Vulnerability-Lookup

GHSA-H8CC-85QR-G7FF

Vulnerability from github – Published: 2025-03-17 21:30 – Updated: 2026-06-01 18:31

Details

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

net/sched: act_ct: fix ref leak when switching zones

When switching zones or network namespaces without doing a ct clear in between, it is now leaking a reference to the old ct entry. That's because tcf_ct_skb_nfct_cached() returns false and tcf_ct_flow_table_lookup() may simply overwrite it.

The fix is to, as the ct entry is not reusable, free it already at tcf_ct_skb_nfct_cached().

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-2022-49183"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:00:55Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_ct: fix ref leak when switching zones\n\nWhen switching zones or network namespaces without doing a ct clear in\nbetween, it is now leaking a reference to the old ct entry. That\u0027s\nbecause tcf_ct_skb_nfct_cached() returns false and\ntcf_ct_flow_table_lookup() may simply overwrite it.\n\nThe fix is to, as the ct entry is not reusable, free it already at\ntcf_ct_skb_nfct_cached().",
  "id": "GHSA-h8cc-85qr-g7ff",
  "modified": "2026-06-01T18:31:19Z",
  "published": "2025-03-17T21:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49183"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4bb42d73def9411e5cad885b9811987d72431df1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9222a08be539cbb7a8e0d46cbc7ab9e4db273eb8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b24793a37d91aacad7cb9893b226a7924a89636a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bcb74e132a76ce0502bb33d5b65533a4ed72d159"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bcbf4e5c3b5b373cd61528392dd1ec8e9c0fd33d"
    }
  ],
  "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-2022-49183 (GCVE-0-2022-49183)

Vulnerability from cvelistv5 – Published: 2025-02-26 01:55 – Updated: 2026-06-01 16:03

Title

net/sched: act_ct: fix ref leak when switching zones

Summary

In the Linux kernel, the following vulnerability has been resolved: net/sched: act_ct: fix ref leak when switching zones When switching zones or network namespaces without doing a ct clear in between, it is now leaking a reference to the old ct entry. That's because tcf_ct_skb_nfct_cached() returns false and tcf_ct_flow_table_lookup() may simply overwrite it. The fix is to, as the ct entry is not reusable, free it already at tcf_ct_skb_nfct_cached().

Severity

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-10-01 19:47 UTC

CWE

CWE-noinfo Not enough information

Assigner

Linux mitre root

References

5 references

URL	Tags
https://git.kernel.org/stable/c/9222a08be539cbb7a…
https://git.kernel.org/stable/c/bcbf4e5c3b5b373cd…
https://git.kernel.org/stable/c/4bb42d73def9411e5…
https://git.kernel.org/stable/c/b24793a37d91aacad…
https://git.kernel.org/stable/c/bcb74e132a76ce050…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0fc1847359964e95e521cf2bb2b10f8e33dd0970 , < 9222a08be539cbb7a8e0d46cbc7ab9e4db273eb8 (git) Affected: a95ea90deb3071c1ded77a05e91cfebc5238d908 , < bcbf4e5c3b5b373cd61528392dd1ec8e9c0fd33d (git) Affected: e9408de00e5ecd0dbe91cf061c7da23711c4febb , < 4bb42d73def9411e5cad885b9811987d72431df1 (git) Affected: 2f131de361f6d0eaff17db26efdb844c178432f8 , < b24793a37d91aacad7cb9893b226a7924a89636a (git) Affected: 2f131de361f6d0eaff17db26efdb844c178432f8 , < bcb74e132a76ce0502bb33d5b65533a4ed72d159 (git) Affected: 5.10.103 , < 5.10.258 (semver) Affected: 5.15.26 , < 5.15.33 (semver) Affected: 5.16.12 , < 5.16.19 (semver)
Linux	Linux	Affected: 5.17 Unaffected: 0 , < 5.17 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.33 , ≤ 5.15.* (semver) Unaffected: 5.16.19 , ≤ 5.16.* (semver) Unaffected: 5.17.2 , ≤ 5.17.* (semver) Unaffected: 5.18 , ≤ * (original_commit_for_fix)

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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.

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.

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.