Vulnerability-Lookup

GHSA-5XGH-RMHF-2QQ8

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: Initialize re_id before removal registration

rpcrdma_create_id() registers ep->re_rn with the rpcrdma ib_client before returning the new rdma_cm_id to rpcrdma_ep_create(). However rpcrdma_ep_create() currently stores that pointer in ep->re_id only after rpcrdma_create_id() returns.

A local administrator can race an NFS/RDMA mount against RDMA device removal. If rpcrdma_remove_one() observes the just-registered notification before rpcrdma_ep_create() assigns ep->re_id, rpcrdma_ep_removal_done() calls trace_xprtrdma_device_removal(NULL). The tracepoint dereferences id->device->name and copies id->route.addr.dst_addr, so the callback can crash the kernel with a NULL pointer dereference.

Store the rdma_cm_id in ep->re_id immediately before publishing ep->re_rn. The existing error path still destroys the id directly if registration fails; ep is then freed by the caller without using ep->re_id. Remove the later duplicate assignment in rpcrdma_ep_create().

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72468"
  ],
  "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: Initialize re_id before removal registration\n\nrpcrdma_create_id() registers ep-\u003ere_rn with the rpcrdma ib_client\nbefore returning the new rdma_cm_id to rpcrdma_ep_create(). However\nrpcrdma_ep_create() currently stores that pointer in ep-\u003ere_id only\nafter rpcrdma_create_id() returns.\n\nA local administrator can race an NFS/RDMA mount against RDMA device\nremoval. If rpcrdma_remove_one() observes the just-registered\nnotification before rpcrdma_ep_create() assigns ep-\u003ere_id,\nrpcrdma_ep_removal_done() calls trace_xprtrdma_device_removal(NULL).\nThe tracepoint dereferences id-\u003edevice-\u003ename and copies\nid-\u003eroute.addr.dst_addr, so the callback can crash the kernel with a\nNULL pointer dereference.\n\nStore the rdma_cm_id in ep-\u003ere_id immediately before publishing\nep-\u003ere_rn. The existing error path still destroys the id directly if\nregistration fails; ep is then freed by the caller without using\nep-\u003ere_id. Remove the later duplicate assignment in rpcrdma_ep_create().",
  "id": "GHSA-5xgh-rmhf-2qq8",
  "modified": "2026-08-15T06:32:25Z",
  "published": "2026-08-15T06:32:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72468"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/264ccd7871915749bee55fe0c39467a7f08d5479"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/28743571c17b58c21a7216fc9faaf8028df5869b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/51248d877bbc6e604e38aeaf776c2781cb4f0dbd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bb7caa63e1db22fd03e8dc591b12169e99169dff"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-72468 (GCVE-0-2026-72468)

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

Title

xprtrdma: Initialize re_id before removal registration

Summary

In the Linux kernel, the following vulnerability has been resolved: xprtrdma: Initialize re_id before removal registration rpcrdma_create_id() registers ep->re_rn with the rpcrdma ib_client before returning the new rdma_cm_id to rpcrdma_ep_create(). However rpcrdma_ep_create() currently stores that pointer in ep->re_id only after rpcrdma_create_id() returns. A local administrator can race an NFS/RDMA mount against RDMA device removal. If rpcrdma_remove_one() observes the just-registered notification before rpcrdma_ep_create() assigns ep->re_id, rpcrdma_ep_removal_done() calls trace_xprtrdma_device_removal(NULL). The tracepoint dereferences id->device->name and copies id->route.addr.dst_addr, so the callback can crash the kernel with a NULL pointer dereference. Store the rdma_cm_id in ep->re_id immediately before publishing ep->re_rn. The existing error path still destroys the id directly if registration fails; ep is then freed by the caller without using ep->re_id. Remove the later duplicate assignment in rpcrdma_ep_create().

Severity

No CVSS data available.

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/51248d877bbc6e604…
https://git.kernel.org/stable/c/28743571c17b58c21…
https://git.kernel.org/stable/c/264ccd7871915749b…
https://git.kernel.org/stable/c/bb7caa63e1db22fd0…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 3f4eb9ff923413cdb4c7e171c06d3564f6286712 , < 51248d877bbc6e604e38aeaf776c2781cb4f0dbd (git) Affected: 3f4eb9ff923413cdb4c7e171c06d3564f6286712 , < 28743571c17b58c21a7216fc9faaf8028df5869b (git) Affected: 3f4eb9ff923413cdb4c7e171c06d3564f6286712 , < 264ccd7871915749bee55fe0c39467a7f08d5479 (git) Affected: 3f4eb9ff923413cdb4c7e171c06d3564f6286712 , < bb7caa63e1db22fd03e8dc591b12169e99169dff (git)
Linux	Linux	Affected: 6.11 Unaffected: 0 , < 6.11 (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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JSON

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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sunrpc/xprtrdma/verbs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "51248d877bbc6e604e38aeaf776c2781cb4f0dbd",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "28743571c17b58c21a7216fc9faaf8028df5869b",
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              "version": "3f4eb9ff923413cdb4c7e171c06d3564f6286712",
              "versionType": "git"
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              "versionType": "git"
            },
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              "versionType": "git"
            }
          ]
        },
        {
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "lessThan": "6.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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                  "versionStartIncluding": "6.11",
                  "vulnerable": true
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                {
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxprtrdma: Initialize re_id before removal registration\n\nrpcrdma_create_id() registers ep-\u003ere_rn with the rpcrdma ib_client\nbefore returning the new rdma_cm_id to rpcrdma_ep_create(). However\nrpcrdma_ep_create() currently stores that pointer in ep-\u003ere_id only\nafter rpcrdma_create_id() returns.\n\nA local administrator can race an NFS/RDMA mount against RDMA device\nremoval. If rpcrdma_remove_one() observes the just-registered\nnotification before rpcrdma_ep_create() assigns ep-\u003ere_id,\nrpcrdma_ep_removal_done() calls trace_xprtrdma_device_removal(NULL).\nThe tracepoint dereferences id-\u003edevice-\u003ename and copies\nid-\u003eroute.addr.dst_addr, so the callback can crash the kernel with a\nNULL pointer dereference.\n\nStore the rdma_cm_id in ep-\u003ere_id immediately before publishing\nep-\u003ere_rn. The existing error path still destroys the id directly if\nregistration fails; ep is then freed by the caller without using\nep-\u003ere_id. Remove the later duplicate assignment in rpcrdma_ep_create()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:15:13.672Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
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      "title": "xprtrdma: Initialize re_id before removal registration",
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    "cveId": "CVE-2026-72468",
    "datePublished": "2026-08-15T05:57:11.171Z",
    "dateReserved": "2026-08-09T03:40:39.933Z",
    "dateUpdated": "2026-08-17T05:15:13.672Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}

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.

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GHSA-5XGH-RMHF-2QQ8

CVE-2026-72468 (GCVE-0-2026-72468)

Tags

Sightings

Nomenclature