Vulnerability-Lookup

CVE-2026-31440 (GCVE-0-2026-31440)

Vulnerability from cvelistv5 – Published: 2026-04-22 13:53 – Updated: 2026-04-22 13:53

Title

dmaengine: idxd: Fix leaking event log memory

Summary

In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Fix leaking event log memory During the device remove process, the device is reset, causing the configuration registers to go back to their default state, which is zero. As the driver is checking if the event log support was enabled before deallocating, it will fail if a reset happened before. Do not check if the support was enabled, the check for 'idxd->evl' being valid (only allocated if the HW capability is available) is enough.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/d94f9b0ba28a205ca…
	https://git.kernel.org/stable/c/facd0012708e942fc…
	https://git.kernel.org/stable/c/9dfa00967e6ef43a9…
	https://git.kernel.org/stable/c/ee66bc29578391c9b…

Impacted products

Vendor

Product

Version

Linux

Affected: 244da66cda359227d80ccb41dbcb99da40eae186 , < d94f9b0ba28a205caf95902ee88b42bdb8af83d0 (git)
Affected: 244da66cda359227d80ccb41dbcb99da40eae186 , < facd0012708e942fc12890708738aebde497564e (git)
Affected: 244da66cda359227d80ccb41dbcb99da40eae186 , < 9dfa00967e6ef43a9dd0887fe5c3a721a39da92e (git)
Affected: 244da66cda359227d80ccb41dbcb99da40eae186 , < ee66bc29578391c9b48523dc9119af67bd5c7c0f (git)

Linux

Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 6.12.80 , ≤ 6.12.* (semver)
Unaffected: 6.18.21 , ≤ 6.18.* (semver)
Unaffected: 6.19.11 , ≤ 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": [
            "drivers/dma/idxd/device.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d94f9b0ba28a205caf95902ee88b42bdb8af83d0",
              "status": "affected",
              "version": "244da66cda359227d80ccb41dbcb99da40eae186",
              "versionType": "git"
            },
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              "lessThan": "facd0012708e942fc12890708738aebde497564e",
              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/dma/idxd/device.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "lessThan": "6.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.80",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.21",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.80",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.21",
                  "versionStartIncluding": "6.4",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.11",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: idxd: Fix leaking event log memory\n\nDuring the device remove process, the device is reset, causing the\nconfiguration registers to go back to their default state, which is\nzero. As the driver is checking if the event log support was enabled\nbefore deallocating, it will fail if a reset happened before.\n\nDo not check if the support was enabled, the check for \u0027idxd-\u003eevl\u0027\nbeing valid (only allocated if the HW capability is available) is\nenough."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-22T13:53:38.388Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d94f9b0ba28a205caf95902ee88b42bdb8af83d0"
        },
        {
          "url": "https://git.kernel.org/stable/c/facd0012708e942fc12890708738aebde497564e"
        },
        {
          "url": "https://git.kernel.org/stable/c/9dfa00967e6ef43a9dd0887fe5c3a721a39da92e"
        },
        {
          "url": "https://git.kernel.org/stable/c/ee66bc29578391c9b48523dc9119af67bd5c7c0f"
        }
      ],
      "title": "dmaengine: idxd: Fix leaking event log memory",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31440",
    "datePublished": "2026-04-22T13:53:38.388Z",
    "dateReserved": "2026-03-09T15:48:24.090Z",
    "dateUpdated": "2026-04-22T13:53:38.388Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-31440",
      "date": "2026-04-23",
      "epss": "0.00018",
      "percentile": "0.04581"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-31440\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-04-22T14:16:37.390\",\"lastModified\":\"2026-04-23T16:17:41.280\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndmaengine: idxd: Fix leaking event log memory\\n\\nDuring the device remove process, the device is reset, causing the\\nconfiguration registers to go back to their default state, which is\\nzero. As the driver is checking if the event log support was enabled\\nbefore deallocating, it will fail if a reset happened before.\\n\\nDo not check if the support was enabled, the check for \u0027idxd-\u003eevl\u0027\\nbeing valid (only allocated if the HW capability is available) is\\nenough.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/9dfa00967e6ef43a9dd0887fe5c3a721a39da92e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d94f9b0ba28a205caf95902ee88b42bdb8af83d0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ee66bc29578391c9b48523dc9119af67bd5c7c0f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/facd0012708e942fc12890708738aebde497564e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

FKIE_CVE-2026-31440

Vulnerability from fkie_nvd - Published: 2026-04-22 14:16 - Updated: 2026-04-23 16:17

Severity ?

