CVE-2025-71234

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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/116f7bd8160c6b37d1c6939385abf90f6f6ed2f5	Patch
https://git.kernel.org/stable/c/5d810ba377eddee95d30766d360a14efbb3d1872	Patch
https://git.kernel.org/stable/c/86c946bcc00f6390ef65e9614ae60a9377e454f8	Patch
https://git.kernel.org/stable/c/9a0f3fa6ecd0c9c32dbc367a57482bbf7c7d25bf	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2026-02-18 16:22

Updated : 2026-07-30 06:24

NVD link : CVE-2025-71234

Mitre link : CVE-2025-71234

CVE.ORG link : CVE-2025-71234

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-787

Out-of-bounds Write

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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: correcci\u00f3n 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 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->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->sta_data_size a sizeof(struct rtl8xxxu_sta_info) durante probe, de forma similar a c\u00f3mo se configura hw->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."}], "lastModified": "2026-07-30T06:24:56.307", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BC3EBF44-550D-4B5C-9CD4-93342B1A49F4", "versionEndExcluding": "6.12.72", "versionStartIncluding": "6.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7099A9EC-3D54-4424-BF01-7224EF88C79C", "versionEndExcluding": "6.18.11", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EE543C0D-A06B-414F-A403-CB1E088F261E", "versionEndExcluding": "6.19.1", "versionStartIncluding": "6.19"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}