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GHSA-H2VH-MR24-CXMC

Vulnerability from github – Published: 2026-05-28 12:30 – Updated: 2026-06-09 21:32

Details

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

8021q: delete cleared egress QoS mappings

vlan_dev_set_egress_priority() currently keeps cleared egress priority mappings in the hash as tombstones. Repeated set/clear cycles with distinct skb priorities therefore accumulate mapping nodes until device teardown and leak memory.

Delete mappings when vlan_prio is cleared instead of keeping tombstones. Now that the egress mapping lists are RCU protected, the node can be unlinked safely and freed after a grace period.

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-2026-46153"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-28T10:16:30Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\n8021q: delete cleared egress QoS mappings\n\nvlan_dev_set_egress_priority() currently keeps cleared egress\npriority mappings in the hash as tombstones. Repeated set/clear cycles\nwith distinct skb priorities therefore accumulate mapping nodes until\ndevice teardown and leak memory.\n\nDelete mappings when vlan_prio is cleared instead of keeping tombstones.\nNow that the egress mapping lists are RCU protected, the node can be\nunlinked safely and freed after a grace period.",
  "id": "GHSA-h2vh-mr24-cxmc",
  "modified": "2026-06-09T21:32:19Z",
  "published": "2026-05-28T12:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46153"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7dddc74af369478ba7f9bc136d0fc1dc4570cb66"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a52e122c9e4d56ad9a03b32c915a199276d989c3"
    }
  ],
  "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-2026-46153 (GCVE-0-2026-46153)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:36 – Updated: 2026-06-14 17:58

Title

8021q: delete cleared egress QoS mappings

Summary

In the Linux kernel, the following vulnerability has been resolved: 8021q: delete cleared egress QoS mappings vlan_dev_set_egress_priority() currently keeps cleared egress priority mappings in the hash as tombstones. Repeated set/clear cycles with distinct skb priorities therefore accumulate mapping nodes until device teardown and leak memory. Delete mappings when vlan_prio is cleared instead of keeping tombstones. Now that the egress mapping lists are RCU protected, the node can be unlinked safely and freed after a grace period.

Severity

No CVSS data available.

Assigner

Linux mitre root Scorecard

References

2 references

URL	Tags
https://git.kernel.org/stable/c/a52e122c9e4d56ad9…
https://git.kernel.org/stable/c/7dddc74af369478ba…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a52e122c9e4d56ad9a03b32c915a199276d989c3 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7dddc74af369478ba7f9bc136d0fc1dc4570cb66 (git)
Linux	Linux	Affected: 2.6.12 Unaffected: 0 , < 2.6.12 (semver) Unaffected: 7.0.7 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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          "programFiles": [
            "net/8021q/vlan_dev.c",
            "net/8021q/vlan_netlink.c"
          ],
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          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a52e122c9e4d56ad9a03b32c915a199276d989c3",
              "status": "affected",
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              "versionType": "git"
            },
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              "lessThan": "7dddc74af369478ba7f9bc136d0fc1dc4570cb66",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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            }
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        },
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          "product": "Linux",
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            "net/8021q/vlan_netlink.c"
          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.12"
            },
            {
              "lessThan": "2.6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "7.0.*",
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              "version": "7.0.7",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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                  "versionStartIncluding": "2.6.12",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\n8021q: delete cleared egress QoS mappings\n\nvlan_dev_set_egress_priority() currently keeps cleared egress\npriority mappings in the hash as tombstones. Repeated set/clear cycles\nwith distinct skb priorities therefore accumulate mapping nodes until\ndevice teardown and leak memory.\n\nDelete mappings when vlan_prio is cleared instead of keeping tombstones.\nNow that the egress mapping lists are RCU protected, the node can be\nunlinked safely and freed after a grace period."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-14T17:58:29.635Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "cveId": "CVE-2026-46153",
    "datePublished": "2026-05-28T09:36:09.415Z",
    "dateReserved": "2026-05-13T15:03:33.101Z",
    "dateUpdated": "2026-06-14T17:58:29.635Z",
    "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.
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GHSA-H2VH-MR24-CXMC

CVE-2026-46153 (GCVE-0-2026-46153)

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