Vulnerability-Lookup

FKIE_CVE-2026-97413

Vulnerability from fkie_nvd - Published: 2026-09-24 17:17 - Updated: 2026-09-25 05:17

Severity

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

Summary

In the Linux kernel, the following vulnerability has been resolved: RDMA/rtrs-srv: Fix integer underflow in process_read and process_write usr_len is read from a network-supplied message field (le16_to_cpu) and used to compute data_len = off - usr_len without validating that usr_len <= off. A malicious RDMA client can send usr_len > off causing an integer underflow, resulting in data_len wrapping to a huge size_t value which is then passed to the rdma_ev callback as a memory length, leading to out-of-bounds memory access. Fix by reading and validating usr_len <= off before rtrs_srv_get_ops_ids() in both process_read() and process_write(), ensuring the early return path acquires no reference and has no resource leak.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/24ad03bfeda05fca04c56677e57fd3d6bc3e9978
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/54bf38b27afc08a0eb6b732f9c14eb8a4bcb66b5
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c76e9123ab91a903396d26e6ab1b5caae5c6b149

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/ulp/rtrs/rtrs-srv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "24ad03bfeda05fca04c56677e57fd3d6bc3e9978",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "c76e9123ab91a903396d26e6ab1b5caae5c6b149",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "54bf38b27afc08a0eb6b732f9c14eb8a4bcb66b5",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "6.12.111",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "6.18.53",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/ulp/rtrs/rtrs-srv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "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/rtrs-srv: Fix integer underflow in process_read and process_write\n\nusr_len is read from a network-supplied message field (le16_to_cpu)\nand used to compute data_len = off - usr_len without validating that\nusr_len \u003c= off. A malicious RDMA client can send usr_len \u003e off causing\nan integer underflow, resulting in data_len wrapping to a huge size_t\nvalue which is then passed to the rdma_ev callback as a memory length,\nleading to out-of-bounds memory access.\n\nFix by reading and validating usr_len \u003c= off before rtrs_srv_get_ops_ids()\nin both process_read() and process_write(), ensuring the early return\npath acquires no reference and has no resource leak."
    }
  ],
  "id": "CVE-2026-97413",
  "lastModified": "2026-09-25T05:17:04.603",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-09-24T17:17:18.990",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/24ad03bfeda05fca04c56677e57fd3d6bc3e9978"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/54bf38b27afc08a0eb6b732f9c14eb8a4bcb66b5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c76e9123ab91a903396d26e6ab1b5caae5c6b149"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-97413 (GCVE-0-2026-97413)

Vulnerability from cvelistv5 – Published: 2026-09-24 16:03 – Updated: 2026-09-25 05:10

Title

RDMA/rtrs-srv: Fix integer underflow in process_read and process_write

Summary

Severity

9.8 (Critical)


