net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list_CVE-2026-53230

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list\n\nmlx5_query_nic_vport_mac_list() sizes its firmware command buffer using\nthe PF's log_max_current_uc/mc_list capabilities. When querying a VF\nvport with a larger configured max (via devlink), the firmware response\ncan overflow this buffer:\n\n BUG: KASAN: slab-out-of-bounds in mlx5_query_nic_vport_mac_list+0x453/0x4c0 [mlx5_core]\n Read of size 4 at addr ff1100013ffc8a12 by task kworker/u96:2/385\n\n CPU: 12 UID: 0 PID: 385 Comm: kworker/u96:2 Not tainted 7.0.0-rc6+ #1 PREEMPT\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009)\n Workqueue: mlx5_esw_wq esw_vport_change_handler [mlx5_core]\n Call Trace:\n  <TASK>\n  dump_stack_lvl+0x69/0xa0\n  print_report+0x176/0x4e4\n  kasan_report+0xc8/0x100\n  mlx5_query_nic_vport_mac_list+0x453/0x4c0 [mlx5_core]\n  esw_update_vport_addr_list+0x2e3/0xda0 [mlx5_core]\n  esw_vport_change_handle_locked+0xa1f/0x1060 [mlx5_core]\n  esw_vport_change_handler+0x6a/0x90 [mlx5_core]\n  process_one_work+0x87f/0x15e0\n  worker_thread+0x62b/0x1020\n  kthread+0x375/0x490\n  ret_from_fork+0x4dc/0x810\n  ret_from_fork_asm+0x11/0x20\n  </TASK>\n\nFix by querying the vport's own HCA caps to size the buffer correctly.\nRefactor the function to allocate and return the MAC list internally,\nremoving the caller's dependency on knowing the correct max.",
    "published": "2026-06-25T08:39:29.210Z",
    "modified": "2026-06-28T06:40:41.926Z",
    "type": "cve",
    "title": "net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/41781f2789309462520a93822e946521ed78f97f\nhttps://git.kernel.org/stable/c/537d87784e81c3d7037525b99416455cee088cdc\nhttps://git.kernel.org/stable/c/0f807764bb122fd63aa45f4229cb1ef2679fbd40\nhttps://git.kernel.org/stable/c/2398e497389ed4be43f7cfbab499b49cec7dae1a\nhttps://git.kernel.org/stable/c/894e036a24a26a6dd7b17d8d3fb5c53ab48a6074",
    "id": "CVE-2026-53230",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux e16aea2744abea612c27ee0eef606c6a6a8204de\nLinux Linux e16aea2744abea612c27ee0eef606c6a6a8204de\nLinux Linux e16aea2744abea612c27ee0eef606c6a6a8204de\nLinux Linux e16aea2744abea612c27ee0eef606c6a6a8204de\nLinux Linux e16aea2744abea612c27ee0eef606c6a6a8204de\nLinux Linux 4.5",
    "sourceHref": "",
    "cvss": {
        "score": 8.7,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "e16aea2744abea612c27ee0eef606c6a6a8204de",
    "vendor": "Linux",
    "ai_description": "AI processing failed - invalid JSON response",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}