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CVE Record

CVE-2022-50671: RDMA/rxe: Fix "kernel NULL pointer dereference" error

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.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel bug in the RDMA/rxe component that can cause a kernel NULL pointer dereference during failed queue-pair creation cleanup. The public record does not provide CVSS, confirmed impact, or exploitation evidence. Treat it as a stability and availability concern for systems using this kernel RDMA path.

Executive priority

Handle through normal kernel patch governance unless RDMA/rxe is business-critical or broadly deployed. There is no public evidence of active exploitation, but kernel crashes can affect service availability. Prioritize exposed infrastructure and confirm vendor-fixed kernels.

Technical view

In RDMA/rxe, if rxe_queue_init fails inside rxe_qp_init_req, qp->req.task.func and arg may remain uninitialized. Cleanup via rxe_create_qp and rxe_qp_do_cleanup can reach __rxe_do_task without validating those fields, causing a NULL pointer dereference. Stable kernel commits add checks before task execution.

Likely exposure

Exposure appears limited to Linux systems with affected kernel code paths in RDMA/rxe. The source lists Linux kernel versions and stable commits, but does not define deployment prerequisites, remote reachability, or required privileges. Systems not using RDMA/rxe likely have lower practical exposure.

Exploitation context

No active exploitation is reported in the provided sources, and the CVE is not marked KEV. The record describes a failure-handling bug, not an exploit technique. Available evidence supports potential kernel crash or instability, but not privilege escalation or remote compromise.

Researcher notes

The public record lacks CVSS, CWE, attack vector, and privilege requirements. Analysis should focus on whether local RDMA/rxe queue-pair creation failure paths are reachable in your environment. Avoid assuming exploitability beyond the documented NULL pointer dereference.

Mitigation direction

  • Update to a Linux kernel containing the referenced stable fixes.
  • Use distribution kernel advisories to identify the fixed package for your platform.
  • Prioritize systems that use RDMA/rxe or software RoCE functionality.
  • If patch timing is unclear, request vendor guidance before applying compensating controls.

Validation and detection

  • Inventory Linux kernel versions across servers and appliances.
  • Identify hosts where RDMA/rxe functionality is enabled or required.
  • Confirm the running kernel includes the relevant upstream stable commit.
  • Check distribution security notes for CVE-2022-50671 fixed builds.
  • Review kernel logs for NULL pointer dereference events in RDMA/rxe paths.
Prepared
Confidence
medium
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2022-50671 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
10Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux8700e3e7c4857d28ebaa824509934556da0b3e76, 8700e3e7c4857d28ebaa824509934556da0b3e76, 8700e3e7c4857d28ebaa824509934556da0b3e76, 8700e3e7c4857d28ebaa824509934556da0b3e76, 8700e3e7c4857d28ebaa824509934556da0b3e76, 8700e3e7c4857d28ebaa824509934556da0b3e76, 8700e3e7c4857d28ebaa824509934556da0b3e76, 8700e3e7c4857d28ebaa824509934556da0b3e76, 8700e3e7c4857d28ebaa824509934556da0b3e76unaffected
LinuxLinux4.8, 0, 4.9.331, 4.14.296, 4.19.262, 5.4.220, 5.10.150, 5.15.75, 5.19.17, 6.0.3, 6.1affected
Weakness

CWE details

No CWE listed

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