CVE-2022-50671 (GCVE-0-2022-50671)
Vulnerability from cvelistv5
Published
2025-12-09 01:29
Modified
2026-08-05 08:59
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix "kernel NULL pointer dereference" error When rxe_queue_init in the function rxe_qp_init_req fails, both qp->req.task.func and qp->req.task.arg are not initialized. Because of creation of qp fails, the function rxe_create_qp will call rxe_qp_do_cleanup to handle allocated resource. Before calling __rxe_do_task, both qp->req.task.func and qp->req.task.arg should be checked.
References
Impacted products
Vendor Product Version
Linux Linux Version: 8700e3e7c4857d28ebaa824509934556da0b3e76
Version: 8700e3e7c4857d28ebaa824509934556da0b3e76
Version: 8700e3e7c4857d28ebaa824509934556da0b3e76
Version: 8700e3e7c4857d28ebaa824509934556da0b3e76
Version: 8700e3e7c4857d28ebaa824509934556da0b3e76
Version: 8700e3e7c4857d28ebaa824509934556da0b3e76
Version: 8700e3e7c4857d28ebaa824509934556da0b3e76
Version: 8700e3e7c4857d28ebaa824509934556da0b3e76
Version: 8700e3e7c4857d28ebaa824509934556da0b3e76
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/sw/rxe/rxe_qp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "status": "affected",
              "version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
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              "versionType": "git"
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              "versionType": "git"
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/sw/rxe/rxe_qp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.8"
            },
            {
              "lessThan": "4.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.331",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.296",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.262",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.220",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.150",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.17",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.331",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.296",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.262",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.220",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.150",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.75",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19.17",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.3",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Fix \"kernel NULL pointer dereference\" error\n\nWhen rxe_queue_init in the function rxe_qp_init_req fails,\nboth qp-\u003ereq.task.func and qp-\u003ereq.task.arg are not initialized.\n\nBecause of creation of qp fails, the function rxe_create_qp will\ncall rxe_qp_do_cleanup to handle allocated resource.\n\nBefore calling __rxe_do_task, both qp-\u003ereq.task.func and\nqp-\u003ereq.task.arg should be checked."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - Soft RoCE (UDP/4791) backs network RDMA servers such as ksmbd SMB Direct and nvmet-rdma; on RDMA_CM CONNECT_REQUEST those ULPs create an IB_QPT_RC QP through rxe_create_qp, so a remote peer drives the vulnerable create/cleanup path.\nAC:L - A remote peer can open many Soft-RoCE RC connections until rxe_queue_init\u0027s vmalloc_user fails (ENOMEM), then the next create hits rxe_qp_do_cleanup with qp-\u003ereq.task.func == NULL and oopses deterministically; resource exhaustion and the failing create are attacker-controlled.\nPR:N - QP creation for ksmbd smbdirect and nvmet-rdma occurs on RDMA_CM CONNECT_REQUEST before any ULP authentication, so an unauthenticated network peer reaches the bug.\nUI:N - Exploitation needs only attacker-initiated RDMA CM connections (or local uverbs create_qp); no victim mount, click, or other interaction is required.\nS:U - The NULL function-pointer call crashes the host kernel within the same security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:N - The fault is a pure NULL instruction fetch (task-\u003efunc == NULL because the QP was kzalloc\u0027d and rxe_init_task never ran) with no UAF, OOB read, or other disclosure primitive.\nI:N - No memory is written or corrupted before the oops; there is no arbitrary write, type confusion, or control-flow hijack path from this bug alone.\nA:H - The NULL dereference produces a kernel oops/panic on the create-failure cleanup path (__rxe_do_task) and can be re-triggered by further connection attempts after resource exhaustion."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:59:20.301Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/48cd7098e71735ccafa0b3cf27c53924f9cb5b2f"
        },
        {
          "url": "https://git.kernel.org/stable/c/eca119693010032d6cc6e7e9b4fb2c363c7e12ce"
        },
        {
          "url": "https://git.kernel.org/stable/c/9c5dd6993c794703e74c6ba17ac78ca0211ef940"
        },
        {
          "url": "https://git.kernel.org/stable/c/0d773c58d702f0a7c16ee8d69617fd2c28350795"
        },
        {
          "url": "https://git.kernel.org/stable/c/cdce36a88def550773142a34ef727a830cad96a8"
        },
        {
          "url": "https://git.kernel.org/stable/c/f2f405af70e6f0419e718d23fa304798a5405c41"
        },
        {
          "url": "https://git.kernel.org/stable/c/bb33fa65da77f5f02dbee6f25cebaeedfcd70028"
        },
        {
          "url": "https://git.kernel.org/stable/c/3b8752f086eb6865cc3662ad13249b03024501e5"
        },
        {
          "url": "https://git.kernel.org/stable/c/a625ca30eff806395175ebad3ac1399014bdb280"
        }
      ],
      "title": "RDMA/rxe: Fix \"kernel NULL pointer dereference\" error",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50671",
    "datePublished": "2025-12-09T01:29:22.950Z",
    "dateReserved": "2025-12-09T01:26:45.991Z",
    "dateUpdated": "2026-08-05T08:59:20.301Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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