CVE-2026-90018 Linux kernel rtl8723bs - Buffer Overflow

Linux kernel staging rtl8723bs contains a stack buffer overflow and heap out-of-bounds read caused by missing length validation in rtw_get_wps_attr() when parsing WPS attributes in wireless management frames, letting remote attackers via crafted WPS IE in beacon or probe response cause stack corruption, exploit requires crafted wireless management frames.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.52% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Remote Code Execution, Denial Of Service
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
16 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for rtl8723bs rtw_get_wps_attr() vulnerability.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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