CVE-2025-39870 (GCVE-0-2025-39870)
Vulnerability from cvelistv5
Published
2025-09-23 06:00
Modified
2025-09-29 06:01
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Fix double free in idxd_setup_wqs() The clean up in idxd_setup_wqs() has had a couple bugs because the error handling is a bit subtle. It's simpler to just re-write it in a cleaner way. The issues here are: 1) If "idxd->max_wqs" is <= 0 then we call put_device(conf_dev) when "conf_dev" hasn't been initialized. 2) If kzalloc_node() fails then again "conf_dev" is invalid. It's either uninitialized or it points to the "conf_dev" from the previous iteration so it leads to a double free. It's better to free partial loop iterations within the loop and then the unwinding at the end can handle whole loop iterations. I also renamed the labels to describe what the goto does and not where the goto was located.
References
Impacted products
Vendor Product Version
Linux Linux Version: d584acdf54f409cb7eae1359ae6c12aaabedeed8
Version: 47846211998a9ffb0fcc08092eb95ac783d2b11a
Version: 5fcd392dae6d6aba7dc64ffdbb838ff191315da3
Version: 3fd2f4bc010cdfbc07dd21018dc65bd9370eb7a4
Version: 3fd2f4bc010cdfbc07dd21018dc65bd9370eb7a4
Version: ed2c66000aa64c0d2621864831f0d04c820a1441
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/dma/idxd/init.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "25e6146c2812487a88f619d5ff6efbdcd5b2bc31",
              "status": "affected",
              "version": "d584acdf54f409cb7eae1359ae6c12aaabedeed8",
              "versionType": "git"
            },
            {
              "lessThan": "df82c7901513fd0fc738052a8e6a330d92cc8ec9",
              "status": "affected",
              "version": "47846211998a9ffb0fcc08092eb95ac783d2b11a",
              "versionType": "git"
            },
            {
              "lessThan": "ec5430d090d0b6ace8fefa290fc37e88930017d2",
              "status": "affected",
              "version": "5fcd392dae6d6aba7dc64ffdbb838ff191315da3",
              "versionType": "git"
            },
            {
              "lessThan": "9f0e225635475b2285b966271d5e82cba74295b1",
              "status": "affected",
              "version": "3fd2f4bc010cdfbc07dd21018dc65bd9370eb7a4",
              "versionType": "git"
            },
            {
              "lessThan": "39aaa337449e71a41d4813be0226a722827ba606",
              "status": "affected",
              "version": "3fd2f4bc010cdfbc07dd21018dc65bd9370eb7a4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ed2c66000aa64c0d2621864831f0d04c820a1441",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/dma/idxd/init.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "lessThan": "6.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.153",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.107",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.48",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.153",
                  "versionStartIncluding": "6.1.140",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.107",
                  "versionStartIncluding": "6.6.92",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.48",
                  "versionStartIncluding": "6.12.30",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16.8",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.14.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: idxd: Fix double free in idxd_setup_wqs()\n\nThe clean up in idxd_setup_wqs() has had a couple bugs because the error\nhandling is a bit subtle.  It\u0027s simpler to just re-write it in a cleaner\nway.  The issues here are:\n\n1) If \"idxd-\u003emax_wqs\" is \u003c= 0 then we call put_device(conf_dev) when\n   \"conf_dev\" hasn\u0027t been initialized.\n2) If kzalloc_node() fails then again \"conf_dev\" is invalid.  It\u0027s\n   either uninitialized or it points to the \"conf_dev\" from the\n   previous iteration so it leads to a double free.\n\nIt\u0027s better to free partial loop iterations within the loop and then\nthe unwinding at the end can handle whole loop iterations.  I also\nrenamed the labels to describe what the goto does and not where the goto\nwas located."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-29T06:01:26.463Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/25e6146c2812487a88f619d5ff6efbdcd5b2bc31"
        },
        {
          "url": "https://git.kernel.org/stable/c/df82c7901513fd0fc738052a8e6a330d92cc8ec9"
        },
        {
          "url": "https://git.kernel.org/stable/c/ec5430d090d0b6ace8fefa290fc37e88930017d2"
        },
        {
          "url": "https://git.kernel.org/stable/c/9f0e225635475b2285b966271d5e82cba74295b1"
        },
        {
          "url": "https://git.kernel.org/stable/c/39aaa337449e71a41d4813be0226a722827ba606"
        }
      ],
      "title": "dmaengine: idxd: Fix double free in idxd_setup_wqs()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39870",
    "datePublished": "2025-09-23T06:00:44.369Z",
    "dateReserved": "2025-04-16T07:20:57.143Z",
    "dateUpdated": "2025-09-29T06:01:26.463Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-39870\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-23T06:15:46.240\",\"lastModified\":\"2025-09-24T18:11:24.520\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndmaengine: idxd: Fix double free in idxd_setup_wqs()\\n\\nThe clean up in idxd_setup_wqs() has had a couple bugs because the error\\nhandling is a bit subtle.  It\u0027s simpler to just re-write it in a cleaner\\nway.  The issues here are:\\n\\n1) If \\\"idxd-\u003emax_wqs\\\" is \u003c= 0 then we call put_device(conf_dev) when\\n   \\\"conf_dev\\\" hasn\u0027t been initialized.\\n2) If kzalloc_node() fails then again \\\"conf_dev\\\" is invalid.  It\u0027s\\n   either uninitialized or it points to the \\\"conf_dev\\\" from the\\n   previous iteration so it leads to a double free.\\n\\nIt\u0027s better to free partial loop iterations within the loop and then\\nthe unwinding at the end can handle whole loop iterations.  I also\\nrenamed the labels to describe what the goto does and not where the goto\\nwas located.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/25e6146c2812487a88f619d5ff6efbdcd5b2bc31\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/39aaa337449e71a41d4813be0226a722827ba606\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9f0e225635475b2285b966271d5e82cba74295b1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/df82c7901513fd0fc738052a8e6a330d92cc8ec9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ec5430d090d0b6ace8fefa290fc37e88930017d2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.