{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.176-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.85-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.19.14-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  ixgbevf: add missing negotiate_features op to Hyper-V ops table  Commit a7075f501bd3 (\"ixgbevf: fix mailbox API compatibility by negotiating supported features\") added the .negotiate_features callback to ixgbe_mac_operations and populated it in ixgbevf_mac_ops, but forgot to add it to ixgbevf_hv_mac_ops. This leaves the function pointer NULL on Hyper-V VMs.  During probe, ixgbevf_negotiate_api() calls ixgbevf_set_features(), which unconditionally dereferences hw-\u003emac.ops.negotiate_features(). On Hyper-V this results in a NULL pointer dereference:    BUG: kernel NULL pointer dereference, address: 0000000000000000   [...]   Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine [...]   Workqueue: events work_for_cpu_fn   RIP: 0010:0x0   [...]   Call Trace:    ixgbevf_negotiate_api+0x66/0x160 [ixgbevf]    ixgbevf_sw_init+0xe4/0x1f0 [ixgbevf]    ixgbevf_probe+0x20f/0x4a0 [ixgbevf]    local_pci_probe+0x50/0xa0    work_for_cpu_fn+0x1a/0x30    [...]  Add ixgbevf_hv_negotiate_features_vf() that returns -EOPNOTSUPP and wire it into ixgbevf_hv_mac_ops. The caller already handles -EOPNOTSUPP gracefully.",
  "id": "DEBIAN-CVE-2026-43094",
  "modified": "2026-09-14T16:47:33.823849179Z",
  "published": "2026-05-06T10:16:22.790Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-43094"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-43094"
  ]
}