netdevsim: update queue NAPI association on queue reset

{
  "id": "d3880f139c201f19d7c2fb25eb527c710bf93d4113ab2502eb6ed7117e91ba3c",
  "url": "https://osv.dev/vulnerability/CVE-2026-90113",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "netdevsim: update queue NAPI association on queue reset",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: netdevsim: update queue NAPI association on queue reset In netdevsim, receive queues (struct nsim_rq) embed their own struct napi_struct. When queue reset is performed (e.g. via queue_reset debugfs), nsim_queue_start() swaps in a newly allocated struct nsim_rq, and nsim_queue_mem_free() later deletes and frees the old one. However, nsim_queue_start() failed to update the queue-to-NAPI mapping via netif_queue_set_napi(). As a result, dev->_rx[idx].napi continued to point to the old NAPI struct. After the old queue was freed, a subsequent queue dump via Netlink (NETDEV_CMD_QUEUE_GET) triggered a KASAN slab-use-after-free read in nla_put_napi_id() when accessing rxq->napi->napi_id. Fix this by calling netif_queue_set_napi() in nsim_queue_start() to associate the new NAPI with the RX queue, and clear the association with netif_queue_set_napi(..., NULL) in nsim_del_napi() during teardown.",
    "evidence": "osv:CVE-2026-90113",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.52",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-90113",
      "aliases": [
        "CVE-2026-90113"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5bc8e8dbef27b73bd7b6d1fd5108b4fd4c6d469f"
                },
                {
                  "fixed": "b8f32b0804b4bf0cba0ee0a093e3fd74f11d7166"
                },
                {
                  "fixed": "db038ac4dca0fa626199e9c297eddd8362be0550"
                },
                {
                  "fixed": "07e98a4d5e9c292eae97c9cc5ab0937384e48492"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90113.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.14.0"
                },
                {
                  "fixed": "6.18.52"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.2.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90113.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.657405949Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/07e98a4d5e9c292eae97c9cc5ab0937384e48492",
        "https://git.kernel.org/stable/c/b8f32b0804b4bf0cba0ee0a093e3fd74f11d7166",
        "https://git.kernel.org/stable/c/db038ac4dca0fa626199e9c297eddd8362be0550",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90113.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-90113",
        "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/2026/90xxx/CVE-2026-90113.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-90113",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 506275,
  "published_at": "2026-09-17T16:06:20.07+00:00"
}