high 8.8

CVE-2025-71234 json

wifi: rtl8xxxu: fix slab-out-of-bounds in rtl8xxxu_sta_add

published 2026-02-18 8 mo ago modified 2026-10-19 20 d ago also EUVD-2025-207664

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 14%
public exploits: 0; none known

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.

Patch / fix

fixed in 1 distros 3 links 4

Linux Linux 6.12.72, 6.18.11, 6.19.1, 7.0

debian suse opensuse

linux Debian 13 6.12.73-1
linux Debian 14 6.18.12-1

debian advisories DEBIAN-CVE-2025-71234

kernel-64kb SLE Module for Basesystem 15 SP7 6.4.0-150700.53.34.1
kernel-syms SLE Module for Development Tools 15 SP7 6.4.0-150700.53.34.1
kernel-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.53.34.1
kernel-source SLE Module for Development Tools 15 SP7, SLE Module for Basesystem 15 SP7 6.4.0-150700.53.34.1
kernel-default SLE Workstation Extension 15 SP7, SLE Module for Legacy 15 SP7, SLE Module for Basesystem 15 SP7 +2 more 6.4.0-150700.53.34.1
kernel-zfcpdump SLE Module for Basesystem 15 SP7 6.4.0-150700.53.34.1
kernel-obs-build SLE Module for Development Tools 15 SP7 6.4.0-150700.53.34.1
kernel-default-base SLE Module for Basesystem 15 SP7 6.4.0-150700.53.34.1.150700.17.23.1

suse advisories SUSE-SU-2026:1081-1 SUSE-SU-2026:20873-1 SUSE-SU-2026:20838-1 SUSE-SU-2026:20931-1 SUSE-SU-2026:20845-1 SUSE-SU-2026:20876-1

kernel-rt openSUSE Leap 16.0 6.12.0-160000.27.1
dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.27.1
kernel-64kb openSUSE Leap 16.0 6.12.0-160000.27.1
kernel-syms openSUSE Leap 16.0 6.12.0-160000.27.1
kernel-azure openSUSE Leap 16.0 6.12.0-160000.27.1
kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.27.1
kernel-source openSUSE Leap 16.0 6.12.0-160000.27.1
kernel-default openSUSE Leap 16.0 6.12.0-160000.27.1

opensuse advisories openSUSE-SU-2026:20416-1 openSUSE-SU-2026:10387-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-71234 updated 2026-11-07 cvss 5.8

kernel: wifi: rtl8xxxu: fix slab-out-of-bounds in rtl8xxxu_sta_add

Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more Red Hat Enterprise Linux 10 kernel
affected: no fix available “Fix deferred”
Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 23 d ago (2026-10-16)

Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.8	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Linux Linux

Classification

Weakness

CWE-787 Out-of-bounds Write

Technology feeds

Linux kernel rss critical rss

References

Sources

CVE List CVE-2025-71234
NVD CVE-2025-71234

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary