Vulnerability-Lookup

GHSA-4QHC-6R4V-5WMG

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-15 06:32

Details

In the Linux kernel, the following vulnerability has been resolved:

xprtrdma: Check frwr_wp_create() during connect

frwr_wp_create() creates the singleton Memory Region used to encode padding for Write chunks whose payload length is not XDR-aligned. Its failure paths return a negative errno and leave ep->re_write_pad_mr set to NULL.

rpcrdma_xprt_connect() currently ignores that return value. If frwr_wp_create() fails after the rest of the connection setup succeeds, xprt_rdma_connect_worker() treats the connection attempt as successful and sets XPRT_CONNECTED. A later NFS/RDMA read with a non-4-byte-aligned receive page length reaches rpcrdma_encode_write_list(), passes the NULL write-pad MR to encode_rdma_segment(), and dereferences it.

This is locally triggerable on an NFS/RDMA client after a connect or reconnect hits a local MR allocation, DMA-map, MR-map, or post-send failure; a remote peer alone cannot force the local MR setup failure.

Check the return value and fail the connect as -ENOTCONN, matching the adjacent setup failures. This keeps XPRT_CONNECTED clear and lets the normal reconnect path retry.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72467"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:20Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxprtrdma: Check frwr_wp_create() during connect\n\nfrwr_wp_create() creates the singleton Memory Region used to encode\npadding for Write chunks whose payload length is not XDR-aligned. Its\nfailure paths return a negative errno and leave ep-\u003ere_write_pad_mr set\nto NULL.\n\nrpcrdma_xprt_connect() currently ignores that return value. If\nfrwr_wp_create() fails after the rest of the connection setup succeeds,\nxprt_rdma_connect_worker() treats the connection attempt as successful\nand sets XPRT_CONNECTED. A later NFS/RDMA read with a non-4-byte-aligned\nreceive page length reaches rpcrdma_encode_write_list(), passes the NULL\nwrite-pad MR to encode_rdma_segment(), and dereferences it.\n\nThis is locally triggerable on an NFS/RDMA client after a connect or\nreconnect hits a local MR allocation, DMA-map, MR-map, or post-send\nfailure; a remote peer alone cannot force the local MR setup failure.\n\nCheck the return value and fail the connect as -ENOTCONN, matching the\nadjacent setup failures. This keeps XPRT_CONNECTED clear and lets the\nnormal reconnect path retry.",
  "id": "GHSA-4qhc-6r4v-5wmg",
  "modified": "2026-08-15T06:32:25Z",
  "published": "2026-08-15T06:32:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72467"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0f13fc7c7d2e0427517e63c739277a4cd338b0c5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3b252fe1778b2cdd68283146455929801bc2abd7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6b7be4f3feae322f1c2c40a3bdc99db93574a49e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7471e66373a4444a57ef2192f8c4081202c54f45"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd798b76a3481e392820c3ae86ed4592858c6b0f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ef3b79edf14b6bfb0d21a26ccb0463f9cf82c6a9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-72467 (GCVE-0-2026-72467)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:57 – Updated: 2026-08-17 05:15

Title

xprtrdma: Check frwr_wp_create() during connect

Summary

In the Linux kernel, the following vulnerability has been resolved: xprtrdma: Check frwr_wp_create() during connect frwr_wp_create() creates the singleton Memory Region used to encode padding for Write chunks whose payload length is not XDR-aligned. Its failure paths return a negative errno and leave ep->re_write_pad_mr set to NULL. rpcrdma_xprt_connect() currently ignores that return value. If frwr_wp_create() fails after the rest of the connection setup succeeds, xprt_rdma_connect_worker() treats the connection attempt as successful and sets XPRT_CONNECTED. A later NFS/RDMA read with a non-4-byte-aligned receive page length reaches rpcrdma_encode_write_list(), passes the NULL write-pad MR to encode_rdma_segment(), and dereferences it. This is locally triggerable on an NFS/RDMA client after a connect or reconnect hits a local MR allocation, DMA-map, MR-map, or post-send failure; a remote peer alone cannot force the local MR setup failure. Check the return value and fail the connect as -ENOTCONN, matching the adjacent setup failures. This keeps XPRT_CONNECTED clear and lets the normal reconnect path retry.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

6 references

URL	Tags
https://git.kernel.org/stable/c/3b252fe1778b2cdd6…
https://git.kernel.org/stable/c/dd798b76a3481e392…
https://git.kernel.org/stable/c/6b7be4f3feae322f1…
https://git.kernel.org/stable/c/7471e66373a4444a5…
https://git.kernel.org/stable/c/ef3b79edf14b6bfb0…
https://git.kernel.org/stable/c/0f13fc7c7d2e04275…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 21037b8c2258ec40de3b31be9ced43ceb3b784f7 , < 3b252fe1778b2cdd68283146455929801bc2abd7 (git) Affected: 21037b8c2258ec40de3b31be9ced43ceb3b784f7 , < dd798b76a3481e392820c3ae86ed4592858c6b0f (git) Affected: 21037b8c2258ec40de3b31be9ced43ceb3b784f7 , < 6b7be4f3feae322f1c2c40a3bdc99db93574a49e (git) Affected: 21037b8c2258ec40de3b31be9ced43ceb3b784f7 , < 7471e66373a4444a57ef2192f8c4081202c54f45 (git) Affected: 21037b8c2258ec40de3b31be9ced43ceb3b784f7 , < ef3b79edf14b6bfb0d21a26ccb0463f9cf82c6a9 (git) Affected: 21037b8c2258ec40de3b31be9ced43ceb3b784f7 , < 0f13fc7c7d2e0427517e63c739277a4cd338b0c5 (git)
Linux	Linux	Affected: 5.16 Unaffected: 0 , < 5.16 (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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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.