CVE-2022-49582 (GCVE-0-2022-49582)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:23 – Updated: 2026-05-11 19:02
VLAI
Title
net: dsa: fix NULL pointer dereference in dsa_port_reset_vlan_filtering
Summary
In the Linux kernel, the following vulnerability has been resolved: net: dsa: fix NULL pointer dereference in dsa_port_reset_vlan_filtering The "ds" iterator variable used in dsa_port_reset_vlan_filtering() -> dsa_switch_for_each_port() overwrites the "dp" received as argument, which is later used to call dsa_port_vlan_filtering() proper. As a result, switches which do enter that code path (the ones with vlan_filtering_is_global=true) will dereference an invalid dp in dsa_port_reset_vlan_filtering() after leaving a VLAN-aware bridge. Use a dedicated "other_dp" iterator variable to avoid this from happening.
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 19:36 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: d0004a020bb50263de0e3e775c7b7c7a003e0e0c , < 3240e12fe203a3a79b9814e83327106b770ed7b0 (git)
Affected: d0004a020bb50263de0e3e775c7b7c7a003e0e0c , < 1699b4d502eda3c7ea4070debad3ee570b5091b1 (git)
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Linux Linux Affected: 5.16
Unaffected: 0 , < 5.16 (semver)
Unaffected: 5.18.15 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: fix NULL pointer dereference in dsa_port_reset_vlan_filtering\n\nThe \"ds\" iterator variable used in dsa_port_reset_vlan_filtering() -\u003e\ndsa_switch_for_each_port() overwrites the \"dp\" received as argument,\nwhich is later used to call dsa_port_vlan_filtering() proper.\n\nAs a result, switches which do enter that code path (the ones with\nvlan_filtering_is_global=true) will dereference an invalid dp in\ndsa_port_reset_vlan_filtering() after leaving a VLAN-aware bridge.\n\nUse a dedicated \"other_dp\" iterator variable to avoid this from\nhappening."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-11T19:02:44.112Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/3240e12fe203a3a79b9814e83327106b770ed7b0"
            },
            {
              "url": "https://git.kernel.org/stable/c/1699b4d502eda3c7ea4070debad3ee570b5091b1"
            }
          ],
          "title": "net: dsa: fix NULL pointer dereference in dsa_port_reset_vlan_filtering",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-49582",
        "datePublished": "2025-02-26T02:23:19.626Z",
        "dateReserved": "2025-02-26T02:21:30.412Z",
        "dateUpdated": "2026-05-11T19:02:44.112Z",
        "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.

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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.