Vulnerability-Lookup

GHSA-RWHP-FCHM-V8MQ

Vulnerability from github – Published: 2026-07-19 18:31 – Updated: 2026-07-19 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

net: shaper: reject duplicate leaves in GROUP request

net_shaper_nl_group_doit() does not deduplicate NET_SHAPER_A_LEAVES entries. When userspace supplies the same leaf handle twice, the same old-parent pointer lands twice in old_nodes[]. The cleanup loop double frees the parent. Of course the same parent may still be in old_nodes[] twice if we are moving multiple of its leaves.

Note that this patch also implicitly fixes the fact that the i >= leaves_count path forgets to set ret.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64054"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T16:17:45Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: shaper: reject duplicate leaves in GROUP request\n\nnet_shaper_nl_group_doit() does not deduplicate NET_SHAPER_A_LEAVES\nentries. When userspace supplies the same leaf handle twice, the same\nold-parent pointer lands twice in old_nodes[]. The cleanup loop double\nfrees the parent. Of course the same parent may still be in old_nodes[]\ntwice if we are moving multiple of its leaves.\n\nNote that this patch also implicitly fixes the fact that the\ni \u003e= leaves_count path forgets to set ret.",
  "id": "GHSA-rwhp-fchm-v8mq",
  "modified": "2026-07-19T18:31:50Z",
  "published": "2026-07-19T18:31:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64054"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/31767bf852b59f05125b58a17007e4cd1ea9eb2e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5098b223f0f0c5c18a3884a8b0ea5bd4a0c7bd75"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a9a2fa1da619f276580b0d4c5d12efac89e8642b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-64054 (GCVE-0-2026-64054)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:39 – Updated: 2026-07-19 15:39

Title

net: shaper: reject duplicate leaves in GROUP request

Summary

In the Linux kernel, the following vulnerability has been resolved: net: shaper: reject duplicate leaves in GROUP request net_shaper_nl_group_doit() does not deduplicate NET_SHAPER_A_LEAVES entries. When userspace supplies the same leaf handle twice, the same old-parent pointer lands twice in old_nodes[]. The cleanup loop double frees the parent. Of course the same parent may still be in old_nodes[] twice if we are moving multiple of its leaves. Note that this patch also implicitly fixes the fact that the i >= leaves_count path forgets to set ret.

Severity

No CVSS data available.

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/5098b223f0f0c5c18…
https://git.kernel.org/stable/c/31767bf852b59f051…
https://git.kernel.org/stable/c/a9a2fa1da619f2765…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 5d5d4700e75d861e83bf18eb6bf66ff90f85fe4e , < 5098b223f0f0c5c18a3884a8b0ea5bd4a0c7bd75 (git) Affected: 5d5d4700e75d861e83bf18eb6bf66ff90f85fe4e , < 31767bf852b59f05125b58a17007e4cd1ea9eb2e (git) Affected: 5d5d4700e75d861e83bf18eb6bf66ff90f85fe4e , < a9a2fa1da619f276580b0d4c5d12efac89e8642b (git)
Linux	Linux	Affected: 6.13 Unaffected: 0 , < 6.13 (semver) Unaffected: 6.18.34 , ≤ 6.18.* (semver) Unaffected: 7.0.11 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/shaper/shaper.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "31767bf852b59f05125b58a17007e4cd1ea9eb2e",
              "status": "affected",
              "version": "5d5d4700e75d861e83bf18eb6bf66ff90f85fe4e",
              "versionType": "git"
            },
            {
              "lessThan": "a9a2fa1da619f276580b0d4c5d12efac89e8642b",
              "status": "affected",
              "version": "5d5d4700e75d861e83bf18eb6bf66ff90f85fe4e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/shaper/shaper.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.13"
            },
            {
              "lessThan": "6.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
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              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.34",
                  "versionStartIncluding": "6.13",
                  "vulnerable": true
                },
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                },
                {
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                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: shaper: reject duplicate leaves in GROUP request\n\nnet_shaper_nl_group_doit() does not deduplicate NET_SHAPER_A_LEAVES\nentries. When userspace supplies the same leaf handle twice, the same\nold-parent pointer lands twice in old_nodes[]. The cleanup loop double\nfrees the parent. Of course the same parent may still be in old_nodes[]\ntwice if we are moving multiple of its leaves.\n\nNote that this patch also implicitly fixes the fact that the\ni \u003e= leaves_count path forgets to set ret."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-19T15:39:36.475Z",
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        {
          "url": "https://git.kernel.org/stable/c/a9a2fa1da619f276580b0d4c5d12efac89e8642b"
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      ],
      "title": "net: shaper: reject duplicate leaves in GROUP request",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64054",
    "datePublished": "2026-07-19T15:39:36.475Z",
    "dateReserved": "2026-07-19T07:54:57.029Z",
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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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-RWHP-FCHM-V8MQ

CVE-2026-64054 (GCVE-0-2026-64054)

Tags

Sightings

Nomenclature