net/mlx5e: Fix "scheduling while atomic" in IPsec MAC address query

{
  "id": "fcda981cba87e9713389089827d6b82fb9e3ab2ba335e8680176888e027b1799",
  "url": "https://osv.dev/vulnerability/CVE-2026-43199",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net/mlx5e: Fix \"scheduling while atomic\" in IPsec MAC address query",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix \"scheduling while atomic\" in IPsec MAC address query Fix a \"scheduling while atomic\" bug in mlx5e_ipsec_init_macs() by replacing mlx5_query_mac_address() with ether_addr_copy() to get the local MAC address directly from netdev->dev_addr. The issue occurs because mlx5_query_mac_address() queries the hardware which involves mlx5_cmd_exec() that can sleep, but it is called from the mlx5e_ipsec_handle_event workqueue which runs in atomic context. The MAC address is already available in netdev->dev_addr, so no need to query hardware. This avoids the sleeping call and resolves the bug. Call trace: BUG: scheduling while atomic: kworker/u112:2/69344/0x00000200 __schedule+0x7ab/0xa20 schedule+0x1c/0xb0 schedule_timeout+0x6e/0xf0 __wait_for_common+0x91/0x1b0 cmd_exec+0xa85/0xff0 [mlx5_core] mlx5_cmd_exec+0x1f/0x50 [mlx5_core] mlx5_query_nic_vport_mac_address+0x7b/0xd0 [mlx5_core] mlx5_query_mac_address+0x19/0x30 [mlx5_core] mlx5e_ipsec_init_macs+0xc1/0x720 [mlx5_core] mlx5e_ipsec_build_accel_xfrm_attrs+0x422/0x670 [mlx5_core] mlx5e_ipsec_handle_event+0x2b9/0x460 [mlx5_core] process_one_work+0x178/0x2e0 worker_thread+0x2ea/0x430",
    "evidence": "osv:CVE-2026-43199",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "6.6.160",
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          {
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          {
            "value": "6.18.16",
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          {
            "value": "6.19.6",
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    "severity": "high",
    "structured": {
      "id": "CVE-2026-43199",
      "aliases": [
        "CVE-2026-43199"
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      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
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      "modified": "2026-10-28T02:30:30.758363778Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/546de94e41e92e1f7dc6213615fb7c794d05db98",
        "https://git.kernel.org/stable/c/57957bc7f1865778ec9b1618e15515feb6df7eb4",
        "https://git.kernel.org/stable/c/5efde07521309274f26727860774614cbc187242",
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        "https://git.kernel.org/stable/c/e1407fb7c337373dfaaae2445d828b0b9ae26a29",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43199.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-43199",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43199.json"
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    "severity_evidence": "/severity/0/score"
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  "source_id": "core-osv",
  "document_id": 497810,
  "published_at": "2026-05-06T11:28:06.232+00:00"
}