Vulnerability-Lookup

CVE-2026-92525 (GCVE-0-2026-92525)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:10 – Updated: 2026-09-17 16:10

Title

RDMA/rxe: Validate num_sge/cur_sge before indexing wqe->dma.sge[]

Summary

In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Validate num_sge/cur_sge before indexing wqe->dma.sge[] For a user QP, qp->sq.queue is a ring the application writes directly, so rxe_post_send() takes the is_user branch and only schedules send_task without validating the WQE. rxe_requester() consumes it in place via req_next_wqe() and calls copy_data(), which indexes &wqe->dma.sge[cur_sge] with the attacker-controlled num_sge/cur_sge. Only the kernel path bounds num_sge (validate_send_wr()); the user WQE is never checked, so a local unprivileged user can post a WQE with an out-of-range cur_sge or oversized num_sge and force an out-of-bounds read of the per-WQE sge array in copy_data() (vmalloc OOB read, local DoS). Bound num_sge to qp->sq.max_sge in rxe_requester() before use, the way get_srq_wqe() already guards SRQ entries, and bound cur_sge only when the WQE carries payload (dma.resid): copy_data() returns early on a zero-length copy before touching dma->sge[], so a zero-payload WQE -- the only kind a max_sge == 0 QP can post -- stays valid. Reproduced under KASAN; the vmalloc-out-of-bounds in copy_data() is gone.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

6 references

URL	Tags
https://git.kernel.org/stable/c/69d3ccf6543f24c45…
https://git.kernel.org/stable/c/750bba6ce9bb0b11d…
https://git.kernel.org/stable/c/c067aa7b231e91a18…
https://git.kernel.org/stable/c/13cb7160e5b791f5e…
https://git.kernel.org/stable/c/5ec111ddc1f727c1e…
https://git.kernel.org/stable/c/126c757e4cd46f866…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < 69d3ccf6543f24c452a020c8028ca6f46cb1e8db (git) Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < 750bba6ce9bb0b11d6a166031c9728ae3f21765e (git) Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < c067aa7b231e91a18a1b3666201ab14dfb00347a (git) Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < 13cb7160e5b791f5e3ecf9311cf32849fe7e9b62 (git) Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < 5ec111ddc1f727c1e4580aea459842ae5a8359a5 (git) Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < 126c757e4cd46f866ddc283143b58eb4d9bf52cd (git)	guessed
Linux	Linux	Affected: 4.8 Unaffected: 0 , < 4.8 (semver) Unaffected: 6.1.188 , ≤ 6.1.* (semver) Unaffected: 6.6.157 , ≤ 6.6.* (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)	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/sw/rxe/rxe_req.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "versions": [
            {
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              "versionType": "git"
            },
            {
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              "versionType": "git"
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              "versionType": "git"
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            {
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.8"
            },
            {
              "lessThan": "4.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "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": "6.1.188",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.52",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.6",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Validate num_sge/cur_sge before indexing wqe-\u003edma.sge[]\n\nFor a user QP, qp-\u003esq.queue is a ring the application writes directly,\nso rxe_post_send() takes the is_user branch and only schedules send_task\nwithout validating the WQE. rxe_requester() consumes it in place via\nreq_next_wqe() and calls copy_data(), which indexes\n\u0026wqe-\u003edma.sge[cur_sge] with the attacker-controlled num_sge/cur_sge.\nOnly the kernel path bounds num_sge (validate_send_wr()); the user WQE\nis never checked, so a local unprivileged user can post a WQE with an\nout-of-range cur_sge or oversized num_sge and force an out-of-bounds\nread of the per-WQE sge array in copy_data() (vmalloc OOB read, local\nDoS).\n\nBound num_sge to qp-\u003esq.max_sge in rxe_requester() before use, the way\nget_srq_wqe() already guards SRQ entries, and bound cur_sge only when\nthe WQE carries payload (dma.resid): copy_data() returns early on a\nzero-length copy before touching dma-\u003esge[], so a zero-payload WQE --\nthe only kind a max_sge == 0 QP can post -- stays valid.\n\nReproduced under KASAN; the vmalloc-out-of-bounds in copy_data() is gone."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:10:30.789Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/69d3ccf6543f24c452a020c8028ca6f46cb1e8db"
