CVE-2025-71234
Full vulnerability record from the local CVENow database.
Description
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.
Severity
HIGH
CVSS score
7.8
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-02-18 16:22:30.190000
Last modified
2026-10-19 19:17:17.357000
View original CVE JSON
{
"id": "CVE-2025-71234",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-02-18T16:22:30.190",
"lastModified": "2026-10-19T19:17:17.357",
"vulnStatus": "Modified",
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{
"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->sta_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->drv_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->sta_data_size to sizeof(struct rtl8xxxu_sta_info) during\nprobe, similar to how hw->vif_data_size is configured. This ensures\nmac80211 allocates sufficient space for the driver's 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: corrección de slab-out-of-bounds en rtl8xxxu_sta_add\n\nEl controlador no establece hw->sta_data_size, lo que provoca que mac80211 asigne espacio insuficiente para los datos privados de estación del controlador en __sta_info_alloc(). Cuando rtl8xxxu_sta_add() accede a miembros de struct rtl8xxxu_sta_info a través de sta->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 tamaño 8 en la dirección ffffffd6d3e9ae88 por la tarea kworker/u16:0/12\n\nEstablecer hw->sta_data_size a sizeof(struct rtl8xxxu_sta_info) durante probe, de forma similar a cómo se configura hw->vif_data_size. Esto asegura que mac80211 asigne espacio suficiente para los datos privados por estación del controlador.\n\nProbado en placa StarFive VisionFive 2 v1.2A."
}
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