FKIE_CVE-2025-71234

Vulnerability from fkie_nvd - Published: 2026-02-18 16:22 - Updated: 2026-02-23 04:15
Severity ?
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/116f7bd8160c6b37d1c6939385abf90f6f6ed2f5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5d810ba377eddee95d30766d360a14efbb3d1872
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/86c946bcc00f6390ef65e9614ae60a9377e454f8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9a0f3fa6ecd0c9c32dbc367a57482bbf7c7d25bf
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtl8xxxu: fix slab-out-of-bounds in rtl8xxxu_sta_add\n\nThe driver does not set hw-\u003esta_data_size, which causes mac80211 to\nallocate insufficient space for driver private station data in\n__sta_info_alloc(). When rtl8xxxu_sta_add() accesses members of\nstruct rtl8xxxu_sta_info through sta-\u003edrv_priv, this results in a\nslab-out-of-bounds write.\n\nKASAN report on RISC-V (VisionFive 2) with RTL8192EU adapter:\n\n  BUG: KASAN: slab-out-of-bounds in rtl8xxxu_sta_add+0x31c/0x346\n  Write of size 8 at addr ffffffd6d3e9ae88 by task kworker/u16:0/12\n\nSet hw-\u003esta_data_size to sizeof(struct rtl8xxxu_sta_info) during\nprobe, similar to how hw-\u003evif_data_size is configured. This ensures\nmac80211 allocates sufficient space for the driver\u0027s per-station\nprivate data.\n\nTested on StarFive VisionFive 2 v1.2A board."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nwifi: rtl8xxxu: correcci\u00f3n de slab-out-of-bounds en rtl8xxxu_sta_add\n\nEl controlador no establece hw-\u0026gt;sta_data_size, lo que provoca que mac80211 asigne espacio insuficiente para los datos privados de estaci\u00f3n del controlador en __sta_info_alloc(). Cuando rtl8xxxu_sta_add() accede a miembros de struct rtl8xxxu_sta_info a trav\u00e9s de sta-\u0026gt;drv_priv, esto resulta en una escritura slab-out-of-bounds.\n\nInforme KASAN en RISC-V (VisionFive 2) con adaptador RTL8192EU:\n\n  BUG: KASAN: slab-out-of-bounds en rtl8xxxu_sta_add+0x31c/0x346\n  Escritura de tama\u00f1o 8 en la direcci\u00f3n ffffffd6d3e9ae88 por la tarea kworker/u16:0/12\n\nEstablecer hw-\u0026gt;sta_data_size a sizeof(struct rtl8xxxu_sta_info) durante probe, de forma similar a c\u00f3mo se configura hw-\u0026gt;vif_data_size. Esto asegura que mac80211 asigne espacio suficiente para los datos privados por estaci\u00f3n del controlador.\n\nProbado en placa StarFive VisionFive 2 v1.2A."
    }
  ],
  "id": "CVE-2025-71234",
  "lastModified": "2026-02-23T04:15:59.490",
  "metrics": {},
  "published": "2026-02-18T16:22:30.190",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/116f7bd8160c6b37d1c6939385abf90f6f6ed2f5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5d810ba377eddee95d30766d360a14efbb3d1872"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/86c946bcc00f6390ef65e9614ae60a9377e454f8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9a0f3fa6ecd0c9c32dbc367a57482bbf7c7d25bf"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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