CVE-2026-64441 staging: rtl8723bs: fix OOB reads in rtw_get_sec_ie(), rtw_get_wapi_ie(), and rtw_get_wps_attr()
Out-of-bounds reads in the rtl8723bs Wi-Fi driver allow attackers to cause denial of service or leak kernel memory.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-64441?
CVE-2026-64441 is a high-severity memory corruption vulnerability in Linux kernel, published on 25 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
staging: rtl8723bs: fix OOB reads in rtw_get_sec_ie(), rtw_get_wapi_ie(), and rtw_get_wps_attr()
Three IE/attribute parsing functions have missing bounds checks.
rtw_get_sec_ie() and rtw_get_wapi_ie() iterate over a raw IE buffer without verifying that the header bytes (tag + length) are within the remaining buffer before reading them. Additionally, rtw_get_sec_ie() compares the 4-byte WPA OUI at cnt+2 without checking that at least 6 bytes remain, and rtw_get_wapi_ie() compares a 4-byte WAPI OUI at cnt+6 without checking that at least 10 bytes remain.
rtw_get_wps_attr() reads wps_ie[0] and wps_ie+2 unconditionally at entry, before verifying that wps_ielen is large enough to contain the 6-byte WPS IE header (element_id + length + 4-byte OUI). Inside the attribute loop, get_unaligned_be16() is called on attr_ptr and attr_ptr+2 without checking that 4 bytes remain in the buffer.
Add a cnt+2 bounds check before each loop body in rtw_get_sec_ie() and rtw_get_wapi_ie(), guard each multi-byte comparison with a minimum IE length requirement, add a wps_ielen < 6 early return in rtw_get_wps_attr(), and add a 4-byte bounds check in its inner loop.
Weakness: CWE-125
Which versions are affected by CVE-2026-64441?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-64441?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-64441 being exploited?
There is no known exploitation of CVE-2026-64441 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-93680, BELL-CVE-2026-64441, DEBIAN-CVE-2026-64441, GHSA-9jwg-48fr-mhc6, ROOT-OS-DEBIAN-12-CVE-2026-64441, ROOT-OS-DEBIAN-13-CVE-2026-64441 and 2 more.