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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= eef55f1545c92c7181d5083453dee1296298ad3e, < 5d810ba377eddee95d30766d360a14efbb3d1872; >= eef55f1545c92c7181d5083453dee1296298ad3e, < 116f7bd8160c6b37d1c6939385abf90f6f6ed2f5; >= eef55f1545c92c7181d5083453dee1296298ad3e, < 9a0f3fa6ecd0c9c32dbc367a57482bbf7c7d25bf; >= eef55f1545c92c7181d5083453dee1296298ad3e, < 86c946bcc00f6390ef65e9614ae60a9377e454f8 |
| Linux | Linux | 6.9 |
References
- https://git.kernel.org/stable/c/116f7bd8160c6b37d1c6939385abf90f6f6ed2f5Patch
- https://git.kernel.org/stable/c/5d810ba377eddee95d30766d360a14efbb3d1872Patch
- https://git.kernel.org/stable/c/86c946bcc00f6390ef65e9614ae60a9377e454f8Patch
- https://git.kernel.org/stable/c/9a0f3fa6ecd0c9c32dbc367a57482bbf7c7d25bfPatch
Timeline
- Published
- Feb 18, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Modified