Vulnerability-Lookup

FKIE_CVE-2026-90308

Vulnerability from fkie_nvd - Published: 2026-09-17 17:17 - Updated: 2026-09-18 18:17

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: RDMA/erdma: Hold QP references for AE and CM processing AE QP fatal events and iWARP CM paths load QPs from dev->qp_xa and then use or reference them outside the xarray lock. erdma_destroy_qp() can drop the destroy-path reference and free QP resources while such a lookup is in flight. Add erdma_qp_get_by_qpn() to acquire a kref under the xarray lock with kref_get_unless_zero(). Remove the QP from the xarray before dropping the destroy-path reference so no new lookup can acquire it while destruction waits for existing users.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6e32f84b63c054e09392153125d7202abab2d14b
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a52eeff32024f190b3bdc99088c7becccd4fa60b
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c92686867638cda954fdb2bdbac8a75e3aa6eaae
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ec987c0654651036dad6a42f7fa2a6d7c16a3687

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/erdma/erdma_cm.c",
            "drivers/infiniband/hw/erdma/erdma_eq.c",
            "drivers/infiniband/hw/erdma/erdma_verbs.c",
            "drivers/infiniband/hw/erdma/erdma_verbs.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6e32f84b63c054e09392153125d7202abab2d14b",
              "status": "affected",
              "version": "155055771704f8cbb5c176a4309b7dc30a50450c",
              "versionType": "git"
            },
            {
              "lessThan": "ec987c0654651036dad6a42f7fa2a6d7c16a3687",
              "status": "affected",
              "version": "155055771704f8cbb5c176a4309b7dc30a50450c",
              "versionType": "git"
            },
            {
              "lessThan": "c92686867638cda954fdb2bdbac8a75e3aa6eaae",
              "status": "affected",
              "version": "155055771704f8cbb5c176a4309b7dc30a50450c",
              "versionType": "git"
            },
            {
              "lessThan": "a52eeff32024f190b3bdc99088c7becccd4fa60b",
              "status": "affected",
              "version": "155055771704f8cbb5c176a4309b7dc30a50450c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/erdma/erdma_cm.c",
            "drivers/infiniband/hw/erdma/erdma_eq.c",
            "drivers/infiniband/hw/erdma/erdma_verbs.c",
            "drivers/infiniband/hw/erdma/erdma_verbs.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "lessThan": "6.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/erdma: Hold QP references for AE and CM processing\n\nAE QP fatal events and iWARP CM paths load QPs from dev-\u003eqp_xa\nand then use or reference them outside the xarray lock.\nerdma_destroy_qp() can drop the destroy-path reference and free QP\nresources while such a lookup is in flight.\n\nAdd erdma_qp_get_by_qpn() to acquire a kref under the xarray\nlock with kref_get_unless_zero(). Remove the QP from the xarray\nbefore dropping the destroy-path reference so no new lookup can acquire\nit while destruction waits for existing users."
    }
  ],
  "id": "CVE-2026-90308",
  "lastModified": "2026-09-18T18:17:52.833",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-09-17T17:17:28.520",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6e32f84b63c054e09392153125d7202abab2d14b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a52eeff32024f190b3bdc99088c7becccd4fa60b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c92686867638cda954fdb2bdbac8a75e3aa6eaae"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ec987c0654651036dad6a42f7fa2a6d7c16a3687"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-90308 (GCVE-0-2026-90308)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:08 – Updated: 2026-09-18 17:54

