CVE-2026-52984 (GCVE-0-2026-52984)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:28 – Updated: 2026-06-24 16:28
VLAI
Title
net/sched: netem: fix queue limit check to include reordered packets
Summary
In the Linux kernel, the following vulnerability has been resolved: net/sched: netem: fix queue limit check to include reordered packets The queue limit check in netem_enqueue() uses q->t_len which only counts packets in the internal tfifo. Packets placed in sch->q by the reorder path (__qdisc_enqueue_head) are not counted, allowing the total queue occupancy to exceed sch->limit under reordering. Include sch->q.qlen in the limit check.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7018 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 216509dda290f6db92c816dd54b83c1df9da9e76 , < 0f875d52db4c921da610e481b72f03cc82fdcb72 (git)
Affected: c2047b0e216c8edce227d7c42f99ac2877dad0e4 , < ef9a41b3870fb90577da5b2de5bd140022d4021e (git)
Affected: 10df49cfca73dfbbdb6c4150d859f7e8926ae427 , < 74fcd8e127200a50ee22ba2b45c164722bdb9177 (git)
Affected: 3824c5fad18eeb7abe0c4fc966f29959552dca3e , < 39a66e83ea41fe845631eeb8d326953de27d13f9 (git)
Affected: 356078a5c55ec8d2061fcc009fb8599f5b0527f9 , < 54b5dbacd00dedffd5e2eed76de1c3839996b5e6 (git)
Affected: f8d4bc455047cf3903cd6f85f49978987dbb3027 , < 8450462eaf91d5d2a9e863507b16d18e814baef3 (git)
Affected: f8d4bc455047cf3903cd6f85f49978987dbb3027 , < 936a7dd87251f6f3e88983350833edf60fe6a80b (git)
Affected: f8d4bc455047cf3903cd6f85f49978987dbb3027 , < 4185701fcce6b426b6c3630b25330dddd9c47b0d (git)
Affected: 83c6ab12f08dcc09d4c5ac86fdb89736b28f1d31 (git)
Affected: 5.10.232 , < 5.10.258 (semver)
Affected: 5.15.175 , < 5.15.209 (semver)
Affected: 6.1.121 , < 6.1.175 (semver)
Affected: 6.6.67 , < 6.6.141 (semver)
Affected: 6.12.6 , < 6.12.91 (semver)
Affected: 5.4.288 , < 5.5 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.13
Unaffected: 0 , < 6.13 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.141 , ≤ 6.6.* (semver)
Unaffected: 6.12.91 , ≤ 6.12.* (semver)
Unaffected: 6.18.33 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:*",
                    "matchCriteriaId": "93C0660D-7FB8-4FBA-892A-B064BA71E49E",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:*",
                    "matchCriteriaId": "034C36A6-C481-41F3-AE9A-D116E5BE6895",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:*",
                    "matchCriteriaId": "8AF9DC49-2085-4FFB-A7E3-73DFAFECC7F2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc7:*:*:*:*:*:*",
                    "matchCriteriaId": "5DFCDFB8-4FD0-465A-9076-D813D78FE51B",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*",
                    "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: netem: fix queue limit check to include reordered packets\n\nThe queue limit check in netem_enqueue() uses q-\u003et_len which only\ncounts packets in the internal tfifo. Packets placed in sch-\u003eq by\nthe reorder path (__qdisc_enqueue_head) are not counted, allowing\nthe total queue occupancy to exceed sch-\u003elimit under reordering.\n\nInclude sch-\u003eq.qlen in the limit check."
          }
        ],
        "id": "CVE-2026-52984",
        "lastModified": "2026-07-14T16:47:58.927",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2026-06-24T17:17:09.127",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/0f875d52db4c921da610e481b72f03cc82fdcb72"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/39a66e83ea41fe845631eeb8d326953de27d13f9"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/4185701fcce6b426b6c3630b25330dddd9c47b0d"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/54b5dbacd00dedffd5e2eed76de1c3839996b5e6"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/74fcd8e127200a50ee22ba2b45c164722bdb9177"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/8450462eaf91d5d2a9e863507b16d18e814baef3"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/936a7dd87251f6f3e88983350833edf60fe6a80b"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/ef9a41b3870fb90577da5b2de5bd140022d4021e"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-10-29T09:40:48+00:00",
      "cve": "CVE-2026-52984",
      "id": "CVE-2026-52984",
      "initial_release_date": "2026-06-24T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "78",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net/sched: netem: fix queue limit check to include reordered packets",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52984.json",
      "version": "3"
    }
  }
}



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