CVE-2025-38083 (GCVE-0-2025-38083)
Vulnerability from cvelistv5
Published
2025-06-20 11:21
Modified
2025-07-28 04:11
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net_sched: prio: fix a race in prio_tune() Gerrard Tai reported a race condition in PRIO, whenever SFQ perturb timer fires at the wrong time. The race is as follows: CPU 0 CPU 1 [1]: lock root [2]: qdisc_tree_flush_backlog() [3]: unlock root | | [5]: lock root | [6]: rehash | [7]: qdisc_tree_reduce_backlog() | [4]: qdisc_put() This can be abused to underflow a parent's qlen. Calling qdisc_purge_queue() instead of qdisc_tree_flush_backlog() should fix the race, because all packets will be purged from the qdisc before releasing the lock.
References
Impacted products
Vendor Product Version
Linux Linux Version: 7b8e0b6e659983154c8d7e756cdb833d89a3d4d7
Version: 7b8e0b6e659983154c8d7e756cdb833d89a3d4d7
Version: 7b8e0b6e659983154c8d7e756cdb833d89a3d4d7
Version: 7b8e0b6e659983154c8d7e756cdb833d89a3d4d7
Version: 7b8e0b6e659983154c8d7e756cdb833d89a3d4d7
Version: 7b8e0b6e659983154c8d7e756cdb833d89a3d4d7
Version: 7b8e0b6e659983154c8d7e756cdb833d89a3d4d7
Version: 7b8e0b6e659983154c8d7e756cdb833d89a3d4d7
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sched/sch_prio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "53d11560e957d53ee87a0653d258038ce12361b7",
              "status": "affected",
              "version": "7b8e0b6e659983154c8d7e756cdb833d89a3d4d7",
              "versionType": "git"
            },
            {
              "lessThan": "4483d8b9127591c60c4eb789d6cab953bc4522a9",
              "status": "affected",
              "version": "7b8e0b6e659983154c8d7e756cdb833d89a3d4d7",
              "versionType": "git"
            },
            {
              "lessThan": "20f68e6a9e41693cb0e55e5b9ebbcb40983a4b8f",
              "status": "affected",
              "version": "7b8e0b6e659983154c8d7e756cdb833d89a3d4d7",
              "versionType": "git"
            },
            {
              "lessThan": "3aaa7c01cf19d9b9bb64b88b65c3a6fd05da2eb4",
              "status": "affected",
              "version": "7b8e0b6e659983154c8d7e756cdb833d89a3d4d7",
              "versionType": "git"
            },
            {
              "lessThan": "46c15c9d0f65c9ba857d63f53264f4b17e8a715f",
              "status": "affected",
              "version": "7b8e0b6e659983154c8d7e756cdb833d89a3d4d7",
              "versionType": "git"
            },
            {
              "lessThan": "e3f6745006dc9423d2b065b90f191cfa11b1b584",
              "status": "affected",
              "version": "7b8e0b6e659983154c8d7e756cdb833d89a3d4d7",
              "versionType": "git"
            },
            {
              "lessThan": "93f9eeb678d4c9c1abf720b3615fa8299a490845",
              "status": "affected",
              "version": "7b8e0b6e659983154c8d7e756cdb833d89a3d4d7",
              "versionType": "git"
            },
            {
              "lessThan": "d35acc1be3480505b5931f17e4ea9b7617fea4d3",
              "status": "affected",
              "version": "7b8e0b6e659983154c8d7e756cdb833d89a3d4d7",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/sched/sch_prio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.0"
            },
            {
              "lessThan": "5.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.295",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.239",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.186",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.142",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.94",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.34",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.295",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.239",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.186",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.142",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.94",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.34",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15.3",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: prio: fix a race in prio_tune()\n\nGerrard Tai reported a race condition in PRIO, whenever SFQ perturb timer\nfires at the wrong time.