Title

RDMA/erdma: Hold QP references for AE and CM processing

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/6e32f84b63c054e09…
https://git.kernel.org/stable/c/ec987c0654651036d…
https://git.kernel.org/stable/c/c92686867638cda95…
https://git.kernel.org/stable/c/a52eeff32024f190b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 155055771704f8cbb5c176a4309b7dc30a50450c , < 6e32f84b63c054e09392153125d7202abab2d14b (git) Affected: 155055771704f8cbb5c176a4309b7dc30a50450c , < ec987c0654651036dad6a42f7fa2a6d7c16a3687 (git) Affected: 155055771704f8cbb5c176a4309b7dc30a50450c , < c92686867638cda954fdb2bdbac8a75e3aa6eaae (git) Affected: 155055771704f8cbb5c176a4309b7dc30a50450c , < a52eeff32024f190b3bdc99088c7becccd4fa60b (git)
Linux	Linux	Affected: 6.0 Unaffected: 0 , < 6.0 (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.52 , ≤ 6.18.* (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/erdma/erdma_cm.c",
            "drivers/infiniband/hw/erdma/erdma_eq.c",
            "drivers/infiniband/hw/erdma/erdma_verbs.c",
            "drivers/infiniband/hw/erdma/erdma_verbs.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6e32f84b63c054e09392153125d7202abab2d14b",
              "status": "affected",
              "version": "155055771704f8cbb5c176a4309b7dc30a50450c",
              "versionType": "git"
            },
            {
              "lessThan": "ec987c0654651036dad6a42f7fa2a6d7c16a3687",
              "status": "affected",
              "version": "155055771704f8cbb5c176a4309b7dc30a50450c",
              "versionType": "git"
            },
            {
              "lessThan": "c92686867638cda954fdb2bdbac8a75e3aa6eaae",
              "status": "affected",
              "version": "155055771704f8cbb5c176a4309b7dc30a50450c",
              "versionType": "git"
            },
            {
              "lessThan": "a52eeff32024f190b3bdc99088c7becccd4fa60b",
              "status": "affected",
              "version": "155055771704f8cbb5c176a4309b7dc30a50450c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/erdma/erdma_cm.c",
            "drivers/infiniband/hw/erdma/erdma_eq.c",
            "drivers/infiniband/hw/erdma/erdma_verbs.c",
            "drivers/infiniband/hw/erdma/erdma_verbs.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "lessThan": "6.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.52",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.6",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/erdma: Hold QP references for AE and CM processing\n\nAE QP fatal events and iWARP CM paths load QPs from dev-\u003eqp_xa\nand then use or reference them outside the xarray lock.\nerdma_destroy_qp() can drop the destroy-path reference and free QP\nresources while such a lookup is in flight.\n\nAdd erdma_qp_get_by_qpn() to acquire a kref under the xarray\nlock with kref_get_unless_zero(). Remove the QP from the xarray\nbefore dropping the destroy-path reference so no new lookup can acquire\nit while destruction waits for existing users."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The UAF is a race between local ib_uverbs_destroy_qp()-\u003eerdma_destroy_qp() dropping the QP kref and either ucma_connect()/ucma_accept() (RDMA_USER_CM_CONNECT/ACCEPT -\u003e iw_cm_connect()/iw_cm_accept() -\u003e erdma_connect()/erdma_accept() xa_load of userspace params-\u003eqpn) or erdma_comm_irq_handler()-\u003eerdma_aeq_event_handler(). The CM QPN is rdma_ucm_conn_param.qp_num, not a remote iWARP/RoCE field.\nAC:L - The attacker who created the QP drives both sides: one thread issues ucma_connect()/ucma_accept() or QP ops that produce an AEQE, while another calls ib_uverbs_destroy_qp(), racing find_qp_by_qpn()/xa_load against the destroy-path erdma_qp_put(). The window (bare xa_load, then kref_get or no get at all) can be retried across many QPs.\nPR:L - ib_uverbs_open() and ucma_open() perform no capability check; uverbs_devnode() and ucma_misc.mode publish /dev/infiniband/uverbs* and /dev/infiniband/rdma_cm as 0666, so an unprivileged user on an ERDMA host can create_qp, RDMA_USER_CM_CONNECT/ACCEPT, and destroy_qp.\nUI:N - The attacker creates the QP via uverbs, issues ucma_connect()/ucma_accept() (or generates an AEQE) and ib_uverbs_destroy_qp() from their own processes; no other user must mount, open, or otherwise act.\nS:U - The use-after-free is of the host kernel\u0027s struct erdma_qp (kref, ibqp.event_handler, queue buffers) under the same kernel authority and does not cross a VM, IOMMU, or guest-host boundary.\nC:H - After erdma_destroy_qp() drops the last kref and the RDMA core frees the QP, erdma_aeq_event_handler() still reads qp-\u003eibqp.event_handler and qp_context from the freed object, and erdma_connect() may kref_get a freed QP; a sprayed replacement yields a kernel-memory read primitive.\nI:H - erdma_aeq_event_handler() invokes qp-\u003eibqp.event_handler on the freed erdma_qp, and erdma_connect()/erdma_accept() write qp-\u003ecep and take qp-\u003estate_lock after a lockless xa_load; reclaiming that object gives a function-pointer call and kernel writes.\nA:H - Using the QP after erdma_qp_put()/wait_for_completion() has released its queues and the ib_qp object causes a kernel oops or panic in erdma_aeq_event_handler() or in erdma_connect()/erdma_accept()."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-18T17:54:27.165Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6e32f84b63c054e09392153125d7202abab2d14b"
        },
        {
          "url": "https://git.kernel.org/stable/c/ec987c0654651036dad6a42f7fa2a6d7c16a3687"
        },
        {
          "url": "https://git.kernel.org/stable/c/c92686867638cda954fdb2bdbac8a75e3aa6eaae"
        },
        {
          "url": "https://git.kernel.org/stable/c/a52eeff32024f190b3bdc99088c7becccd4fa60b"
        }
      ],
      "title": "RDMA/erdma: Hold QP references for AE and CM processing",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90308",
    "datePublished": "2026-09-17T16:08:29.704Z",
    "dateReserved": "2026-09-11T19:38:34.800Z",
    "dateUpdated": "2026-09-18T17:54:27.165Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "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.
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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.

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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FKIE_CVE-2026-90308

CVE-2026-90308 (GCVE-0-2026-90308)

Tags

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