CVE-2022-49234 (GCVE-0-2022-49234)
Vulnerability from cvelistv5
Published
2025-02-26 01:55
Modified
2025-05-04 08:33
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net: dsa: Avoid cross-chip syncing of VLAN filtering Changes to VLAN filtering are not applicable to cross-chip notifications. On a system like this: .-----. .-----. .-----. | sw1 +---+ sw2 +---+ sw3 | '-1-2-' '-1-2-' '-1-2-' Before this change, upon sw1p1 leaving a bridge, a call to dsa_port_vlan_filtering would also be made to sw2p1 and sw3p1. In this scenario: .---------. .-----. .-----. | sw1 +---+ sw2 +---+ sw3 | '-1-2-3-4-' '-1-2-' '-1-2-' When sw1p4 would leave a bridge, dsa_port_vlan_filtering would be called for sw2 and sw3 with a non-existing port - leading to array out-of-bounds accesses and crashes on mv88e6xxx.
References
Impacted products
Vendor Product Version
Linux Linux Version: d371b7c92d190448f3ccbf082c90bf929285f648
Version: d371b7c92d190448f3ccbf082c90bf929285f648
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          "programFiles": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: Avoid cross-chip syncing of VLAN filtering\n\nChanges to VLAN filtering are not applicable to cross-chip\nnotifications.\n\nOn a system like this:\n\n.-----.   .-----.   .-----.\n| sw1 +---+ sw2 +---+ sw3 |\n\u0027-1-2-\u0027   \u0027-1-2-\u0027   \u0027-1-2-\u0027\n\nBefore this change, upon sw1p1 leaving a bridge, a call to\ndsa_port_vlan_filtering would also be made to sw2p1 and sw3p1.\n\nIn this scenario:\n\n.---------.   .-----.   .-----.\n|   sw1   +---+ sw2 +---+ sw3 |\n\u0027-1-2-3-4-\u0027   \u0027-1-2-\u0027   \u0027-1-2-\u0027\n\nWhen sw1p4 would leave a bridge, dsa_port_vlan_filtering would be\ncalled for sw2 and sw3 with a non-existing port - leading to array\nout-of-bounds accesses and crashes on mv88e6xxx."
        }
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      "providerMetadata": {
        "dateUpdated": "2025-05-04T08:33:01.348Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/108dc8741c203e9d6ce4e973367f1bac20c7192b"
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      "title": "net: dsa: Avoid cross-chip syncing of VLAN filtering",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49234",
    "datePublished": "2025-02-26T01:55:59.615Z",
    "dateReserved": "2025-02-26T01:49:39.294Z",
    "dateUpdated": "2025-05-04T08:33:01.348Z",
    "state": "PUBLISHED"
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  }
}


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