Vulnerability-Lookup

CVE-2026-31536 (GCVE-0-2026-31536)

Vulnerability from cvelistv5 – Published: 2026-04-24 14:30 – Updated: 2026-04-25 05:48

Title

smb: server: let send_done handle a completion without IB_SEND_SIGNALED

Summary

In the Linux kernel, the following vulnerability has been resolved: smb: server: let send_done handle a completion without IB_SEND_SIGNALED With smbdirect_send_batch processing we likely have requests without IB_SEND_SIGNALED, which will be destroyed in the final request that has IB_SEND_SIGNALED set. If the connection is broken all requests are signaled even without explicit IB_SEND_SIGNALED.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/24082642654f3e514…
	https://git.kernel.org/stable/c/e38b415c024bc3b63…
	https://git.kernel.org/stable/c/9da82dc73cb03e85d…

Impacted products

Vendor

Product

Version

Linux

Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 24082642654f3e5149913946e89c00a297a8868f (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < e38b415c024bc3b6321bf8650dbf3f4aab8e74b3 (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 9da82dc73cb03e85d716a2609364572367a5ff47 (git)

Linux

Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 6.18.11 , ≤ 6.18.* (semver)
Unaffected: 6.19.1 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/transport_rdma.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "24082642654f3e5149913946e89c00a297a8868f",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            },
            {
              "lessThan": "e38b415c024bc3b6321bf8650dbf3f4aab8e74b3",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            },
            {
              "lessThan": "9da82dc73cb03e85d716a2609364572367a5ff47",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/transport_rdma.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.11",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.1",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: server: let send_done handle a completion without IB_SEND_SIGNALED\n\nWith smbdirect_send_batch processing we likely have requests without\nIB_SEND_SIGNALED, which will be destroyed in the final request\nthat has IB_SEND_SIGNALED set.\n\nIf the connection is broken all requests are signaled\neven without explicit IB_SEND_SIGNALED."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-25T05:48:10.007Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/24082642654f3e5149913946e89c00a297a8868f"
        },
        {
          "url": "https://git.kernel.org/stable/c/e38b415c024bc3b6321bf8650dbf3f4aab8e74b3"
        },
        {
          "url": "https://git.kernel.org/stable/c/9da82dc73cb03e85d716a2609364572367a5ff47"
        }
      ],
      "title": "smb: server: let send_done handle a completion without IB_SEND_SIGNALED",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31536",
    "datePublished": "2026-04-24T14:30:24.224Z",
    "dateReserved": "2026-03-09T15:48:24.113Z",
    "dateUpdated": "2026-04-25T05:48:10.007Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-31536",
      "date": "2026-04-26",
      "epss": "0.00017",
      "percentile": "0.0407"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-31536\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-04-24T15:16:27.530\",\"lastModified\":\"2026-04-24T17:51:40.810\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsmb: server: let send_done handle a completion without IB_SEND_SIGNALED\\n\\nWith smbdirect_send_batch processing we likely have requests without\\nIB_SEND_SIGNALED, which will be destroyed in the final request\\nthat has IB_SEND_SIGNALED set.\\n\\nIf the connection is broken all requests are signaled\\neven without explicit IB_SEND_SIGNALED.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/24082642654f3e5149913946e89c00a297a8868f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9da82dc73cb03e85d716a2609364572367a5ff47\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e38b415c024bc3b6321bf8650dbf3f4aab8e74b3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

GHSA-PGX3-CX3F-6G2V

Vulnerability from github – Published: 2026-04-24 15:32 – Updated: 2026-04-24 15:32

Details

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

smb: server: let send_done handle a completion without IB_SEND_SIGNALED

With smbdirect_send_batch processing we likely have requests without IB_SEND_SIGNALED, which will be destroyed in the final request that has IB_SEND_SIGNALED set.

If the connection is broken all requests are signaled even without explicit IB_SEND_SIGNALED.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-31536"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-24T15:16:27Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: server: let send_done handle a completion without IB_SEND_SIGNALED\n\nWith smbdirect_send_batch processing we likely have requests without\nIB_SEND_SIGNALED, which will be destroyed in the final request\nthat has IB_SEND_SIGNALED set.\n\nIf the connection is broken all requests are signaled\neven without explicit IB_SEND_SIGNALED.",
  "id": "GHSA-pgx3-cx3f-6g2v",
  "modified": "2026-04-24T15:32:33Z",
  "published": "2026-04-24T15:32:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31536"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/24082642654f3e5149913946e89c00a297a8868f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9da82dc73cb03e85d716a2609364572367a5ff47"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e38b415c024bc3b6321bf8650dbf3f4aab8e74b3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

MSRC_CVE-2026-31536

Vulnerability from csaf_microsoft - Published: 2026-04-02 00:00 - Updated: 2026-04-26 01:02

Summary

smb: server: let send_done handle a completion without IB_SEND_SIGNALED

Notes

Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

CVE-2026-31536

References

URL

Category

	https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self
	https://support.microsoft.com/lifecycle	external
	https://www.first.org/cvss	external
	https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self

JSON

To clipboard

{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2026-31536 smb: server: let send_done handle a completion without IB_SEND_SIGNALED - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-31536.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "smb: server: let send_done handle a completion without IB_SEND_SIGNALED",
    "tracking": {
      "current_release_date": "2026-04-26T01:02:31.000Z",
      "generator": {
        "date": "2026-04-26T07:27:57.415Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-31536",
      "initial_release_date": "2026-04-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-04-26T01:02:31.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
                  "product_id": "17084"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-31536",
      "notes": [
        {
          "category": "general",
          "text": "Linux",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "under_investigation": [
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        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-31536 smb: server: let send_done handle a completion without IB_SEND_SIGNALED - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-31536.json"
        }
      ],
      "title": "smb: server: let send_done handle a completion without IB_SEND_SIGNALED"
    }
  ]
}

FKIE_CVE-2026-31536

Vulnerability from fkie_nvd - Published: 2026-04-24 15:16 - Updated: 2026-04-24 17:51

Severity ?

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/24082642654f3e5149913946e89c00a297a8868f
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9da82dc73cb03e85d716a2609364572367a5ff47
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e38b415c024bc3b6321bf8650dbf3f4aab8e74b3

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: server: let send_done handle a completion without IB_SEND_SIGNALED\n\nWith smbdirect_send_batch processing we likely have requests without\nIB_SEND_SIGNALED, which will be destroyed in the final request\nthat has IB_SEND_SIGNALED set.\n\nIf the connection is broken all requests are signaled\neven without explicit IB_SEND_SIGNALED."
    }
  ],
  "id": "CVE-2026-31536",
  "lastModified": "2026-04-24T17:51:40.810",
  "metrics": {},
  "published": "2026-04-24T15:16:27.530",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/24082642654f3e5149913946e89c00a297a8868f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9da82dc73cb03e85d716a2609364572367a5ff47"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e38b415c024bc3b6321bf8650dbf3f4aab8e74b3"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

CVE-2026-31536 (GCVE-0-2026-31536)

GHSA-PGX3-CX3F-6G2V

MSRC_CVE-2026-31536

FKIE_CVE-2026-31536

Tags

Sightings

Nomenclature