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CVE-2022-48748 (GCVE-0-2022-48748)

Vulnerability from cvelistv5 – Published: 2024-06-20 11:13 – Updated: 2026-05-11 18:46
VLAI
Title
net: bridge: vlan: fix memory leak in __allowed_ingress
Summary
In the Linux kernel, the following vulnerability has been resolved: net: bridge: vlan: fix memory leak in __allowed_ingress When using per-vlan state, if vlan snooping and stats are disabled, untagged or priority-tagged ingress frame will go to check pvid state. If the port state is forwarding and the pvid state is not learning/forwarding, untagged or priority-tagged frame will be dropped but skb memory is not freed. Should free skb when __allowed_ingress returns false.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-06-26 14:37 UTC
CWE
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a580c76d534c7360ba68042b19cb255e8420e987 , < 446ff1fc37c74093e81db40811a07b5a19f1d797 (git)
Affected: a580c76d534c7360ba68042b19cb255e8420e987 , < c5e216e880fa6f2cd9d4a6541269377657163098 (git)
Affected: a580c76d534c7360ba68042b19cb255e8420e987 , < 14be8d448fca6fe7b2a413831eedd55aef6c6511 (git)
Affected: a580c76d534c7360ba68042b19cb255e8420e987 , < fd20d9738395cf8e27d0a17eba34169699fccdff (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.6
Unaffected: 0 , < 5.6 (semver)
Unaffected: 5.10.96 , ≤ 5.10.* (semver)
Unaffected: 5.15.19 , ≤ 5.15.* (semver)
Unaffected: 5.16.5 , ≤ 5.16.* (semver)
Unaffected: 5.17 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
linux linux_kernel Affected: a580c76d534c , < 446ff1fc37c7 (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
Create a notification for this product.
linux linux_kernel Affected: a580c76d534c , < c5e216e880fa (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
Create a notification for this product.
linux linux_kernel Affected: a580c76d534c , < 14be8d448fca (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Affected: a580c76d534c , < fd20d9738395 (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Affected: 5.6
    cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 0 , < 5.6 (custom)
    cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 5.10.96 , ≤ 5.11 (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 5.15.19 , ≤ 5.16 (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 5.16.5 , ≤ 5.17 (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 5.17
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bridge: vlan: fix memory leak in __allowed_ingress\n\nWhen using per-vlan state, if vlan snooping and stats are disabled,\nuntagged or priority-tagged ingress frame will go to check pvid state.\nIf the port state is forwarding and the pvid state is not\nlearning/forwarding, untagged or priority-tagged frame will be dropped\nbut skb memory is not freed.\nShould free skb when __allowed_ingress returns false."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-11T18:46:10.125Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/446ff1fc37c74093e81db40811a07b5a19f1d797"
            },
            {
              "url": "https://git.kernel.org/stable/c/c5e216e880fa6f2cd9d4a6541269377657163098"
            },
            {
              "url": "https://git.kernel.org/stable/c/14be8d448fca6fe7b2a413831eedd55aef6c6511"
            },
            {
              "url": "https://git.kernel.org/stable/c/fd20d9738395cf8e27d0a17eba34169699fccdff"
            }
          ],
          "title": "net: bridge: vlan: fix memory leak in __allowed_ingress",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-48748",
        "datePublished": "2024-06-20T11:13:30.612Z",
        "dateReserved": "2024-06-20T11:09:39.055Z",
        "dateUpdated": "2026-05-11T18:46:10.125Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.