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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
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)
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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": "2026-07-14T18:08:02+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": "76",
      "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"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-10T17:00:03Z",
      "cve": "CVE-2026-52984",
      "id": "CVE-2026-52984",
      "initial_release_date": "2026-06-27T01:54:59Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "644",
      "product_status:known_not_affected": "34",
      "product_status:recommended": "273",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-52984",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-52984.json",
      "version": "13"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.