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Change History

In the Linux kernel, the following vulnerability has been resolved:

staging: rtl8723bs: fix stack buffer overflow in OnAssocReq IE parsing

The Supported Rates IE length from an incoming Association Request frame
was used directly as the memcpy() length when copying into a fixed-size
16-byte stack buffer (supportRate). A malicious station can advertise an
IE length larger than 16 bytes, causing a stack buffer overflow.

Clamp ie_len to the buffer size before copying the Supported Rates IE,
and correct the bounds check when merging Extended Supported Rates to
prevent a second potential overflow.

This prevents kernel stack corruption triggered by malformed association
requests.

https://git.kernel.org/stable/c/25411f5fcf5743131158f337c99c2bbf3f8477f5

https://git.kernel.org/stable/c/61871c83259a511980ec2664964cecc69005398b

https://git.kernel.org/stable/c/6ef0e1c10455927867cac8f0ed6b49f328f8cf95

https://git.kernel.org/stable/c/e841d8ea722315b781c4fc5bf4f7670fbca88875