{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "b63c5478e9cb1d1504eb02d9dac827ad24612b32"
            },
            {
              "fixed": "6d1d9ed9b409e0662241e3d245d574a18f643494"
            },
            {
              "fixed": "95a1334748c95dd15546056280ade0c4b8dd7b78"
            },
            {
              "fixed": "b30b1675aa2bcf0491fd3830b051df4e08a7c8ca"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.17.0"
            },
            {
              "fixed": "6.18.24"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43083.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ioam6: fix OOB and missing lock\n\nWhen trace-\u003etype.bit6 is set:\n\n    if (trace-\u003etype.bit6) {\n        ...\n        queue = skb_get_tx_queue(dev, skb);\n        qdisc = rcu_dereference(queue-\u003eqdisc);\n\nThis code can lead to an out-of-bounds access of the dev-\u003e_tx[] array\nwhen is_input is true. In such a case, the packet is on the RX path and\nskb-\u003equeue_mapping contains the RX queue index of the ingress device. If\nthe ingress device has more RX queues than the egress device (dev) has\nTX queues, skb_get_queue_mapping(skb) will exceed dev-\u003enum_tx_queues.\nAdd a check to avoid this situation since skb_get_tx_queue() does not\nclamp the index. This issue has also revealed that per queue visibility\ncannot be accurate and will be replaced later as a new feature.\n\nWhile at it, add missing lock around qdisc_qstats_qlen_backlog(). The\nfunction __ioam6_fill_trace_data() is called from both softirq and\nprocess contexts, hence the use of spin_lock_bh() here.",
  "id": "CVE-2026-43083",
  "modified": "2026-07-08T05:36:14.925802450Z",
  "published": "2026-05-06T07:40:18.504Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6d1d9ed9b409e0662241e3d245d574a18f643494"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/95a1334748c95dd15546056280ade0c4b8dd7b78"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b30b1675aa2bcf0491fd3830b051df4e08a7c8ca"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43083.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43083"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "net: ioam6: fix OOB and missing lock"
}