Linux kernel rtl8xxxu slab-OOB in rtl8xxxu_sta_add
CVE-2025-71234 Published on February 18, 2026
wifi: rtl8xxxu: fix slab-out-of-bounds in rtl8xxxu_sta_add
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.
Products Associated with CVE-2025-71234
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Affected Versions
Linux:- Version eef55f1545c92c7181d5083453dee1296298ad3e and below 5d810ba377eddee95d30766d360a14efbb3d1872 is affected.
- Version eef55f1545c92c7181d5083453dee1296298ad3e and below 116f7bd8160c6b37d1c6939385abf90f6f6ed2f5 is affected.
- Version eef55f1545c92c7181d5083453dee1296298ad3e and below 9a0f3fa6ecd0c9c32dbc367a57482bbf7c7d25bf is affected.
- Version eef55f1545c92c7181d5083453dee1296298ad3e and below 86c946bcc00f6390ef65e9614ae60a9377e454f8 is affected.
- Version 6.9 is affected.
- Before 6.9 is unaffected.
- Version 6.12.72, <= 6.12.* is unaffected.
- Version 6.18.11, <= 6.18.* is unaffected.
- Version 6.19.1, <= 6.19.* is unaffected.
- Version 7.0-rc1, <= * is unaffected.
Exploit Probability
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