CVE-2025-71234wifi: rtl8xxxu: fix slab-out-of-bounds in rtl8xxxu_sta_add
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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
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from eef55f1545c92c7181d5083453dee1296298ad3e before 5d810ba377eddee95d30766d360a14efbb3d1872; from eef55f1545c92c7181d5083453dee1296298ad3e before 116f7bd8160c6b37d1c6939385abf90f6f6ed2f5; from eef55f1545c92c7181d5083453dee1296298ad3e before 9a0f3fa6ecd0c9c32dbc367a57482bbf7c7d25bf; from eef55f1545c92c7181d5083453dee1296298ad3e before 86c946bcc00f6390ef65e9614ae60a9377e454f8 | CNA record |
linux linux_kernel linux:linux_kernel | from 6.9 before 6.12.72; from 6.13 before 6.18.11; from 6.19 before 6.19.1 | NVD |
References
- https://git.kernel.org/stable/c/5d810ba377eddee95d30766d360a14efbb3d1872patch
- https://git.kernel.org/stable/c/116f7bd8160c6b37d1c6939385abf90f6f6ed2f5patch
- https://git.kernel.org/stable/c/9a0f3fa6ecd0c9c32dbc367a57482bbf7c7d25bfpatch
- https://git.kernel.org/stable/c/86c946bcc00f6390ef65e9614ae60a9377e454f8patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.