CVE-2026-31440 (GCVE-0-2026-31440)
Vulnerability from cvelistv5
Published
2026-04-22 13:53
Modified
2026-05-17 15:21
Severity ?
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 244da66cda359227d80ccb41dbcb99da40eae186
Version: 244da66cda359227d80ccb41dbcb99da40eae186
Version: 244da66cda359227d80ccb41dbcb99da40eae186
Version: 244da66cda359227d80ccb41dbcb99da40eae186
Version: 244da66cda359227d80ccb41dbcb99da40eae186
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{
  "containers": {
    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/dma/idxd/device.c"
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          "vendor": "Linux",
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              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
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              "negate": false,
              "operator": "OR"
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      ],
      "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": "2026-05-17T15:21:26.990Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/695b491dc3f20365fd5821f22e25dbe3c1c20cbc"
        },
        {
          "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": {
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      }
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  },
  "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": "2026-05-17T15:21:26.990Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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