Vulnerability-Lookup

GHSA-29W2-R4QV-VCRW

Vulnerability from github – Published: 2026-06-24 18:32 – Updated: 2026-07-14 18:31

Details

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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-52984"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-24T17:17:09Z",
    "severity": "MODERATE"
  },
  "details": "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": "GHSA-29w2-r4qv-vcrw",
  "modified": "2026-07-14T18:31:49Z",
  "published": "2026-06-24T18:32:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52984"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0f875d52db4c921da610e481b72f03cc82fdcb72"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/39a66e83ea41fe845631eeb8d326953de27d13f9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4185701fcce6b426b6c3630b25330dddd9c47b0d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/54b5dbacd00dedffd5e2eed76de1c3839996b5e6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/74fcd8e127200a50ee22ba2b45c164722bdb9177"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8450462eaf91d5d2a9e863507b16d18e814baef3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/936a7dd87251f6f3e88983350833edf60fe6a80b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ef9a41b3870fb90577da5b2de5bd140022d4021e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-06-24 16:28 – Updated: 2026-06-24 16:28

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

No CVSS data available.

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/0f875d52db4c921da…
https://git.kernel.org/stable/c/ef9a41b3870fb9057…
https://git.kernel.org/stable/c/74fcd8e127200a50e…
https://git.kernel.org/stable/c/39a66e83ea41fe845…
https://git.kernel.org/stable/c/54b5dbacd00dedffd…
https://git.kernel.org/stable/c/8450462eaf91d5d2a…
https://git.kernel.org/stable/c/936a7dd87251f6f3e…
https://git.kernel.org/stable/c/4185701fcce6b426b…

Impacted products

2 products

Vendor	Product	Version
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)
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)

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JSON

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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
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          "programFiles": [
            "net/sched/sch_netem.c"
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              "status": "affected",
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              "status": "affected",
              "version": "5.15.175",
              "versionType": "semver"
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            {
              "lessThan": "6.1.175",
              "status": "affected",
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              "versionType": "semver"
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              "lessThan": "6.6.141",
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              "versionType": "semver"
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              "status": "unaffected",
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            },
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              "versionType": "original_commit_for_fix"
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    "state": "PUBLISHED"
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}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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GHSA-29W2-R4QV-VCRW

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

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