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CVE-2022-50671 (GCVE-0-2022-50671)

Vulnerability from cvelistv5 – Published: 2025-12-09 01:29 – Updated: 2026-08-05 08:59
VLAI
Title
RDMA/rxe: Fix "kernel NULL pointer dereference" error
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < 48cd7098e71735ccafa0b3cf27c53924f9cb5b2f (git)
Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < eca119693010032d6cc6e7e9b4fb2c363c7e12ce (git)
Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < 9c5dd6993c794703e74c6ba17ac78ca0211ef940 (git)
Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < 0d773c58d702f0a7c16ee8d69617fd2c28350795 (git)
Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < cdce36a88def550773142a34ef727a830cad96a8 (git)
Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < f2f405af70e6f0419e718d23fa304798a5405c41 (git)
Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < bb33fa65da77f5f02dbee6f25cebaeedfcd70028 (git)
Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < 3b8752f086eb6865cc3662ad13249b03024501e5 (git)
Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < a625ca30eff806395175ebad3ac1399014bdb280 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.8
Unaffected: 0 , < 4.8 (semver)
Unaffected: 4.9.331 , ≤ 4.9.* (semver)
Unaffected: 4.14.296 , ≤ 4.14.* (semver)
Unaffected: 4.19.262 , ≤ 4.19.* (semver)
Unaffected: 5.4.220 , ≤ 5.4.* (semver)
Unaffected: 5.10.150 , ≤ 5.10.* (semver)
Unaffected: 5.15.75 , ≤ 5.15.* (semver)
Unaffected: 5.19.17 , ≤ 5.19.* (semver)
Unaffected: 6.0.3 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
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          "product": "Linux",
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          "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."
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              "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."
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        {
          "url": "https://git.kernel.org/stable/c/a625ca30eff806395175ebad3ac1399014bdb280"
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    "datePublished": "2025-12-09T01:29:22.950Z",
    "dateReserved": "2025-12-09T01:26:45.991Z",
    "dateUpdated": "2026-08-05T08:59:20.301Z",
    "state": "PUBLISHED"
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            "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."
          }
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        "id": "CVE-2022-50671",
        "lastModified": "2026-08-04T10:18:20.933",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
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              "impactScore": 3.6,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
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        "published": "2025-12-09T16:17:19.227",
        "references": [
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          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/f2f405af70e6f0419e718d23fa304798a5405c41"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T19:38:17+00:00",
      "cve": "CVE-2022-50671",
      "id": "CVE-2022-50671",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "120",
      "product_status:known_affected": "152",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: RDMA/rxe: Fix \"kernel NULL pointer dereference\" error",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50671.json",
      "version": "3"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.