            "v5.19.8",
            "v5.19.7",
            "v5.19.6",
            "v5.19.5",
            "v5.19.4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50543.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.0.0"
                },
                {
                  "fixed": "6.0.16"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.1.0"
                },
                {
                  "fixed": "6.1.2"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50543.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.698454672Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/06f73568f553b5be6ba7f6fe274d333ea29fc46d",
        "https://git.kernel.org/stable/c/6ce577f09013206e36e674cd27da3707b2278268",
        "https://git.kernel.org/stable/c/7d984dac8f6bf4ebd3398af82b357e1d181ecaac",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50543.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50543",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50543.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-50543",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 497437,
  "published_at": "2025-10-07T15:21:07.939+00:00"
}