{
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          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c"
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Fix \"scheduling while atomic\" in IPsec MAC address query\n\nFix a \"scheduling while atomic\" bug in mlx5e_ipsec_init_macs() by\nreplacing mlx5_query_mac_address() with ether_addr_copy() to get the\nlocal MAC address directly from netdev-\u003edev_addr.\n\nThe issue occurs because mlx5_query_mac_address() queries the hardware\nwhich involves mlx5_cmd_exec() that can sleep, but it is called from\nthe mlx5e_ipsec_handle_event workqueue which runs in atomic context.\n\nThe MAC address is already available in netdev-\u003edev_addr, so no need\nto query hardware. This avoids the sleeping call and resolves the bug.\n\nCall trace:\n  BUG: scheduling while atomic: kworker/u112:2/69344/0x00000200\n  __schedule+0x7ab/0xa20\n  schedule+0x1c/0xb0\n  schedule_timeout+0x6e/0xf0\n  __wait_for_common+0x91/0x1b0\n  cmd_exec+0xa85/0xff0 [mlx5_core]\n  mlx5_cmd_exec+0x1f/0x50 [mlx5_core]\n  mlx5_query_nic_vport_mac_address+0x7b/0xd0 [mlx5_core]\n  mlx5_query_mac_address+0x19/0x30 [mlx5_core]\n  mlx5e_ipsec_init_macs+0xc1/0x720 [mlx5_core]\n  mlx5e_ipsec_build_accel_xfrm_attrs+0x422/0x670 [mlx5_core]\n  mlx5e_ipsec_handle_event+0x2b9/0x460 [mlx5_core]\n  process_one_work+0x178/0x2e0\n  worker_thread+0x2ea/0x430"
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            "version": "3.1"
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              "value": "AV:N - The vulnerable path runs in mlx5 IPsec packet offload event handling, which can be driven by traffic on an exposed IPsec tunnel. A remote peer can cause the NIC ESN object-change event without local execution on the target.\nAC:L - There is no attacker-controlled race to win; once a packet-offload tunnel SA with ESN is present, the event path deterministically reaches the atomic-sleep bug. Traffic volume/sequence advancement is attacker-influenced.\nPR:N - The SA setup is a normal deployment precondition for the affected IPsec offload service, not a privilege the attacker must hold on the target. The packet sender needs no local account or target-side administrative capability.\nUI:N - No victim user action is needed after the susceptible IPsec offload configuration exists. The trigger is packet/event driven.\nS:U - The impact is within the kernel and the mlx5/IPsec networking subsystem on the same host. It does not cross a VM, IOMMU, or other separate security authority boundary.\nC:N - The bug is a sleeping firmware MAC query while holding a spinlock, not an out-of-bounds access, UAF, or information disclosure primitive. No kernel memory is exposed.\nI:N - The vulnerable call does not corrupt memory or provide an attacker-controlled write. It only performs a blocking command from atomic context.\nA:H - The kernel reports BUG: scheduling while atomic and the scheduler path can panic via panic-on-warn or destabilize the worker/kernel state. The trigger can be repeated, making denial of service high impact."
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        {
          "url": "https://git.kernel.org/stable/c/859380694f434597407632c29f30fdb5e763e6cc"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43199",
    "datePublished": "2026-05-06T11:28:06.232Z",
    "dateReserved": "2026-05-01T14:12:55.992Z",
    "dateUpdated": "2026-08-05T12:26:30.810Z",
    "state": "PUBLISHED"
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      "source": "Microsoft CSAF VEX",
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      "title": "net/mlx5e: Fix \"scheduling while atomic\" in IPsec MAC address query",
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    "redhat_vex": {
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      "current_release_date": "2026-07-02T12:50:38+00:00",
      "cve": "CVE-2026-43199",
      "id": "CVE-2026-43199",
      "initial_release_date": "2026-05-06T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net/mlx5e: Fix \"scheduling while atomic\" in IPsec MAC address query",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43199.json",
      "version": "3"
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}