        },
        {
          "url": "https://git.kernel.org/stable/c/750bba6ce9bb0b11d6a166031c9728ae3f21765e"
        },
        {
          "url": "https://git.kernel.org/stable/c/c067aa7b231e91a18a1b3666201ab14dfb00347a"
        },
        {
          "url": "https://git.kernel.org/stable/c/13cb7160e5b791f5e3ecf9311cf32849fe7e9b62"
        },
        {
          "url": "https://git.kernel.org/stable/c/5ec111ddc1f727c1e4580aea459842ae5a8359a5"
        },
        {
          "url": "https://git.kernel.org/stable/c/126c757e4cd46f866ddc283143b58eb4d9bf52cd"
        }
      ],
      "title": "RDMA/rxe: Validate num_sge/cur_sge before indexing wqe-\u003edma.sge[]",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-92525",
    "datePublished": "2026-09-17T16:10:30.789Z",
    "dateReserved": "2026-09-16T12:21:13.875Z",
    "dateUpdated": "2026-09-17T16:10:30.789Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/infiniband/sw/rxe/rxe_req.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "69d3ccf6543f24c452a020c8028ca6f46cb1e8db",
                    "status": "affected",
                    "version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "750bba6ce9bb0b11d6a166031c9728ae3f21765e",
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                    "versionType": "git"
                  },
                  {
                    "lessThan": "c067aa7b231e91a18a1b3666201ab14dfb00347a",
                    "status": "affected",
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                    "versionType": "git"
                  },
                  {
                    "lessThan": "13cb7160e5b791f5e3ecf9311cf32849fe7e9b62",
                    "status": "affected",
                    "version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "5ec111ddc1f727c1e4580aea459842ae5a8359a5",
                    "status": "affected",
                    "version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "126c757e4cd46f866ddc283143b58eb4d9bf52cd",
                    "status": "affected",
                    "version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/infiniband/sw/rxe/rxe_req.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "4.8"
                  },
                  {
                    "lessThan": "4.8",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.188",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.157",
                    "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/rxe: Validate num_sge/cur_sge before indexing wqe-\u003edma.sge[]\n\nFor a user QP, qp-\u003esq.queue is a ring the application writes directly,\nso rxe_post_send() takes the is_user branch and only schedules send_task\nwithout validating the WQE. rxe_requester() consumes it in place via\nreq_next_wqe() and calls copy_data(), which indexes\n\u0026wqe-\u003edma.sge[cur_sge] with the attacker-controlled num_sge/cur_sge.\nOnly the kernel path bounds num_sge (validate_send_wr()); the user WQE\nis never checked, so a local unprivileged user can post a WQE with an\nout-of-range cur_sge or oversized num_sge and force an out-of-bounds\nread of the per-WQE sge array in copy_data() (vmalloc OOB read, local\nDoS).\n\nBound num_sge to qp-\u003esq.max_sge in rxe_requester() before use, the way\nget_srq_wqe() already guards SRQ entries, and bound cur_sge only when\nthe WQE carries payload (dma.resid): copy_data() returns early on a\nzero-length copy before touching dma-\u003esge[], so a zero-payload WQE --\nthe only kind a max_sge == 0 QP can post -- stays valid.\n\nReproduced under KASAN; the vmalloc-out-of-bounds in copy_data() is gone."
          }
        ],
        "id": "CVE-2026-92525",
        "lastModified": "2026-09-17T17:17:55.540",
        "metrics": {},
        "published": "2026-09-17T17:17:55.540",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/126c757e4cd46f866ddc283143b58eb4d9bf52cd"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/13cb7160e5b791f5e3ecf9311cf32849fe7e9b62"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/5ec111ddc1f727c1e4580aea459842ae5a8359a5"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/69d3ccf6543f24c452a020c8028ca6f46cb1e8db"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/750bba6ce9bb0b11d6a166031c9728ae3f21765e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/c067aa7b231e91a18a1b3666201ab14dfb00347a"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-09-18T00:13:11Z",
      "cve": "CVE-2026-92525",
      "id": "CVE-2026-92525",
      "initial_release_date": "2026-09-18T00:13:11Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-92525",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-92525.json",
      "version": "2"
    }
  }
}

