CVE-2025-39870 (GCVE-0-2025-39870)

Vulnerability from cvelistv5 – Published: 2025-09-23 06:00 – Updated: 2026-05-23 16:00
VLAI
Title
dmaengine: idxd: Fix double free in idxd_setup_wqs()
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d584acdf54f409cb7eae1359ae6c12aaabedeed8 , < 25e6146c2812487a88f619d5ff6efbdcd5b2bc31 (git)
Affected: 47846211998a9ffb0fcc08092eb95ac783d2b11a , < df82c7901513fd0fc738052a8e6a330d92cc8ec9 (git)
Affected: 5fcd392dae6d6aba7dc64ffdbb838ff191315da3 , < ec5430d090d0b6ace8fefa290fc37e88930017d2 (git)
Affected: 3fd2f4bc010cdfbc07dd21018dc65bd9370eb7a4 , < 9f0e225635475b2285b966271d5e82cba74295b1 (git)
Affected: 3fd2f4bc010cdfbc07dd21018dc65bd9370eb7a4 , < 39aaa337449e71a41d4813be0226a722827ba606 (git)
Affected: ed2c66000aa64c0d2621864831f0d04c820a1441 (git)
Affected: 6.1.140 , < 6.1.153 (semver)
Affected: 6.6.92 , < 6.6.107 (semver)
Affected: 6.12.30 , < 6.12.48 (semver)
Affected: 6.14.8 , < 6.15 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.1.153 , ≤ 6.1.* (semver)
Unaffected: 6.6.107 , ≤ 6.6.* (semver)
Unaffected: 6.12.48 , ≤ 6.12.* (semver)
Unaffected: 6.16.8 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "url": "https://git.kernel.org/stable/c/df82c7901513fd0fc738052a8e6a330d92cc8ec9"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/ec5430d090d0b6ace8fefa290fc37e88930017d2"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-415"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:18:19+00:00",
      "cve": "CVE-2025-39870",
      "id": "CVE-2025-39870",
      "initial_release_date": "2025-09-23T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: dmaengine: idxd: Fix double free in idxd_setup_wqs()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-39870.json",
      "version": "3"
    }
  }
}



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Sightings

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