GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2026-89531 (GCVE-0-2026-89531)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:44 – Updated: 2026-09-11 19:44
VLAI
Title
svcrdma: Reject connection when transport allocation fails
Summary
In the Linux kernel, the following vulnerability has been resolved: svcrdma: Reject connection when transport allocation fails handle_connect_req() returns without action when svc_rdma_create_xprt() fails to allocate the new transport. The CM core returns 0 for CONNECT_REQUEST events, so it does not destroy the new rdma_cm_id. Each allocation failure under memory pressure leaks one rdma_cm_id, and a remote peer driving connection attempts can amplify this. Reject the connection by returning a non-zero status from the CM event handler, which tells the CM core to destroy the orphaned cm_id.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 377f9b2f4529e0ac702fd7b91e216afd0adc959e , < 6e21754bbf75075f3fee1cebc79f3417364235ec (git)
Affected: 377f9b2f4529e0ac702fd7b91e216afd0adc959e , < 3cf372cec7ab2cd8c6002bf775cc14d90ccb098b (git)
Affected: 377f9b2f4529e0ac702fd7b91e216afd0adc959e , < 1f6a14c142fee4778c32709d1d54595c2e2b7991 (git)
Affected: 377f9b2f4529e0ac702fd7b91e216afd0adc959e , < 0944462247dcb7de7622cdaaadf5f05c52707dab (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.25
Unaffected: 0 , < 2.6.25 (semver)
Unaffected: 6.12.109 , ≤ 6.12.* (semver)
Unaffected: 6.18.50 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sunrpc/xprtrdma/svc_rdma_transport.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6e21754bbf75075f3fee1cebc79f3417364235ec",
              "status": "affected",
              "version": "377f9b2f4529e0ac702fd7b91e216afd0adc959e",
              "versionType": "git"
            },
            {
              "lessThan": "3cf372cec7ab2cd8c6002bf775cc14d90ccb098b",
              "status": "affected",
              "version": "377f9b2f4529e0ac702fd7b91e216afd0adc959e",
              "versionType": "git"
            },
            {
              "lessThan": "1f6a14c142fee4778c32709d1d54595c2e2b7991",
              "status": "affected",
              "version": "377f9b2f4529e0ac702fd7b91e216afd0adc959e",
              "versionType": "git"
            },
            {
              "lessThan": "0944462247dcb7de7622cdaaadf5f05c52707dab",
              "status": "affected",
              "version": "377f9b2f4529e0ac702fd7b91e216afd0adc959e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/sunrpc/xprtrdma/svc_rdma_transport.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.25"
            },
            {
              "lessThan": "2.6.25",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "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": "6.12.109",
                  "versionStartIncluding": "2.6.25",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.50",
                  "versionStartIncluding": "2.6.25",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "2.6.25",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "2.6.25",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsvcrdma: Reject connection when transport allocation fails\n\nhandle_connect_req() returns without action when\nsvc_rdma_create_xprt() fails to allocate the new transport.\nThe CM core returns 0 for CONNECT_REQUEST events, so it does\nnot destroy the new rdma_cm_id. Each allocation failure under\nmemory pressure leaks one rdma_cm_id, and a remote peer driving\nconnection attempts can amplify this.\n\nReject the connection by returning a non-zero status from the\nCM event handler, which tells the CM core to destroy the\norphaned cm_id."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-11T19:44:10.769Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6e21754bbf75075f3fee1cebc79f3417364235ec"
        },
        {
          "url": "https://git.kernel.org/stable/c/3cf372cec7ab2cd8c6002bf775cc14d90ccb098b"
        },
        {
          "url": "https://git.kernel.org/stable/c/1f6a14c142fee4778c32709d1d54595c2e2b7991"
        },
        {
          "url": "https://git.kernel.org/stable/c/0944462247dcb7de7622cdaaadf5f05c52707dab"
        }
      ],
      "title": "svcrdma: Reject connection when transport allocation fails",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89531",
    "datePublished": "2026-09-11T19:44:10.769Z",
    "dateReserved": "2026-09-11T19:38:34.720Z",
    "dateUpdated": "2026-09-11T19:44:10.769Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-89531",
      "date": "2026-09-17",
      "epss": "0.00168",
      "percentile": "0.06444"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-14T15:01:30.000Z",
      "cve": "CVE-2026-89531",
      "id": "msrc_CVE-2026-89531",
      "initial_release_date": "2026-09-13T01:13:43.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "svcrdma: Reject connection when transport allocation fails",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-89531.json",
      "version": "2"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-89531\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-11T20:19:35.987\",\"lastModified\":\"2026-09-11T20:19:35.987\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsvcrdma: Reject connection when transport allocation fails\\n\\nhandle_connect_req() returns without action when\\nsvc_rdma_create_xprt() fails to allocate the new transport.\\nThe CM core returns 0 for CONNECT_REQUEST events, so it does\\nnot destroy the new rdma_cm_id. Each allocation failure under\\nmemory pressure leaks one rdma_cm_id, and a remote peer driving\\nconnection attempts can amplify this.\\n\\nReject the connection by returning a non-zero status from the\\nCM event handler, which tells the CM core to destroy the\\norphaned cm_id.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/sunrpc/xprtrdma/svc_rdma_transport.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"377f9b2f4529e0ac702fd7b91e216afd0adc959e\",\"lessThan\":\"6e21754bbf75075f3fee1cebc79f3417364235ec\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"377f9b2f4529e0ac702fd7b91e216afd0adc959e\",\"lessThan\":\"3cf372cec7ab2cd8c6002bf775cc14d90ccb098b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"377f9b2f4529e0ac702fd7b91e216afd0adc959e\",\"lessThan\":\"1f6a14c142fee4778c32709d1d54595c2e2b7991\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"377f9b2f4529e0ac702fd7b91e216afd0adc959e\",\"lessThan\":\"0944462247dcb7de7622cdaaadf5f05c52707dab\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/sunrpc/xprtrdma/svc_rdma_transport.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.25\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.25\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.109\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.50\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.4\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0944462247dcb7de7622cdaaadf5f05c52707dab\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1f6a14c142fee4778c32709d1d54595c2e2b7991\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3cf372cec7ab2cd8c6002bf775cc14d90ccb098b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6e21754bbf75075f3fee1cebc79f3417364235ec\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-15T05:36:43+00:00",
      "cve": "CVE-2026-89531",
      "id": "CVE-2026-89531",
      "initial_release_date": "2026-09-11T19:44:10.769000+00:00",
      "product_status:known_affected": "2",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel svcrdma: Denial of Service due to resource leak from failed connection attempts",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89531.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Related by attack behaviour

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.