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9dfa00967e6ef43a9dd0887fe5c3a721a39da92e
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d94f9b0ba28a205caf95902ee88b42bdb8af83d0
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ee66bc29578391c9b48523dc9119af67bd5c7c0f
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/facd0012708e942fc12890708738aebde497564e

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: idxd: Fix leaking event log memory\n\nDuring the device remove process, the device is reset, causing the\nconfiguration registers to go back to their default state, which is\nzero. As the driver is checking if the event log support was enabled\nbefore deallocating, it will fail if a reset happened before.\n\nDo not check if the support was enabled, the check for \u0027idxd-\u003eevl\u0027\nbeing valid (only allocated if the HW capability is available) is\nenough."
    }
  ],
  "id": "CVE-2026-31440",
  "lastModified": "2026-04-23T16:17:41.280",
  "metrics": {},
  "published": "2026-04-22T14:16:37.390",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9dfa00967e6ef43a9dd0887fe5c3a721a39da92e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d94f9b0ba28a205caf95902ee88b42bdb8af83d0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ee66bc29578391c9b48523dc9119af67bd5c7c0f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/facd0012708e942fc12890708738aebde497564e"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}

MSRC_CVE-2026-31440

Vulnerability from csaf_microsoft - Published: 2026-04-02 00:00 - Updated: 2026-04-23 01:05

Summary

dmaengine: idxd: Fix leaking event log memory

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-2026-31440

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-2026-31440 dmaengine: idxd: Fix leaking event log memory - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-31440.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": "dmaengine: idxd: Fix leaking event log memory",
    "tracking": {
      "current_release_date": "2026-04-23T01:05:47.000Z",
      "generator": {
        "date": "2026-04-23T07:22:58.463Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-31440",
      "initial_release_date": "2026-04-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-04-23T01:05:47.000Z",
          "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-2026-31440",
      "notes": [
        {
          "category": "general",
          "text": "Linux",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "under_investigation": [
          "17084-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-31440 dmaengine: idxd: Fix leaking event log memory - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-31440.json"
        }
      ],
      "title": "dmaengine: idxd: Fix leaking event log memory"
    }
  ]
}

GHSA-W853-9VQG-WX8H

Vulnerability from github – Published: 2026-04-22 15:31 – Updated: 2026-04-22 15:31

Details

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

dmaengine: idxd: Fix leaking event log memory

During the device remove process, the device is reset, causing the configuration registers to go back to their default state, which is zero. As the driver is checking if the event log support was enabled before deallocating, it will fail if a reset happened before.

Do not check if the support was enabled, the check for 'idxd->evl' being valid (only allocated if the HW capability is available) is enough.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-31440"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-22T14:16:37Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: idxd: Fix leaking event log memory\n\nDuring the device remove process, the device is reset, causing the\nconfiguration registers to go back to their default state, which is\nzero. As the driver is checking if the event log support was enabled\nbefore deallocating, it will fail if a reset happened before.\n\nDo not check if the support was enabled, the check for \u0027idxd-\u003eevl\u0027\nbeing valid (only allocated if the HW capability is available) is\nenough.",
  "id": "GHSA-w853-9vqg-wx8h",
  "modified": "2026-04-22T15:31:40Z",
  "published": "2026-04-22T15:31:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31440"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9dfa00967e6ef43a9dd0887fe5c3a721a39da92e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d94f9b0ba28a205caf95902ee88b42bdb8af83d0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ee66bc29578391c9b48523dc9119af67bd5c7c0f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/facd0012708e942fc12890708738aebde497564e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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-2026-31440 (GCVE-0-2026-31440)

FKIE_CVE-2026-31440

MSRC_CVE-2026-31440

GHSA-W853-9VQG-WX8H

Tags

Sightings

Nomenclature