\n\nThe race is as follows:\n\nCPU 0                                 CPU 1\n[1]: lock root\n[2]: qdisc_tree_flush_backlog()\n[3]: unlock root\n |\n |                                    [5]: lock root\n |                                    [6]: rehash\n |                                    [7]: qdisc_tree_reduce_backlog()\n |\n[4]: qdisc_put()\n\nThis can be abused to underflow a parent\u0027s qlen.\n\nCalling qdisc_purge_queue() instead of qdisc_tree_flush_backlog()\nshould fix the race, because all packets will be purged from the qdisc\nbefore releasing the lock."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-28T04:11:55.593Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/53d11560e957d53ee87a0653d258038ce12361b7"
        },
        {
          "url": "https://git.kernel.org/stable/c/4483d8b9127591c60c4eb789d6cab953bc4522a9"
        },
        {
          "url": "https://git.kernel.org/stable/c/20f68e6a9e41693cb0e55e5b9ebbcb40983a4b8f"
        },
        {
          "url": "https://git.kernel.org/stable/c/3aaa7c01cf19d9b9bb64b88b65c3a6fd05da2eb4"
        },
        {
          "url": "https://git.kernel.org/stable/c/46c15c9d0f65c9ba857d63f53264f4b17e8a715f"
        },
        {
          "url": "https://git.kernel.org/stable/c/e3f6745006dc9423d2b065b90f191cfa11b1b584"
        },
        {
          "url": "https://git.kernel.org/stable/c/93f9eeb678d4c9c1abf720b3615fa8299a490845"
        },
        {
          "url": "https://git.kernel.org/stable/c/d35acc1be3480505b5931f17e4ea9b7617fea4d3"
        }
      ],
      "title": "net_sched: prio: fix a race in prio_tune()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38083",
    "datePublished": "2025-06-20T11:21:51.554Z",
    "dateReserved": "2025-04-16T04:51:23.981Z",
    "dateUpdated": "2025-07-28T04:11:55.593Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38083\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-20T12:15:21.470\",\"lastModified\":\"2025-06-27T11:15:25.267\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet_sched: prio: fix a race in prio_tune()\\n\\nGerrard Tai reported a race condition in PRIO, whenever SFQ perturb timer\\nfires at the wrong time.\\n\\nThe race is as follows:\\n\\nCPU 0                                 CPU 1\\n[1]: lock root\\n[2]: qdisc_tree_flush_backlog()\\n[3]: unlock root\\n |\\n |                                    [5]: lock root\\n |                                    [6]: rehash\\n |                                    [7]: qdisc_tree_reduce_backlog()\\n |\\n[4]: qdisc_put()\\n\\nThis can be abused to underflow a parent\u0027s qlen.\\n\\nCalling qdisc_purge_queue() instead of qdisc_tree_flush_backlog()\\nshould fix the race, because all packets will be purged from the qdisc\\nbefore releasing the lock.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net_sched: prio: corrige una ejecuci\u00f3n en prio_tune() Gerrard Tai inform\u00f3 una condici\u00f3n de ejecuci\u00f3n en PRIO, siempre que el temporizador de perturbaci\u00f3n SFQ se dispara en el momento equivocado. La ejecuci\u00f3n es la siguiente: CPU 0 CPU 1 [1]: ra\u00edz de bloqueo [2]: qdisc_tree_flush_backlog() [3]: ra\u00edz de desbloqueo | | [5]: ra\u00edz de bloqueo | [6]: rehash | [7]: qdisc_tree_reduce_backlog() | [4]: qdisc_put() Esto se puede abusar para desbordar el qlen de un padre. Llamar a qdisc_purge_queue() en lugar de qdisc_tree_flush_backlog() deber\u00eda corregir la ejecuci\u00f3n, porque todos los paquetes se purgar\u00e1n del qdisc antes de liberar el bloqueo.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/20f68e6a9e41693cb0e55e5b9ebbcb40983a4b8f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3aaa7c01cf19d9b9bb64b88b65c3a6fd05da2eb4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4483d8b9127591c60c4eb789d6cab953bc4522a9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/46c15c9d0f65c9ba857d63f53264f4b17e8a715f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/53d11560e957d53ee87a0653d258038ce12361b7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/93f9eeb678d4c9c1abf720b3615fa8299a490845\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d35acc1be3480505b5931f17e4ea9b7617fea4d3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e3f6745006dc9423d2b065b90f191cfa11b1b584\",\"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.