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

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/24ad03bfeda05fca0…
https://git.kernel.org/stable/c/c76e9123ab91a9033…
https://git.kernel.org/stable/c/54bf38b27afc08a0e…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 24ad03bfeda05fca04c56677e57fd3d6bc3e9978 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c76e9123ab91a903396d26e6ab1b5caae5c6b149 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 54bf38b27afc08a0eb6b732f9c14eb8a4bcb66b5 (git) Affected: 0 , < 6.12.111 (semver) Affected: 0 , < 6.18.53 (semver)
Linux	Linux	Unaffected: 6.12.111 , ≤ 6.12.* (semver) Unaffected: 6.18.53 , ≤ 6.18.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/ulp/rtrs/rtrs-srv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "24ad03bfeda05fca04c56677e57fd3d6bc3e9978",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "c76e9123ab91a903396d26e6ab1b5caae5c6b149",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "54bf38b27afc08a0eb6b732f9c14eb8a4bcb66b5",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "6.12.111",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "6.18.53",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/ulp/rtrs/rtrs-srv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.111",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rtrs-srv: Fix integer underflow in process_read and process_write\n\nusr_len is read from a network-supplied message field (le16_to_cpu)\nand used to compute data_len = off - usr_len without validating that\nusr_len \u003c= off. A malicious RDMA client can send usr_len \u003e off causing\nan integer underflow, resulting in data_len wrapping to a huge size_t\nvalue which is then passed to the rdma_ev callback as a memory length,\nleading to out-of-bounds memory access.\n\nFix by reading and validating usr_len \u003c= off before rtrs_srv_get_ops_ids()\nin both process_read() and process_write(), ensuring the early return\npath acquires no reference and has no resource leak."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - A remote peer RDMA-WRITE-WITH-IMM\u0027s a RTRS_MSG_READ or RTRS_MSG_WRITE carrying attacker-controlled usr_len; rtrs_srv_rdma_done() hands that buffer to process_io_req() then process_read()/process_write(). rtrs_srv_cm_init() listens with RDMA_PS_TCP on IPv6 port 1234 (RoCEv2/iWARP), which is IP-routable.\nAC:L - The peer sets le16 usr_len in the RTRS_MSG_READ/WRITE at chunk+off and the IMM payload that rtrs_srv_rdma_done() splits into msg_id and off. Choosing usr_len \u003e off makes size_t data_len = off - usr_len wrap on every call; there is no race and no victim-held state.\nPR:N - rtrs_rdma_connect() admits the RDMA_CM CONNECT_REQUEST after checking only RTRS_MAGIC, protocol major version, and cid/uuid; process_info_req() then publishes chunk rkeys and moves to RTRS_SRV_CONNECTED with no credentials, so process_read()/process_write() run unauthenticated.\nUI:N - The attacker posts the RDMA-WRITE-WITH-IMM that rtrs_srv_rdma_done() delivers to process_read()/process_write(); no local user must mount a volume, open a file, or otherwise interact.\nS:U - process_read()/process_write() invoke rnbd_srv_rdma_ev() in the same host kernel that owns the chunk pages; the OOB access stays inside that kernel and does not escape a VM, guest, or IOMMU domain.\nC:H - Underflowed data_len makes usr = page_address(chunk)+off-usr_len point before the chunk. rnbd_srv_rdma_ev() reads the RNBD header there; a sprayed RNBD_MSG_OPEN does unbounded strlen(dev_name), and process_rdma() bio_add_virt_nofail()s a ~4GiB WRITE bvec that copies following linear-map pages onto a device the peer can read back.\nI:H - process_rdma() truncates the wrapped size_t to u32 and bio_add_virt_nofail() installs a ~4GiB bvec from the chunk page; submit_bio() of an RNBD_OP_READ therefore writes device data through that bvec into subsequent kernel linear-map pages, an out-of-bounds kernel write.\nA:H - rnbd_srv_rdma_ev() immediately loads hdr-\u003etype from the wrapped usr pointer, process_msg_open() strlen()s that OOB name, and the ~4GiB bio_add_virt_nofail() bvec walks into holes or MMIO in the linear map; any of those oops/panic the completion path and can be repeated at will."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-25T05:10:26.459Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/24ad03bfeda05fca04c56677e57fd3d6bc3e9978"
        },
        {
          "url": "https://git.kernel.org/stable/c/c76e9123ab91a903396d26e6ab1b5caae5c6b149"
        },
        {
          "url": "https://git.kernel.org/stable/c/54bf38b27afc08a0eb6b732f9c14eb8a4bcb66b5"
        }
      ],
      "title": "RDMA/rtrs-srv: Fix integer underflow in process_read and process_write",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97413",
    "datePublished": "2026-09-24T16:03:21.010Z",
    "dateReserved": "2026-09-24T14:53:16.867Z",
    "dateUpdated": "2026-09-25T05:10:26.459Z",
    "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.
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.

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-2026-97413

CVE-2026-97413 (GCVE-0-2026-97413)

Tags

Sightings

Nomenclature

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