FKIE_CVE-2026-92525

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

Severity

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/126c757e4cd46f866ddc283143b58eb4d9bf52cd
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/13cb7160e5b791f5e3ecf9311cf32849fe7e9b62
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5ec111ddc1f727c1e4580aea459842ae5a8359a5
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/69d3ccf6543f24c452a020c8028ca6f46cb1e8db
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/750bba6ce9bb0b11d6a166031c9728ae3f21765e
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c067aa7b231e91a18a1b3666201ab14dfb00347a

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/sw/rxe/rxe_req.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "69d3ccf6543f24c452a020c8028ca6f46cb1e8db",
              "status": "affected",
              "version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
              "versionType": "git"
            },
            {
              "lessThan": "750bba6ce9bb0b11d6a166031c9728ae3f21765e",
              "status": "affected",
              "version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
              "versionType": "git"
            },
            {
              "lessThan": "c067aa7b231e91a18a1b3666201ab14dfb00347a",
              "status": "affected",
              "version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
              "versionType": "git"
            },
            {
              "lessThan": "13cb7160e5b791f5e3ecf9311cf32849fe7e9b62",
              "status": "affected",
              "version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
              "versionType": "git"
            },
            {
              "lessThan": "5ec111ddc1f727c1e4580aea459842ae5a8359a5",
              "status": "affected",
              "version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
              "versionType": "git"
            },
            {
              "lessThan": "126c757e4cd46f866ddc283143b58eb4d9bf52cd",
              "status": "affected",
              "version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/sw/rxe/rxe_req.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.8"
            },
            {
              "lessThan": "4.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "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/rxe: Validate num_sge/cur_sge before indexing wqe-\u003edma.sge[]\n\nFor a user QP, qp-\u003esq.queue is a ring the application writes directly,\nso rxe_post_send() takes the is_user branch and only schedules send_task\nwithout validating the WQE. rxe_requester() consumes it in place via\nreq_next_wqe() and calls copy_data(), which indexes\n\u0026wqe-\u003edma.sge[cur_sge] with the attacker-controlled num_sge/cur_sge.\nOnly the kernel path bounds num_sge (validate_send_wr()); the user WQE\nis never checked, so a local unprivileged user can post a WQE with an\nout-of-range cur_sge or oversized num_sge and force an out-of-bounds\nread of the per-WQE sge array in copy_data() (vmalloc OOB read, local\nDoS).\n\nBound num_sge to qp-\u003esq.max_sge in rxe_requester() before use, the way\nget_srq_wqe() already guards SRQ entries, and bound cur_sge only when\nthe WQE carries payload (dma.resid): copy_data() returns early on a\nzero-length copy before touching dma-\u003esge[], so a zero-payload WQE --\nthe only kind a max_sge == 0 QP can post -- stays valid.\n\nReproduced under KASAN; the vmalloc-out-of-bounds in copy_data() is gone."
    }
  ],
  "id": "CVE-2026-92525",
  "lastModified": "2026-09-17T17:17:55.540",
  "metrics": {},
  "published": "2026-09-17T17:17:55.540",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/126c757e4cd46f866ddc283143b58eb4d9bf52cd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/13cb7160e5b791f5e3ecf9311cf32849fe7e9b62"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5ec111ddc1f727c1e4580aea459842ae5a8359a5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/69d3ccf6543f24c452a020c8028ca6f46cb1e8db"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/750bba6ce9bb0b11d6a166031c9728ae3f21765e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c067aa7b231e91a18a1b3666201ab14dfb00347a"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-XQGC-MF52-QVG8

Vulnerability from github – Published: 2026-09-17 18:32 – Updated: 2026-09-17 18:32

Details

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

RDMA/rxe: Validate num_sge/cur_sge before indexing wqe->dma.sge[]

For a user QP, qp->sq.queue is a ring the application writes directly, so rxe_post_send() takes the is_user branch and only schedules send_task without validating the WQE. rxe_requester() consumes it in place via req_next_wqe() and calls copy_data(), which indexes &wqe->dma.sge[cur_sge] with the attacker-controlled num_sge/cur_sge. Only the kernel path bounds num_sge (validate_send_wr()); the user WQE is never checked, so a local unprivileged user can post a WQE with an out-of-range cur_sge or oversized num_sge and force an out-of-bounds read of the per-WQE sge array in copy_data() (vmalloc OOB read, local DoS).

Bound num_sge to qp->sq.max_sge in rxe_requester() before use, the way get_srq_wqe() already guards SRQ entries, and bound cur_sge only when the WQE carries payload (dma.resid): copy_data() returns early on a zero-length copy before touching dma->sge[], so a zero-payload WQE -- the only kind a max_sge == 0 QP can post -- stays valid.

Reproduced under KASAN; the vmalloc-out-of-bounds in copy_data() is gone.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-92525"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-17T17:17:55Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Validate num_sge/cur_sge before indexing wqe-\u003edma.sge[]\n\nFor a user QP, qp-\u003esq.queue is a ring the application writes directly,\nso rxe_post_send() takes the is_user branch and only schedules send_task\nwithout validating the WQE. rxe_requester() consumes it in place via\nreq_next_wqe() and calls copy_data(), which indexes\n\u0026wqe-\u003edma.sge[cur_sge] with the attacker-controlled num_sge/cur_sge.\nOnly the kernel path bounds num_sge (validate_send_wr()); the user WQE\nis never checked, so a local unprivileged user can post a WQE with an\nout-of-range cur_sge or oversized num_sge and force an out-of-bounds\nread of the per-WQE sge array in copy_data() (vmalloc OOB read, local\nDoS).\n\nBound num_sge to qp-\u003esq.max_sge in rxe_requester() before use, the way\nget_srq_wqe() already guards SRQ entries, and bound cur_sge only when\nthe WQE carries payload (dma.resid): copy_data() returns early on a\nzero-length copy before touching dma-\u003esge[], so a zero-payload WQE --\nthe only kind a max_sge == 0 QP can post -- stays valid.\n\nReproduced under KASAN; the vmalloc-out-of-bounds in copy_data() is gone.",
  "id": "GHSA-xqgc-mf52-qvg8",
  "modified": "2026-09-17T18:32:07Z",
  "published": "2026-09-17T18:32:07Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-92525"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/126c757e4cd46f866ddc283143b58eb4d9bf52cd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/13cb7160e5b791f5e3ecf9311cf32849fe7e9b62"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5ec111ddc1f727c1e4580aea459842ae5a8359a5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/69d3ccf6543f24c452a020c8028ca6f46cb1e8db"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/750bba6ce9bb0b11d6a166031c9728ae3f21765e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c067aa7b231e91a18a1b3666201ab14dfb00347a"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

Sightings

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Nomenclature

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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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Action not permitted

CVE-2026-92525 (GCVE-0-2026-92525)

FKIE_CVE-2026-92525

GHSA-XQGC-MF52-QVG8

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