wifi: rtl8xxxu: fix slab-out-of-bounds in rtl8xxxu_sta_add

{
  "id": "2719963f8d0a800357ae9dcfa7230c657574e4fd6fd0c5753ccf4d6fd675224b",
  "url": "https://osv.dev/vulnerability/CVE-2025-71234",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "wifi: rtl8xxxu: fix slab-out-of-bounds in rtl8xxxu_sta_add",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: wifi: rtl8xxxu: fix slab-out-of-bounds in rtl8xxxu_sta_add The driver does not set hw->sta_data_size, which causes mac80211 to allocate insufficient space for driver private station data in __sta_info_alloc(). When rtl8xxxu_sta_add() accesses members of struct rtl8xxxu_sta_info through sta->drv_priv, this results in a slab-out-of-bounds write. KASAN report on RISC-V (VisionFive 2) with RTL8192EU adapter: BUG: KASAN: slab-out-of-bounds in rtl8xxxu_sta_add+0x31c/0x346 Write of size 8 at addr ffffffd6d3e9ae88 by task kworker/u16:0/12 Set hw->sta_data_size to sizeof(struct rtl8xxxu_sta_info) during probe, similar to how hw->vif_data_size is configured. This ensures mac80211 allocates sufficient space for the driver's per-station private data. Tested on StarFive VisionFive 2 v1.2A board.",
    "evidence": "osv:CVE-2025-71234",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.72",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.11",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.19.1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-71234",
      "aliases": [
        "CVE-2025-71234"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                {
                  "fixed": "5d810ba377eddee95d30766d360a14efbb3d1872"
                },
                {
                  "fixed": "116f7bd8160c6b37d1c6939385abf90f6f6ed2f5"
                },
                {
                  "fixed": "9a0f3fa6ecd0c9c32dbc367a57482bbf7c7d25bf"
                },
                {
                  "fixed": "86c946bcc00f6390ef65e9614ae60a9377e454f8"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-71234.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.9.0"
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                {
                  "fixed": "6.12.72"
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            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.11"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "6.19.1"
                }
              ]
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-71234.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.267838596Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/116f7bd8160c6b37d1c6939385abf90f6f6ed2f5",
        "https://git.kernel.org/stable/c/5d810ba377eddee95d30766d360a14efbb3d1872",
        "https://git.kernel.org/stable/c/86c946bcc00f6390ef65e9614ae60a9377e454f8",
        "https://git.kernel.org/stable/c/9a0f3fa6ecd0c9c32dbc367a57482bbf7c7d25bf",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71234.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-71234",
        "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/2025/71xxx/CVE-2025-71234.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-71234",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490780,
  "published_at": "2026-02-18T14:53:18.893+00:00"
}