net_sched: Flush gso_skb list too during ->change()

{
  "id": "48242e4f03e10fd62d781a29c8b46be3641bdfac94f80996ebbf6d368af4842e",
  "url": "https://osv.dev/vulnerability/CVE-2025-37992",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net_sched: Flush gso_skb list too during ->change()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net_sched: Flush gso_skb list too during ->change() Previously, when reducing a qdisc's limit via the ->change() operation, only the main skb queue was trimmed, potentially leaving packets in the gso_skb list. This could result in NULL pointer dereference when we only check sch->limit against sch->q.qlen. This patch introduces a new helper, qdisc_dequeue_internal(), which ensures both the gso_skb list and the main queue are properly flushed when trimming excess packets. All relevant qdiscs (codel, fq, fq_codel, fq_pie, hhf, pie) are updated to use this helper in their ->change() routines.",
    "evidence": "osv:CVE-2025-37992",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.238",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.184",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.140",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.92",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.30",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.14.8",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-37992",
      "aliases": [
        "CVE-2025-37992"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "76e3cc126bb223013a6b9a0e2a51238d1ef2e409"
                },
                {
                  "fixed": "ea1132ccb112f51ba749c56a912f67970c2cd542"
                },
                {
                  "fixed": "d3336f746f196c6a53e0480923ae93939f047b6c"
                },
                {
                  "fixed": "d38939ebe0d992d581acb6885c1723fa83c1fb2c"
                },
                {
                  "fixed": "a7d6e0ac0a8861f6b1027488062251a8e28150fd"
                },
                {
                  "fixed": "d1365ca80b012d8a7863e45949e413fb61fa4861"
                },
                {
                  "fixed": "fe88c7e4fc2c1cd75a278a15ffbf1689efad4e76"
                },
                {
                  "fixed": "2d3cbfd6d54a2c39ce3244f33f85c595844bd7b8"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37992.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "3.5.0"
                },
                {
                  "fixed": "5.10.238"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.184"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.140"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.92"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.30"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.14.8"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37992.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:33.512135998Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2d3cbfd6d54a2c39ce3244f33f85c595844bd7b8",
        "https://git.kernel.org/stable/c/a7d6e0ac0a8861f6b1027488062251a8e28150fd",
        "https://git.kernel.org/stable/c/d1365ca80b012d8a7863e45949e413fb61fa4861",
        "https://git.kernel.org/stable/c/d3336f746f196c6a53e0480923ae93939f047b6c",
        "https://git.kernel.org/stable/c/d38939ebe0d992d581acb6885c1723fa83c1fb2c",
        "https://git.kernel.org/stable/c/ea1132ccb112f51ba749c56a912f67970c2cd542",
        "https://git.kernel.org/stable/c/fe88c7e4fc2c1cd75a278a15ffbf1689efad4e76",
        "https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html",
        "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37992.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-37992",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37992.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-37992",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 500256,
  "published_at": "2025-05-26T14:54:15.796+00:00"
}